GAMMAGE, Justice,
delivered the opinion
of the Court, in which
PHILLIPS, Chief Justice, and HIGHTOWER, DOGGETT, CORNYN and SPECTOR, Justices, join.
I.
This case is a products liability death action. The defendants, manufacturers and suppliers of foods containing sulfites, obtained a summary judgment in the trial court. The court of appeals reversed in part and affirmed in part. 850 S.W.2d 529. We affirm.
II.
Susan Trapnell was a chronic asthmatic. She was allergic to sulfites, a food additive used to process and preserve food. Her reactions to sulfites ranged from “asthma attacks” to, in severe cases, “anaphylactic shock.” After one particularly serious episode, Susan was referred to Dr. Ronald Simon, an expert in the diagnosis and treatment of sulfite sensitive persons.1 After [798]*798testing Susan, Dr. Simon concluded that she was extremely sensitive to sulfites. Dr. Simon advised Susan to avoid certain foods which commonly contain sulfites. He counseled her that when she ate at restaurants, she should ask whether sulfites were in the foods she wished to eat. In case she accidentally ingested sulfites, Susan always carried a hypodermic syringe of epinephrine.
On August 5, 1984, Susan, her husband, Benjamin, and their son, Nicholas, went to the Officer’s Club at the Corpus Christi Naval Air Station to dine at the buffet. Before going through the buffet line, Benjamin asked one of the cooks whether any sulfites had been used in the preparation of the fruit salad. The cook, Robert Mangohig, responded that no sulfites had been used, but offered to get Mr. Trapnell some fresh fruit from the kitchen. Mr. Trapnell declined, and the Trapnells went through the buffet line. Susan allegedly served herself fruit from the fresh fruit bowl, hash browns, apple pie filling, and other foods.
Within minutes after she began eating, Susan had a violent reaction. The Trapnells immediately tried to leave the Club and go to the hospital. Susan made it only to the Club’s lobby before collapsing. Benjamin administered epinephrine from the emergency kit. Before E.M.S. arrived, Susan began having seizures. E.M.S. rushed Susan to the Naval Air Station Hospital, where she arrived with no pulse. At the hospital, emergency room personnel succeeded in bringing Susan’s blood pressure back. For the next several days, Susan remained unresponsive to stimuli. Susan’s brain activity ceased on August 9, and on August 10, the doctors pronounced her dead. No autopsy was performed.
In summary judgment evidence, experts stated that although sulfites can be ingested from many sources, including air pollution, in their opinion Susan died as a result of eating food containing sulfites. Specifically, they identified three foods that Susan had on her plate as potentially containing sulfites: potato whitener on the fruit salad, apple pie filling, and hash browns.
The sulfite manufacturers and other parties in the chain of distribution are as follows:
Potato Whitener:
Hoechst Celanese Corporation, Specialty Group (formerly known as Virginia Chemicals, Inc.), manufactured sodium metabisul-fite and sold it to John Hogan Interests d/b/a First Foods Company, Inc. First Foods manufactured potato whitener from the sodium metabisulfite it acquired from Hoechst Celanese and sold it to Nordhaus. Nordhaus sold potato whitener to Sysco Food Services, Inc. of Sysco Corporation. Sysco sold potato whitener to the Officer’s Club.
Hash Browns:
Allied Corporation manufactured and sold sulfites to Univar Corporation. Univar sold the sulfites to Lamb-Weston, Inc. Lamb-Weston processed hash browns and sold them to Sysco. Sysco sold the hash browns to the Officer’s Club.
Apple Pie Filling:
Allied manufactured sulfites and sold them to McKesson Chemical Company. McKes-son then sold sulfites to Zero Pack. Zero Pack added sulfites to apples during processing and sold them to Globe. Globe manufactured apple pie filling and sold it to Labatt Institutional Supply Company. Labatt sold apple pie filling to the Officer’s Club.
III.
On May 22, 1986, the Trapnells brought suit against Sysco and other defendants in state district court, alleging negligence, Deceptive Trade Practices, strict liability, and breach of warranty. On December 22, 1986, the Trapnells filed suit against the United States Department of the Navy under the Federal Tort Claims Act (“F.T.C.A.”), 28 U.S.C.A. §§ 1346(b), 2671 et seq. (West 1993; West 1965 & Supp.1994). The Trapnells claimed that the Navy was negligent in using sulfites and in failing to warn Susan of the sulfites in the food they prepared.
