GNC

Independent lab test review of two GNC products: Melatonin Supplements / Apple Cider Vinegar.

GNC Melatonin Tablets 3mg with Vitamin B6

Rating:

A+

Low dosage capsules | Claims: 3mg Melatonin & Vitamin B6

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GNC Apple Cider Vinegar Effervescent Tablets

Previously Rated:

B+

Liquid Form | Claims: 5% Acidity

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How We Rated GNC

As of Nov 2026, Unbox Health has independently lab tested and rated 2 GNC products across Melatonin Supplements, Vitamin B6, Apple Cider Vinegar: 1 out of 2 were rated A or A+.

We bought every GNC product from the open market, with no brand involvement. Each GNC product was third-party tested at up to 3 NABL-accredited, FSSAI-approved labs and rated D to A+ on their label accuracy, toxicity and nutrition profile (for foods).

GNC had no influence on the product ratings. All ratings stay valid for only 12 months, and all lab reports are published on GNC’s product pages.