ORDER AND REASONS

LANCE M. AFRICK, District Judge.

Before the Court is a motion1 filed by defendant, Bayer CropScience, Inc. ("Amchem"), seeking "to exclude causation opinions regarding Benjamin Foster products based on the `each and every exposure' theory."2 Plaintiffs oppose the motion.3 For the following reasons, the motion is GRANTED.

BACKGROUND

Plaintiffs allege that decedent, Michael Comardelle ("Comardelle"), was "exposed to asbestos and asbestos-containing products manufactured, distributed, and sold" by defendants during the course of his employment from 1963 through 1979.4 Plaintiffs allege, "As a result of these exposures to toxic substances, including asbestos, [Comardelle] contracted cancer, mesothelioma, and lung cancer, which was first diagnosed on approximately September 25, 2013."5 Comardelle died on May 3, 2014, and his widow and children were substituted as plaintiffs.6

Among a myriad of other claims, plaintiffs allege that Comardelle was exposed to asbestos-containing "coatings, sealants, and mastics" manufactured, distributed, and sold by Amchem,7 including an adhesive called Benjamin Foster 81-27.8 Plaintiffs intend to call Dr. Samuel P. Hammar as an expert witness to opine that Benjamin Foster 81-27 was a substantial contributing factor to the development of Comardelle's mesothelioma.9 Amchem moves to exclude or limit this specific-causation10 opinion testimony, as well as any other expert testimony that relies on an "every exposure" theory.11

LAW AND ANALYSIS

A. Daubert and Rule 702

Rule 702 of the Federal Rules of Evidence governs the admissibility of expert witness testimony. See Daubert v. Merrell Dow Pharms., Inc., 509 U.S. 579, 588, 113 S.Ct. 2786, 125 L.Ed.2d 469 (1993); United States v. Hitt, 473 F.3d 146, 148 (5th Cir.2006). Rule 702 provides:

"To qualify as an expert, `the witness must have such knowledge or experience in [his] field or calling as to make it appear that his opinion or inference will probably aid the trier in his search for truth.'" United States v. Hicks, 389 F.3d 514, 524 (5th Cir.2004) (quoting United States v. Bourgeois, 950 F.2d 980, 987 (5th Cir.1992)). Additionally, Rule 702 states that an expert may be qualified based on "knowledge, skill, experience, training, or education." Hicks, 389 F.3d at 524; see also Kumho Tire Co., Ltd. v. Carmichael, 526 U.S. 137, 147, 119 S.Ct. 1167, 143 L.Ed.2d 238 (1999) (discussing witnesses whose expertise is based purely on experience). "A district court should refuse to allow an expert witness to testify if it finds that the witness is not qualified to testify in a particular field or on a given subject." Huss v. Gayden, 571 F.3d 442, 452 (5th Cir.2009) (quoting Wilson v. Woods, 163 F.3d 935, 937 (5th Cir.1999)). However, "Rule 702 does not mandate that an expert be highly qualified in order to testify about a given issue. Differences in expertise bear chiefly on the weight to be assigned to the testimony by the trier of fact, not its admissibility." Id.; see Daubert, 509 U.S. at 596, 113 S.Ct. 2786.

The U.S. Supreme Court's decision in Daubert "provides the analytical framework for determining whether expert testimony is admissible under Rule 702." Pipitone v. Biomatrix, Inc., 288 F.3d 239, 243 (5th Cir.2002). Both scientific and nonscientific expert testimony is subject to the Daubert framework, which requires trial courts to make a preliminary assessment to "determine whether the expert testimony is both reliable and relevant." Burleson v. Tex. Dep't of Criminal Justice, 393 F.3d 577, 584 (5th Cir.2004); see Kumho Tire, 526 U.S. at 147, 119 S.Ct. 1167.

A number of nonexclusive factors may be relevant to the reliability inquiry, including: (1) whether the technique has been tested, (2) whether the technique has been subjected to peer review and publication, (3) the potential error rate, (4) the existence and maintenance of standards controlling the technique's operation, and (5) whether the technique is generally accepted in the relevant scientific community. Burleson, 393 F.3d at 584. The reliability inquiry must remain flexible, however, as "not every Daubert factor will be applicable in every situation; and a court has discretion to consider other factors it deems relevant." Guy v. Crown Equip. Corp., 394 F.3d 320, 325 (5th Cir.2004); see Runnels v. Tex. Children's Hosp. Select Plan, 167 Fed.Appx. 377, 381 (5th Cir.2006) ("[A] trial judge has `considerable leeway' in determining `how to test an expert's reliability.'"). "Both the determination of reliability itself and the factors taken into account are left to the discretion of the district court consistent with its gatekeeping function under [Rule] 702." Munoz v. Orr, 200 F.3d 291, 301 (5th Cir.2000).