On March 30, 1989, the federal district court issued a stay order pending the conclusion of the state suit against the manufacturers and distributors. On June 16,1989, upon the motion of the defendants, the state dis[799]*799trict court ordered an abatement in order for the defendants to try to intervene in federal court, have the federal court stay lifted, and have all the parties litigate all claims in federal court. In a September 26, 1989 order, the federal court denied the motion to intervene on the grounds that it did not have jurisdiction over the proposed intervenors. Relying on Finley v. United States, 490 U.S. 545, 555-56, 109 S.Ct. 2003, 2010-11, 104 L.Ed.2d 593 (1989), the federal court held that the Federal Tort Claims Act does not permit the assertion of pendent jurisdiction over additional parties as to which there is no independent basis for federal jurisdiction. It held that there was no independent basis for asserting federal jurisdiction over the proposed intervenors in this case because diversity jurisdiction requires that each defendant be a citizen of a different state from the plaintiffs, and one of the defendants (namely Sysco) did not meet this requirement.2
At this point, the proceedings were at a standstill. The state trial court refused several motions to vacate its order of abatement, for reasons that are not clear from the record. The plaintiffs filed a petition for writ of mandamus in the court of appeals in which they complained of the trial court’s January 5, 1990 refusal to lift its abatement order. Holding that the abatement order unconstitutionally deprived plaintiffs of a forum under the “open courts” clause of the Texas Constitution,3 the court of appeals ordered the trial court to lift the abatement order. Trapnell v. Hunter, 785 S.W.2d 426, 429 (Tex.App. — Corpus Christi 1990, origmal proceeding) (Trapnell I) (opinion issued February 1, 1990).
On July 31,1990, soon after the state court complied with the court of appeals’ mandate and the ease proceeded to trial, the trial court granted summary judgment as to one of the defendants, First Foods. First Foods’ motion for summary judgment alleged that its product did not cause Susan Trapnell’s death. During the appeal of the order granting First Foods’ summary judgment, the federal court lifted its stay and proceeded to try the plaintiffs’ F.T.C.A. claim against the Navy.4
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GAMMAGE, Justice,
delivered the opinion
of the Court, in which
PHILLIPS, Chief Justice, and HIGHTOWER, DOGGETT, CORNYN and SPECTOR, Justices, join.
I.
This case is a products liability death action. The defendants, manufacturers and suppliers of foods containing sulfites, obtained a summary judgment in the trial court. The court of appeals reversed in part and affirmed in part. 850 S.W.2d 529. We affirm.
II.
Susan Trapnell was a chronic asthmatic. She was allergic to sulfites, a food additive used to process and preserve food. Her reactions to sulfites ranged from “asthma attacks” to, in severe cases, “anaphylactic shock.” After one particularly serious episode, Susan was referred to Dr. Ronald Simon, an expert in the diagnosis and treatment of sulfite sensitive persons.1 After [798]*798testing Susan, Dr. Simon concluded that she was extremely sensitive to sulfites. Dr. Simon advised Susan to avoid certain foods which commonly contain sulfites. He counseled her that when she ate at restaurants, she should ask whether sulfites were in the foods she wished to eat. In case she accidentally ingested sulfites, Susan always carried a hypodermic syringe of epinephrine.
On August 5, 1984, Susan, her husband, Benjamin, and their son, Nicholas, went to the Officer’s Club at the Corpus Christi Naval Air Station to dine at the buffet. Before going through the buffet line, Benjamin asked one of the cooks whether any sulfites had been used in the preparation of the fruit salad. The cook, Robert Mangohig, responded that no sulfites had been used, but offered to get Mr. Trapnell some fresh fruit from the kitchen. Mr. Trapnell declined, and the Trapnells went through the buffet line. Susan allegedly served herself fruit from the fresh fruit bowl, hash browns, apple pie filling, and other foods.
Within minutes after she began eating, Susan had a violent reaction. The Trapnells immediately tried to leave the Club and go to the hospital. Susan made it only to the Club’s lobby before collapsing. Benjamin administered epinephrine from the emergency kit. Before E.M.S. arrived, Susan began having seizures. E.M.S. rushed Susan to the Naval Air Station Hospital, where she arrived with no pulse. At the hospital, emergency room personnel succeeded in bringing Susan’s blood pressure back. For the next several days, Susan remained unresponsive to stimuli. Susan’s brain activity ceased on August 9, and on August 10, the doctors pronounced her dead. No autopsy was performed.
