Berberine Supplement Under Fire: Is Dosage a Deception?

Case Overview: A class action lawsuit claims Finest Vitamins, LLC (Nutriflair) falsely marketed its Premium Berberine+ with Ceylon Cinnamon as containing 1200 milligrams of berberine per serving, when testing allegedly revealed much lower amounts.

Consumers Affected: California consumers and those in states with similar consumer protection laws who purchased Nutriflair Premium Berberine+ with Ceylon Cinnamon.

Court: U.S. District Court for the Central District of California

A popular dietary supplement marketed as containing 1200 milligrams of berberine per serving is facing a class action lawsuit that claims it actually contains a fraction of that amount. 

Finest Vitamins, LLC, the company behind Nutriflair Premium Berberine+ with Ceylon Cinnamon is accused of deceptive marketing and mislabeling that led consumers to overpay for a product that didn’t deliver on its core promise.

Nutriflair Accused of Misleading Berberine Dosage

The lawsuit was filed by Christian Campos, a California resident who bought the supplement on Amazon in April 2025. Campos said he was drawn in by the product’s bold front-label claims promising “1200 MG PER SERVING” of berberine. 

But after testing the capsules himself and reviewing other lab results, he discovered the supplement contained significantly less—closer to 129 mg per serving, in some cases as little as 170 mg. He argues that had he known the true dosage, he either wouldn’t have purchased the product or would have paid much less.

Campos says the misleading label has not only cost him money but left him unsure whether he can trust the brand’s products in the future. The complaint argues that without a court-ordered injunction to stop the labeling practice, customers like Campos will continue to be misled and pay a premium for a supplement that doesn’t meet its claims.

Consumer's Tests Reveal Significant Gaps

Berberine is widely marketed for its ability to help regulate blood sugar and promote weight loss, which has fueled a recent surge in popularity across social media and wellness circles. 

But lab tests cited in the lawsuit show that Nutriflair’s product doesn’t contain anywhere near the advertised dosage, potentially violating FDA and California regulations requiring supplements to meet the full amount listed on their labels.

The lawsuit seeks class action status to allow others who purchased the supplement in the past 10 years to join, as well as $10 million in damages, legal costs, and a court injunction barring the company from continuing the labeling practice.

Supplement Industry Faces Mounting Legal Issues

Nutriflair isn’t the only brand facing scrutiny over exaggerated claims. Procter & Gamble is being sued over its ZzzQuil PURE Zzzs melatonin sleep aids, which are marketed as “natural” despite containing synthetic ingredients. 

Meanwhile, Lemme—a wellness brand backed by Kourtney Kardashian Barker—faces a lawsuit claiming its appetite-suppressing “GLP-1 Daily” capsules have no ingredients proven to deliver the promised effects.

Other lawsuits have targeted supplement companies over similar dosage and labeling issues. Force Factor is in court over allegedly misleading melatonin dosage claims, and Costco is defending itself against allegations its Kirkland Signature fish oil supplements overstated heart-health benefits.

In his lawsuit against Finest Vitamins, LLC, Campos wants to represent anyone in California or states with similar consumer protection laws who purchased the supplements. 

Case Details

• Lawsuit: Campos v. Finest Vitamins, LLC
• Case Number: 2:25-cv-06168 
• Court: U.S. District Court for the Central District of California

Plaintiffs' Attorneys

• Benjamin Heikali and Katherine Phillips (Treehouse Law, LLP) 
• Melissa S. Weiner and Ryan T. Gott (Pearson Warshaw, LLP)

Do you use berberine supplements? Share your thoughts on dosage accuracy below.