With respect to determining the relevancy of an expert's testimony pursuant to Rule 702 and Daubert, the proposed testimony must be relevant "not simply in the way all testimony must be relevant [pursuant to Rule 402], but also in the sense that the expert's proposed opinion would assist the trier of fact to understand or determine a fact in issue." Bocanegra v. Vicmar Servs., Inc., 320 F.3d 581, 584 (5th Cir.2003). "There is no more certain test for determining when experts may be used than the common sense inquiry whether the untrained layman would be qualified to determine intelligently and to the best degree the particular issue without enlightenment from those having a specialized understanding of the subject involved in the dispute." Vogler v. Blackmore, 352 F.3d 150, 156 n. 5 (5th Cir.2003) (quoting Fed.R.Evid. 702 advisory committee's note).

B. Analysis

"[I]n a number of recent cases, plaintiffs and their experts have advanced the argument that every exposure to asbestos is a factor in producing their illness." See Joseph Sanders, The "Every Exposure" Cases and the Beginning of the Asbestos Endgame, 88 Tul. L.Rev. 1153, 1157 (2014). As summarized by other courts addressing the admissibility of similar opinions, the "every exposure" theory "posits that any exposure to asbestos fibers whatsoever constitutes an underlying cause of injury to the individual exposed." Krik v. Crane Co., 76 F.Supp.3d 747, 750, No. 10-7435, 2014 WL 7330901, at *2 (N.D.Ill. Dec. 22, 2014) (emphasis in original); see also Davidson v. Ga. Pac. LLC, No. 12-1463, 2014 WL 3510268, at *2 (W.D.La. July 14, 2014) ("Dr. Schwartz testified that the `every exposure' theory includes all exposures to asbestos as a cause of mesothelioma because there is no way to know which exposures caused it and which ones did not.").

Dr. Hammar's proposed specific causation testimony is an example of this "every exposure" theory. In his expert report, Dr. Hammar opines that "all asbestos fibers inhaled by an individual that reach the target organ have the potential to contribute to the development of lung cancer, mesothelioma, and other asbestos-related diseases."12 At his deposition, he went further and opined that "all of the exposures that that individual had who developed mesothelioma, all of those would have contributed to cause his mesothelioma."13 Accordingly, Dr. Hammar opines based on this "every exposure" theory that "if Comardelle was exposed to asbestos released from Amchem or Benjamin Foster adhesives, ... those exposures [would] have been a substantial contributing cause of his disease."14

Amchem moves to exclude Dr. Hammar's testimony that Benjamin Foster 81-27 adhesive was a substantial factor in causing Comardelle's mesothelioma. According to Amchem, this is an "every exposure" theory opinion which does not pass muster under Rule 702 or Daubert. Amchem criticizes as wholly unsupported Dr. Hammar's leap from the general-causation premise that every asbestos exposure increases the risk of mesothelioma,15 to the specific-causation opinion that Comardelle's exposure to Benjamin Foster 81-27 necessarily caused or contributed to his mesothelioma.16 Amchem also faults Dr. Hammar for failing to consider any facts or data specific to Comardelle's exposure to Benjamin Foster 81-27, or to compare or differentiate between the different alleged asbestos exposures at issue in this case.17 In support of these arguments, Amchem cites several recent district court opinions rejecting substantially similar expert causation testimony based on the "every exposure" theory.

First, in Smith v. Ford Motor Co., the district court excluded Dr. Hammar's opinion that a plaintiff's exposure to brake dust caused his mesothelioma because "each and every exposure to asbestos by a human being who is later afflicted with mesothelioma, contributed to the formation of the disease." No. 08-630, 2013 WL 214378, at *1 (D.Utah Jan. 18, 2013). The Smith court held that opinion to be inadmissible and "agree[d] with the growing number of published opinions from other courts that have reached a similar result: that the every exposure theory as offered as a basis for legal liability is inadmissible speculation that is devoid of responsible scientific support." Id. at *2. As the court in Smith succinctly explained, "Just because we cannot rule anything out does not mean we can rule everything in." Id. at *3. The court also noted the complete lack of "studies, reports, examinations, or data of any kind to show that the alleged dust that Mr. Smith allegedly breathed in ... was sufficient to be a contributing cause, substantial or otherwise, to the development of" the disease." Id. at *4; accord Anderson v. Ford Motor Co., 950 F.Supp.2d 1217 (D.Utah 2013) (following Smith).

