Best Overall
Thorne
Creatine
8.9Excellent
NSF Certified for Sport creatine monohydrate: one ingredient, 5 g per scoop, tested for label accuracy and banned substances, at about $0.49 a serving.
NSF Sport
4 videos Shop$0.49/serving
Brand profile
Thorne
Thorne is a U.S. supplement maker founded in 1984 that sells through health-care practitioners, its own website and major retailers. It manufactures in its own facility in Summerville, South Carolina, and many of its products carry NSF certifications, including NSF Certified for Sport. In August 2026 Thorne announced a definitive agreement to be acquired by Procter & Gamble.
- Summerville, South Carolina, USA
- Founded 1984
- thorne.com
8.0
Average score
Across 6 products
Testing & quality
Many products are NSF Certified for Sport (listed in NSF's database); others carry NSF Contents Certified status. Thorne states it tests ingredients and finished products for identity, purity, potency and contaminants.
Thorne products we’ve reviewed
Thorne
Iron Bisglycinate
8.6Excellent
25 mg of chelated iron (Ferrochel bisglycinate) in a small, NSF Certified for Sport capsule; gentler than iron salts for most, but only for people who need iron.
NSF Sport
5 videosVitamins & Minerals
Trending
Thorne
Zinc Picolinate 15 mg
8.5Excellent
A small, NSF-certified 15 mg zinc picolinate capsule dosed near the RDA; TikTok-famous for skin anecdotes, and best paired with copper for long-term use.
NSF Contents
5 videosVitamins & Minerals
Thorne
Basic Nutrients 2/Day
8.2Good
Two-capsule, iron-free multi with active B vitamins and chelated minerals, NSF certified; trade-offs are a strong smell and B-vitamin doses far above the DV.
NSF SportNSF Contents
5 videos Shop$1.20/serving
Best Overall
6.9Mixed
NSF Contents Certified berberine in HCl and phytosome forms. Well made, but the average weight change in trials is about 2 lb and it interacts with many drugs.
NSF Contents
3 videos$1.47/serving
Thorne
Amino Complex
6.6Mixed
A well-balanced, NSF Certified for Sport EAA formula with 1.25 g leucine per scoop, but only about 4 g of amino acids for roughly $1.73 a serving.
NSF Sport
2 videos$1.73/serving
Video reviews