Mary Beth Montera v. Premier Nutrition Corporation, 111 F.4th 1018

Mary Beth Montera brought a class action on behalf of New York purchasers of Joint Juice, a dietary supplement marketed by Premier Nutrition, alleging deceptive conduct and false advertising under New York General Business Law (GBL) §§ 349 and 350.
The claims focused on Joint Juice’s packaging statements touting joint health benefits, specifically for people with joint pain or arthritis, which were contradicted by independent scientific studies.
The district court certified a New York class, denied Premier’s later motion to decertify, and the case proceeded to a jury trial, which resulted in a verdict for Montera.
The jury found Premier’s marketing claims were materially misleading and awarded actual damages based on class-wide purchases.
The district court opted for statutory damages ($50/unit under § 349), reducing a potentially larger aggregate award, and also awarded prejudgment interest.
Both parties appealed: Premier on liability, class certification, trial rulings, damages, and prejudgment interest; Montera on the cut to statutory damages. The Ninth Circuit affirmed in part, reversed in part, and remanded for reconsideration of statutory damages and prejudgment interest.

Issue	Plaintiff’s Argument	Defendant’s Argument	Held
Whether Joint Juice’s advertising was materially misleading under GBL § 349/350	Packaging claims were deceptive, unsupported by science, and led consumers to purchase a valueless product	Claims substantiated by industry studies; not misleading as a matter of law	Advertising was materially misleading to reasonable consumers; jury’s factual finding stands
Whether injury was properly established	Class members did not receive product as advertised, making purchase a cognizable injury	Only physical or price premium injuries count under GBL; full refund not available	Injury is cognizable if product fails to deliver promised benefit; class entitled to damages
Class certification and commonality of causation	Deception and injury were provable with common evidence, suitable for class action	Causation required individualized inquiry into reliance; class shouldn't be certified	New York uses an objective standard; class certification was proper; reliance not required
Statutory damages calculation (per unit or per person)	Statutory damages should apply per unit sold (per violation)	Damages only available per plaintiff, not per unit	Statutory damages apply per violation (per unit); supports deterrence goals
Prejudgment interest on statutory damages	Statutory damages are compensatory; interest proper	Statutory damages are penal, not compensatory; no interest	Prejudgment interest on statutory damages is error; not allowed in this case

Koch v. Acker, Merrall & Condit Co., 967 N.E.2d 675 (N.Y. 2012) (sets standard for cognizable claims under NY GBL §§ 349 and 350)
Oswego Laborers’ Loc. 214 Pension Fund v. Marine Midland Bank, N.A., 647 N.E.2d 741 (N.Y. 1995) (objective definition of misleading conduct under NY GBL)
Small v. Lorillard Tobacco Co., 720 N.E.2d 892 (N.Y. 1999) (defines cognizable injury under NY GBL)
Orlander v. Staples, Inc., 802 F.3d 289 (2d Cir. 2015) (recognizes that full refund for valueless product may be proper under NY GBL)
Stutman v. Chem. Bank, 731 N.E.2d 608 (N.Y. 2000) (distinguishes between reliance and causation under NY GBL)
Plavin v. Grp. Health Inc., 146 N.E.3d 1164 (N.Y. 2020) (expansive applicability of consumer protection statutes)
Karlin v. IVF Am., Inc., 712 N.E.2d 662 (N.Y. 1999) (broader reach of NY GBL in false advertising context)