Meyer

MEMORANDUM **

Plaintiffs Richard and Stella Meyer allege that Mr. Meyer consumed nutritional supplements containing L-tryptophan, an amino acid, manufactured by defendant Showa Denko. They further allege that the Showa Denko L-tryptophan caused Mr. Meyer to develop eosinophilia-myalgia syndrome (EMS), a painful and debilitating auto-immune disease. The Meyers seek to prove that Mr. Meyer had taken Ltryptophan manufactured by Showa Denko through expert testimony from Dr. Gerald Gleich. The district court excluded Dr. Gleich’s testimony under Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 , 113 S.Ct. 2786 , 125 L.Ed.2d 469 (1993), because it concluded that Dr. Gleich’s opinion that Sliowa Denko manufactured L-tryptophan is the sole cause of EMS is not supported by the scientific literature. The district court then granted summary judgment for Showa Denko. We now reverse the district court’s exclusion of Dr. Gleich’s testimony and therefore also reverse the district court’s grant of summary judgment to Showa Denko.

I

We review the district court’s decision to exclude expert testimony for an abuse of discretion. See Kumho Tire Co., Ltd. v. Carmichael, 526 U.S. 137, 152…