Tested & trusted since 1984
Thorne applies scientific rigor, clinical expertise, and uncompromising standards to every product — so you can choose with confidence.
We’ve proven better is possible.
Our rigor
Our supplements go through four rounds of testing, ingredient validation, and trusted third-party certifications.
Our expertise
Decades of clinical experience drive product development, translating research into bioavailable formulations.
Our guidance
Build a routine that actually works for you based on personalized recommendations backed by scientific data.
Our community
Experience superior results guided by our researchers, physicians, athletes, and partners committed to scientific wellness.
Science is personal
Your health journey is as unique as you are. Build a routine that fits your goals.
Meet Taia, your personal AI wellness advisor
Clarity you can trust, from your very first conversation
#1 Best Seller
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Certified quality
Manufacturing excellence
Thorne has an exemplary record of compliance with standards set by the FDA.
Trusted certification
Thorne’s campus is certified by NSF, the “gold standard” for quality in dietary supplements.
Global recognition
Thorne has an A rating from Australia’s TGA, the toughest regulatory agency in the world.
GRMA certified
GRMA recognizes companies that go beyond the minimum requirements for good manufacturing practices.
Why Thorne? Explore more quality content
FAQ
What makes Thorne supplements high quality?
Thorne is committed to producing high-quality supplements through rigorous testing, selective and well-researched ingredient sourcing, and strict manufacturing standards. We avoid unnecessary additives, binders, and fillers that may interfere with nutrient absorption. To confirm the purity of our ingredients, the potency of our formulas, and the absence of all contaminants, we carry out a minimum of four rounds of testing on every product we manufacture. What’s more, our manufacturing and warehouse facilities are inspected and certified by independent, third-party organizations, ensuring compliance with current Good Manufacturing Practices (cGMP). You can read more about Thorne’s unparalleled quality standards here: https://www.thorne.com/quality.
Are Thorne supplements clinically tested and safe?
Thorne partners with clinical researchers and conducts clinical trials to support the efficacy of our ingredients and products. Our team of doctors and medical experts substantiate each ingredient in every formula we manufacture based on extensive clinical research and medical literature. At any given time, numerous Thorne products are being tested in clinical trials around the world. Our collaborations with independent researchers help us understand supplement interactions in the body while exploring new potential for our formulas. We invest in clinical research to pursue ever higher standards for supplement safety and efficacy.
Why are Thorne products more expensive than other supplements?
When it comes to the health of our customers, we never settle for “good enough.” Thorne’s products may be priced higher than some other supplements because of our commitment to quality at every step. We don’t simply meet the standard for excellence in dietary supplements – we set the standard. In addition to our ingredient sourcing and strict manufacturing standards, we invest in rigorous testing in our state-of-the-art in-house laboratories and in third-party certifications. Our commitment to quality at every level contributes to the overall value and reliability of our products for your health.
Where are Thorne supplements made and where are the ingredients sourced from?
Located in Summerville, South Carolina, Thorne manufactures supplements in the USA using globally sourced ingredients. When it comes to ingredient sourcing, we seek out only the highest-quality ingredients, selecting each one for its purity and effectiveness. We maintain oversight of each ingredient’s origin, providing us complete supply chain transparency. Some ingredients are derived from natural sources, some are fermented, and others are synthesized to be bio-identical and highly absorbable. Learn more about the ingredients we use here: https://www.thorne.com/ingredients