In summary judgment evidence, experts stated that although sulfites can be ingested from many sources, including air pollution, in their opinion Susan died as a result of eating food containing sulfites. Specifically, they identified three foods that Susan had on her plate as potentially containing sulfites: potato whitener on the fruit salad, apple pie filling, and hash browns.
The sulfite manufacturers and other parties in the chain of distribution are as follows:
Potato Whitener:
Hoechst Celanese Corporation, Specialty Group (formerly known as Virginia Chemicals, Inc.), manufactured sodium metabisul-fite and sold it to John Hogan Interests d/b/a First Foods Company, Inc. First Foods manufactured potato whitener from the sodium metabisulfite it acquired from Hoechst Celanese and sold it to Nordhaus. Nordhaus sold potato whitener to Sysco Food Services, Inc. of Sysco Corporation. Sysco sold potato whitener to the Officer’s Club.
Hash Browns:
Allied Corporation manufactured and sold sulfites to Univar Corporation. Univar sold the sulfites to Lamb-Weston, Inc. Lamb-Weston processed hash browns and sold them to Sysco. Sysco sold the hash browns to the Officer’s Club.
Apple Pie Filling:
Allied manufactured sulfites and sold them to McKesson Chemical Company. McKes-son then sold sulfites to Zero Pack. Zero Pack added sulfites to apples during processing and sold them to Globe. Globe manufactured apple pie filling and sold it to Labatt Institutional Supply Company. Labatt sold apple pie filling to the Officer’s Club.
III.
On May 22, 1986, the Trapnells brought suit against Sysco and other defendants in state district court, alleging negligence, Deceptive Trade Practices, strict liability, and breach of warranty. On December 22, 1986, the Trapnells filed suit against the United States Department of the Navy under the Federal Tort Claims Act (“F.T.C.A.”), 28 U.S.C.A. §§ 1346(b), 2671 et seq. (West 1993; West 1965 & Supp.1994). The Trapnells claimed that the Navy was negligent in using sulfites and in failing to warn Susan of the sulfites in the food they prepared.
On March 30, 1989, the federal district court issued a stay order pending the conclusion of the state suit against the manufacturers and distributors. On June 16,1989, upon the motion of the defendants, the state dis[799]*799trict court ordered an abatement in order for the defendants to try to intervene in federal court, have the federal court stay lifted, and have all the parties litigate all claims in federal court. In a September 26, 1989 order, the federal court denied the motion to intervene on the grounds that it did not have jurisdiction over the proposed intervenors. Relying on Finley v. United States, 490 U.S. 545, 555-56, 109 S.Ct. 2003, 2010-11, 104 L.Ed.2d 593 (1989), the federal court held that the Federal Tort Claims Act does not permit the assertion of pendent jurisdiction over additional parties as to which there is no independent basis for federal jurisdiction. It held that there was no independent basis for asserting federal jurisdiction over the proposed intervenors in this case because diversity jurisdiction requires that each defendant be a citizen of a different state from the plaintiffs, and one of the defendants (namely Sysco) did not meet this requirement.2
At this point, the proceedings were at a standstill. The state trial court refused several motions to vacate its order of abatement, for reasons that are not clear from the record. The plaintiffs filed a petition for writ of mandamus in the court of appeals in which they complained of the trial court’s January 5, 1990 refusal to lift its abatement order. Holding that the abatement order unconstitutionally deprived plaintiffs of a forum under the “open courts” clause of the Texas Constitution,3 the court of appeals ordered the trial court to lift the abatement order. Trapnell v. Hunter, 785 S.W.2d 426, 429 (Tex.App. — Corpus Christi 1990, origmal proceeding) (Trapnell I) (opinion issued February 1, 1990).