In Davidson v. Georgia Pacific LLC, the district court likewise rejected a causation opinion based on the "every exposure" theory, concluding that the theory "is not testable and consequently cannot have an error rate, thus failing to satisfy two Daubert factors." 2014 WL 3510268, at *5. The court also faulted the expert for failing to rely on any data "that would show that any particular defendant's product actually caused Davidson to develop mesothelioma." Id.18

In Krik v. Crane Co., the district court rejected a specific causation opinion based on the theory that because an expert "cannot rule out that a single dose of asbestos causes injury.... any and all exposure to asbestos is necessarily harmful." 76 F.Supp.3d at 752, 2014 WL 7330901, at *4. The district court held that "This is not an acceptable approach for a causation expert to take" Id. Accordingly, the Krik court excluded the testimony because it was unreliable and because the experts "fail[ed] to base their opinions on facts specific to this case." Id. at 753, 2014 WL 7330901 at *5.

In opposition, plaintiffs submit a number of orders from state courts apparently denying motions to exclude Dr. Hammar's opinions, albeit without any articulated reasoning or analysis.19 The Court is unable to abdicate its gatekeeping function in this case solely because other courts in other cases have, for unknown reasons, declined to exclude Dr. Hammar's testimony. Accordingly, plaintiffs' citations have little persuasive weight.

The Court agrees with Amchem that Dr. Hammar's proposed specific causation opinions in this case are unreliable and inadmissible, essentially for the reasons articulated by the thoughtful opinions in Smith, Anderson, Davidson, and Krik. Although there may be no known safe level of asbestos exposure, this does not support Dr. Hammar's leap to the conclusion that therefore every exposure Comardelle had to asbestos must have been a substantial contributing cause of his mesothelioma. The Court agrees that this "is not an acceptable approach for a causation expert to take." Krik, 76 F.Supp.3d at 753, 2014 WL 7330901, at *4, and it is "precisely the kind of testimony the Supreme Court in General Electric Co. v. Joiner ... observed as being nothing more than the `ipse dixit of the expert.'" Smith, 2013 WL 214378, at *2 (quoting 522 U.S. 136, 146, 118 S.Ct. 512, 139 L.Ed.2d 508 (1997)). This kind of blanket specific causation opinion is not based on or tied to the specific facts and circumstances of any of Comardelle's exposures to asbestos and it elides any differences or nuances of duration, concentration, exposure, and the properties of the fibers to which he may have been exposed.20 The Court is not persuaded that such a one-size-fits-all approach is reliable expert testimony.21

Plaintiffs, as the proponents of the testimony, have not established by a preponderance of the evidence that Dr. Hammar's specific causation opinions in this case are reliable. See Mathis v. Exxon Corp., 302 F.3d 448, 459 (5th Cir.2002). Instead of explaining how Dr. Hammar can reliably opine that Benjamin Foster 81-27 was a cause of Comardelle's mesothelioma, plaintiffs refer cursorily to a broad array of cases, studies, and regulatory materials.22 Suffice it to say, plaintiffs overstate or misstate the relevance of these sources.23 None of those citations plug the impermissible gap in Dr. Hammar's reasoning from the general causation proposition that exposure to asbestos increases the risk of mesothelioma, to the specific causation opinion that in this case Comardelle's exposure to Benjamin Foster 81-27 was a cause of his mesothelioma giving rise to liability. See, e.g., Anderson, 950 F.Supp.2d at 1225 (excluding testimony despite plaintiff's citation to "numerous scholarly articles and scientific studies" because those materials were not specific to "the type of exposure Mr. Anderson had to Defendants' products"). Accordingly, the Court concludes that Dr. Hammar's specific-causation opinions as to Benjamin Foster 81-27 (and all other exposures at issue in this case), are an unreliable product of the "every exposure theory" and must be excluded.24

IT IS ORDERED that Amchem's motion is GRANTED. At trial, Dr. Hammar may not offer specific causation testimony based on the "every exposure" theory that Comardelle's mesothelioma was caused by any particular exposure to a defendant's product or premises, including Benjamin Foster 81-27. Dr. Hammar may opine regarding Comardelle's diagnosis of mesothelioma and issues of general causation. To the extent that this order and reasons rejecting the "every exposure" theory as a basis for specific causation testimony implicates the admissibility of testimony by other expert witnesses, those issues will be addressed by separate order. No such testimony shall be elicited without a prior order of the Court and the parties shall edit Dr. Hammar's videotaped deposition to remove opinion testimony excluded by this Order and Reasons.