Best for purity: Thorne Research
Thorne Research products have received certifications stating they meet manufacturing, purity, and potency standards from organizations such as the Therapeutic Goods Administration and NSF International.
The company claims its supplements are free from contaminants, heavy metals, and fillers.
Certification by these different organizations means that:
- athletes can use the more than 30 Thorne products NSF Certified for Sport with confidence that they contain all of what they should and none of what they should not
- Thorne’s manufacturing facilities, warehouses, and shipping centers have all passed inspection by the U.S. Food and Drug Administration (FDA)
- Thorne products, procedures, and manufacturing facilities meet the stringent standards of the Australian Department of Health Therapeutic Goods Administration
Thorne Research sells a range of vitamins and dietary supplements, including:
- multivitamins
- amino acids
- omega-3s
- probiotics
- sports supplements
Prices of multivitamins range from about $28–$66.
Best budget: Amazon Elements
Amazon Elements is a relatively new brand, and its products are available to buy online using an Amazon Prime account.
It claims its vitamins and supplements have undergone thorough testing, although they do not have USP verification.
The company also says that it manufactures its products in a facility in the U.S. that follows GMP guidelines. Each product has a COA accessible via QR labels on the packaging.
Amazon Elements offers a variety of products, including:
- multivitamins
- biotin
- iron
- prenatal
- omega-3s
Prices range from around $7–$39.