On July 31,1990, soon after the state court complied with the court of appeals’ mandate and the ease proceeded to trial, the trial court granted summary judgment as to one of the defendants, First Foods. First Foods’ motion for summary judgment alleged that its product did not cause Susan Trapnell’s death. During the appeal of the order granting First Foods’ summary judgment, the federal court lifted its stay and proceeded to try the plaintiffs’ F.T.C.A. claim against the Navy.4 On September 14, 1990, the federal court, based on its finding that no potato whitener had been added to the fruit salad, held that the Navy was not liable and rendered judgment that the plaintiffs take nothing by their claims. On September 17, 1990, the state trial court granted First Foods’ motion to sever all claims against it, including the cross-claims asserted by the other defendants, enabling the plaintiffs to immediately appeal the summary judgment. On April 25, 1991, the state court of appeals reversed First Foods’ summary judgment because it concluded that the motion and response raised a fact issue regarding causation. Trapnell v. First Foods Co., 809 S.W.2d 606, 611 (Tex.App. — Corpus Christi 1991, writ denied) (Trapnell II). The court of appeals refused to consider First Foods’ argument that the plaintiffs were collaterally estopped from relitigating the federal court’s finding that potato whitener was not added [800]*800to the fruit salad, on the grounds that collateral estoppel was not raised as a basis for summary judgment in the trial court. See Trapnell, 809 S.W.2d at 608.
Meanwhile, the trial court granted summary judgments in favor of all other defendants, who had asserted in their motions for summary judgment the grounds that (1) collateral estoppel barred relitigation of the federal court’s finding that potato whitener was not in the fruit salad, as to the potato whitener defendants and (2) lack of causation as to the other defendants was proven as a matter of law.5 The court of appeals reversed in part and affirmed in part. 850 S.W.2d 529, 532 (Trapnell III). We affirm the court of appeals.
IV.
The central issues are: (1) whether the summary judgment evidence on causation raises a fact issue so as to prevent summary judgment in favor of the hash brown and apple pie filling defendants, and (2) whether the federal court’s finding that potato whitener was not in the fruit bowl precludes the Trapnells from litigating the issue in state court.6
A. CAUSATION
The first question is whether the summary judgment evidence raises a fact issue sufficient to preclude summary judgment in favor of the potato whitener, hash brown, and apple pie filling defendants. In reviewing summary judgment evidence, the issue is whether the evidence establishes as a matter of law that there is no genuine issue of fact as to one or more of the necessary elements of the plaintiffs cause of action. Gibbs v. General Motors Corp., 450 S.W.2d 827, 828 (Tex.1970). The standards in reviewing summary judgment evidence are:
(1)The movant for summary judgment has the burden of showing that there is no genuine issue of fact and that it is entitled to judgment as a matter of law.
(2) In deciding whether there is a material fact issue precluding summary judgment, evidence favorable to the non-movant will be taken as true.
(3) Every reasonable inference must be indulged in favor of the non-movant and any doubts resolved in its favor.
Nixon v. Mr. Property Management Co., 690 S.W.2d 546, 548-49 (Tex.1985). The issue here, then, is whether the three sets of defendants carried their burden in showing that there was no genuine issue of fact as to causation. To their response to the potato whitener defendants’ motions for summary judgment, the Trapnells attached the affidavits of Dr. Ronald Simon, an expert in sulfite sensitivity who had treated Susan. Dr. Simon’s affidavit of July 17, 1990 raises a fact issue about whether whitener was added to the fruit salad and whether it caused Susan Trapnell’s death. Dr. Simon stated that Susan probably died from potato whitener on the fruit salad. Dr. Simon based his belief on (1) the rapidity of Susan’s reaction, which was consistent with the ingestion of “loose sulfites” such as those contained in potato whitener; (2) his knowledge of the likely quantity of sulfites contained in particular food products in the United States, including potato whitener; and (3) his knowledge of the amount of sulfites needed to cause a fatal reaction in Susan. The Trapnells also attached to their response the affidavit of Dr. Steve Taylor, a biochemist and professor of food science and technology. Agreeing with Dr. Simon, Dr. Taylor stated that “the fruit salad is the only food consumed by Susan Trapnell that could have contained levels of sulfites sufficient to provoke or contribute to her severe response.”
As to the hash brown and apple pie filling defendants, neither established their right to summary judgment by conclusively [801]*801negating the element of causation. To their motions for summary judgment, the hash brown defendants attached the same July 17, 1990 affidavit made by Dr. Simon. In the affidavit, Dr. Simon stated that although he did not believe that the hash browns alone contained a sufficient quantity of sulfites to cause Susan’s death, they could have contributed to her death in combination with sulfites from another source, in particular the potato whitener. Dr. Simon based this opinion on data concerning the usual levels of sulfites in particular foods, including a study on the sulfite levels in hash browns and other potato products by the California Food and Drug Administration. We believe that such testimony raises a fact issue on the issue of whether the hash browns caused or contributed to Susan’s death.
