AFAIK all vitamins need to be made in fda approved facility.
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https://www.fda.gov/consumers/consumer-updates/fda-101-dietary-supplementsThe Law
The Federal Food, Drug, and Cosmetic Act (FD&C Act) was amended in 1994 by the Dietary Supplement Health and Education Act (often referred to as DSHEA), which defined “dietary supplement” and set out FDA’s authority regarding such products. Under existing law:
The FDA does NOT have the authority to approve dietary supplements for safety and effectiveness, or to approve their labeling, before the supplements are sold to the public.
Under the FD&C Act, it is the responsibility of dietary supplement companies to ensure their products meet the safety standards for dietary supplements and are not otherwise in violation of the law.
Dietary supplement labels are required to have nutrition information in the form of a Supplement Facts label that includes the serving size, the number of servings per container, a listing of all dietary ingredients in the product, and the amount per serving of those ingredients. They also must have a statement on the front of the product identifying it as a “dietary supplement” or similar descriptive term (e.g., “herbal supplement” or “calcium supplement”).
In general, even if a product is labeled as a dietary supplement, a product intended to treat, prevent, cure, or alleviate the symptoms of a disease is a drug, and subject to all requirements that apply to drugs.