The apple pie defendants also attached Dr. Simon’s July 17, 1990 affidavit and Dr. Taylor’s affidavit to their summary judgment motions. When both the affidavits are considered, they raise a fact issue as to the apple pie filling. A juror could believe Dr. Simon’s estimate that the hash browns contained 8 milligrams of sulfite and also believe Dr. Taylor’s use of a 12.5 milligram figure for the apple pie filling. Taken together, these figures add up to 20.5 milligrams of sulfite, more than the threshold amount of 20 milligrams that both experts stated would be necessary to provoke such a severe reaction in Susan. The submission of these affidavits by the hash browns and apple pie filling defendants addresses the element of cause-in-fact, but in their summary judgment motions, none of these defendants attempts to negate foreseeability, so we do not reach the issue. Because the hash brown and apple pie filling defendants’ own summary judgment evidence raises fact issues on cause-in-fact and does not purport to conclusively negate proximate cause, neither set of defendants established their right to summary judgment.
B. COLLATERAL ESTOPPEL
The court of appeals held that the federal judgment does not preclude the Trapnells from relitigating in state court whether potato whitener was in the fruit bowl. 850 S.W.2d at 535. Although we do not agree with the court’s reasoning, we agree that collateral estoppel should not be applied in this case because doing so would not promote the goals served by the doctrine.
The doctrine of collateral estoppel or issue preclusion is designed to promote judicial efficiency, protect parties from multiple lawsuits, and prevent inconsistent judgments by precluding the relitigation of issues. See Lytle v. Household Mfg. Inc., 494 U.S. 545, 553, 110 S.Ct. 1331, 1337, 108 L.Ed.2d 504 (1990); Allen v. McCurry, 449 U.S. 90, 94, 101 S.Ct. 411, 414, 66 L.Ed.2d 308 (1980); Montana v. United States, 440 U.S. 147, 153-54, 99 S.Ct. 970, 973-74, 59 L.Ed.2d 210 (1979). A party seeking to assert the bar of collateral estoppel must establish that (1) the facts sought to be litigated in the second action were fully and fairly litigated in the first action; (2) those facts were essential to the judgment in the first action; and (3) the parties were cast as adversaries in the first action. See Allen, 449 U.S. at 94-95, 101 S.Ct. at 414-15; Hicks v. Quaker Oats Co., 662 F.2d 1158, 1166 (5th Cir.1981); Eagle Properties, Ltd. v. Scharbauer, 807 S.W.2d 714, 721 (Tex.1990); Tarter v. Metropolitan Sav. & Loan Ass’n, 744 S.W.2d 926, 927 (Tex.1988); Bonniwell v. Beech Aircraft Corp., 663 S.W.2d 816, 818 (Tex.1984).7 Strict mutuality of parties is no longer required. See Allen, 449 U.S. at 94-95, 101 S.Ct. at 414-15; Blonder-Tongue Laboratories, Inc. v. University of Illinois Foundation, 402 U.S. 313, 349-50, 91 S.Ct. 1434, [802]*8021453-54, 28 L.Ed.2d 788 (1971); Eagle Properties, 807 S.W.2d at 721. To satisfy the requirements of due process, it is only necessary that the party against whom the doctrine is asserted was a party or in privity with a party in the first action. See Eagle Properties, 807 S.W.2d at 721; Benson v. Wanda Petroleum Co., 468 S.W.2d 361, 363 (Tex.1971); Michael Kimmel, The Impacts of Defensive and Offensive Assertion of Collateral Estoppel by a Nonparty, 35 Geo. Wash.L.Rev. 1010, 1014 (1967).
The court of appeals held that collateral estoppel should not apply because the issue to be estopped was not fully and fairly litigated in the federal trial. However, the court of appeals reached this conclusion only after improperly characterizing the issue to be es-topped as “causation,” rather than the more narrow issue of whether potato whitener was added to the fruit salad.8 Since collateral estoppel is an affirmative defense, the potato whitener defendants had the burden of pointing out the issue they wished to be estopped; in their motions for summary judgment and in their briefs before this Court, they have argued only that the limited issue of whether potato whitener was added to the fruit salad has already been litigated. They specifically deny asserting any preclusive effect to any determination of causation by the federal court.
When the issue is properly identified, it becomes clear that this issue was fully and fairly litigated in the federal action. See IB James Wm. Moore, Moore’s Federal Practice § 0.441[3.-3] (June 1983) (“[T]he circumstances in which it can be said that the parties to suits in the federal courts lack a ‘full and fair opportunity’ to present their claims and defenses are probably very limited.”). The issue was necessary to the federal court’s judgment that the Navy did not breach its duty to Benjamin Trapnell to adequately respond to his question. The court stated in its September 14, 1990 order that “[bjeeause this court finds that the Officer’s Club staff did not use potato whitener in preparing the fruit bowl, Mangohig’s response fulfilled that duty.” There was no difference in the burdens of proof on this issue in the federal and state actions. See Restatement (Second) Of Judgments §§ 28(4), 29 (1982) (stating that even where an issue is actually litigated and determined by a valid and final judgment, and the determination is essential to the judgment, relit-igation of the issue in a subsequent action is not precluded when the party against whom preclusion is sought had a significantly heavier burden of persuasion with respect to the issue in the initial action than in the subsequent action); Scurlock Oil Co. v. Smithwick, 724 S.W.2d 1, 7 (Tex.1986) (citing the Restatement); Geoffrey C. Hazard, Jr., Res Nova in Res Judicata, 44 S.Cal.L.Rev. 1036, 1044 (1971) (arguing that relitigation of an issue may be warranted where the burden of proof on that issue differs between the first and second actions). Assuming without deciding that Texas law encompasses the theory of alternative liability or the other theories of collective liability urged by the plaintiffs, the plaintiffs still have the preliminary burden of proving by a preponderance of the evidence that Susan was exposed to the allegedly harmful product, i.e., potato whitener. See Restatement (Second) Of Torts § 433B(2) & (3) (1982) (requiring the plaintiff to first prove that the defendants acted tor-tiously before shifting the burden to the defendants). The federal court, applying Texas [803]*803tort liability law,9 placed the same burden on the plaintiffs with respect to this issue.
We also disagree that the lack of joinder of all defendants in the first action adversely affected litigation of the issue of whether potato whitener was. added to the fruit salad. Although the court of appeals correctly notes that joinder of the manufacturers and suppliers of the three food products would be advantageous to the plaintiffs on the general issue of causation, the same is not necessarily true regarding this narrower issue. The Trapnells had every incentive to litigate this issue, and indeed may have been aided by the absence of the other defendants in this regard; they did not have to be concerned with proving their case against the potato whitener defendants so strongly as to cast doubt upon their claims against the hash brown and apple pie defendants.10
Nevertheless, we agree with the court of appeals’ resolution of this case because we do not believe that the purposes of the doctrine of collateral estoppel would be served by applying it to these facts. Cf. Lytle, 494 U.S. at 553, 110 S.Ct. at 1337 (holding that “the purposes served by collateral estoppel do not justify applying the doctrine in this case”). Applying collateral estoppel against the Trapnells would not conserve judicial resources, because the parties could still reliti-gate the issue of whether potato whitener caused Susan Trapnell’s death. A fundamental principle of collateral estoppel is that it can only be asserted against one who was a party to or in privity with a party to the prior litigation. See Blonder-Tongue, 402 U.S. at 329, 91 S.Ct. at 1443 (“Some litigants — those who never appeared in a prior action — may not be collaterally estopped without litigating the issue. They have never had a chance to present their evidence and arguments on the claim. Due process prohibits estopping them....”); Eagle Properties, 807 S.W.2d at 721 (holding that “it is only necessary that the party against whom the plea of collateral estoppel is being asserted be a party or in privity with a party in the prior litigation”); Benson, 468 S.W.2d at 363 (“Due process requires that the rule of collateral estoppel operate only against persons who have had their day in court either as a party to the prior suit or as a privy_”). The non-potato whitener defendants were not parties to the prior federal case, and no one has asserted that they were in privity with the Trapnells or with the Navy. Consequently, if the Trapnells were precluded by collateral estoppel from proceeding against the potato whitener defendants, the non-potato whitener defendants would still be able to argue in their absence that potato whitener was in the fruit salad and that it, not their product, caused Susan’s death.11 The goal of conserving judicial resources by preventing [804]*804relitigation, then, would not be served. See Lytle, 494 U.S. at 553, 110 S.Ct. at 1337.12
In addition, the goal of protecting defendants from being subjected to multiple lawsuits is simply not applicable to the facts of this. case. See Montana, 440 U.S. at 153, 99 S.Ct. at 973 (stating that the application of collateral estoppel protects parties “from the expense and vexation attending multiple lawsuits”); Steven C. Malin, Collateral Estoppel: The Fairness Exception, 53 J.Air L. & Com. 959, 965 (1988) (same). The potato whitener defendants themselves will not have to defend two suits. Cf. Lytle, 494 U.S. at 553, 110 S.Ct. at 1337 (holding that the goal of protecting parties from multiple lawsuits was not implicated).
Application of collateral estoppel also will not necessarily prevent the possibility of inconsistent findings. Since the non-potato whitener defendants are free to raise the potato whitener issue, the jury could exonerate the non-potato whitener defendants on the basis of a finding that the potato whitener was present and caused Susan Trapnell’s death. See Tarter v. Metropolitan Savings & Loan Ass’n, 744 S.W.2d 926, 928 (Tex.1988) (holding that the “doctrine of collateral estoppel applies when relitigation could re-suit in an inconsistent determination of the same ultimate issue ” (emphasis in original)).
Application of collateral estoppel also involves considerations of fairness not encompassed by the “full and fair opportunity” inquiry. See Blonder-Tongue, 402 U.S. at 328, 91 S.Ct. at 1442 (describing the “goal of limiting relitigation of issues where that can be achieved without compromising fairness in particular cases”); Benson, 468 S.W.2d at 362-63 (“It has been said that the rule rests upon equitable principles and upon the broad principles of justice.”).13 Given the procedural uniqueness of this case, considerations of fairness are especially important. The Trap-nells were prevented from filing all of their claims in one suit by case law that has subsequently been overruled by statute. If collateral estoppel were applied, the Trapnells would face a situation in which they would be foreclosed from litigating the potato whitener issue as to one set of defendants, yet the issue would remain in the case as a defense to the Trapnells’ claims against the remaining defendants. Because of a previous suit in a forum dictated by statute, they would be deprived of the opportunity to have all three sets of defendants in one trial.14
[805]*805In sum, applying collateral estoppel in this case would fulfill none of the doctrine’s purposes: it would neither conserve judicial resources nor prevent multiple lawsuits. In addition, applying collateral estoppel would be unfair to the Trapnells, whose procedural predicament is not of their own making. Our holding today is a narrow one, given the unusual procedural posture of this case and the fact that statutory changes make it unlikely that this situation will recur in the future. For these reasons, collateral estop-pel should not be applied here. Consequently, we need not reach and neither approve nor disapprove of the court of appeals’ holding that application of collateral estoppel would violate the Trapnells’ right to trial by jury under the Texas Constitution. See Tex. Const, art. 1, § 15; art. 5, § 10.
Finally, we must address Allied’s complaint that the court of appeals ignored its argument that collateral estoppel bars relit-igating the issue of whether the Navy was aware of the risks of sulfites in processed foods. Allied contends that this issue was fully and fairly litigated in the federal trial and that regardless of whether preclusive effect is given to the potato whitener issue, relitigation of this separate issue should be precluded. Allied argues that if the plaintiffs are estopped from relitigating this issue, their claim that the defendants engaged in a conspiracy to promote the use of sulfites and restrict the dissemination of information on its dangers fails.
Whatever the merits of this argument, we cannot hold for Allied because it did not assert collateral estoppel as a ground for summary judgment in its motion in the trial court. Although Allied’s memorandum in support of the motion for summary judgment raised this argument, a “motion must stand or fall on the grounds expressly presented in the motion.” McConnell v. Southside Ind. Sch. Dist., 858 S.W.2d 337, 341 (Tex.1993). Consequently, we may not uphold summary judgment for Allied on this ground.
Because we find that there is a question of fact regarding the hash brown and apple pie filling defendants and the federal judgment does not preclude the Trapnells from litigating the issue of whether potato whitener was in the fruit-salad, we affirm the judgment of the court of appeals.