Legal status · United States
Is Selenium legal in the United States?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
Selenium can be sold in the United States as a supplement or cosmetic ingredient, classified as "Sold as a supplement". That is not drug approval: FDA has not evaluated any health claim, and injectable or "research use only" versions fall outside supplement rules, so that label does not make human use lawful. On the evidence, 1 human study is cited on its profile.
- People given it
- 35,533
- Found nothing
- 0
Classification
Sold as a supplement
FDA approval and compounding status, from the Selenium profile.
Reviewed Sep 2026. This is a classification, not legal advice.
A research-use-only label on a vial does not make human use lawful.
Selenium in the United States at a glance
| Classification | Sold as a supplement |
|---|---|
| FDA approval status | Sold as a dietary supplement. Not approved to prevent prostate cancer or to treat thyroid disease. |
| Human studies cited | 1 of 1 citations on the profile |
| Reviewed | Sep 2026 |
Classification and note come from the Selenium profile, checked against U.S. Food and Drug Administration (FDA) listings at the reviewed date.
What this means
- 01
Selenium can be sold in the United States as a supplement, food or cosmetic ingredient under the classification above, without drug approval.
- 02
Supplement status means FDA has not evaluated any health claim; manufacturers are responsible for safety and labeling, and quality varies by product.
- 03
Injectable or "research use only" versions are not supplements. That label does not make human use lawful, and injectables fall under medicines rules.
What Selenium is
SELECT randomised 35,533 men to selenium, vitamin E, both, or placebo and did not prevent prostate cancer. That is the honesty bar. Thyroid conversations exist and are clinician-owned. Do not stack selenium with iodine on a Hashimoto forum protocol.
Selenium is an essential trace element in selenoproteins, including glutathione peroxidases and deiodinases that handle thyroid hormone. That last fact is why it shows up next to TSH on this site.
Mechanism: Selenocysteine is inserted into selenoproteins. Glutathione peroxidase uses it to reduce peroxides.
Regulatory history: Sold as a dietary supplement. Not approved to prevent prostate cancer or to treat thyroid disease.
How FDA treats this kind of product
Approves prescription drugs by indication and polices unapproved products, including peptides sold online. Compounding pharmacies may prepare some compounds under a prescription when the FDA places them on a permitted bulk-substances category.
The classification above is the The Longevity Archive reading of U.S. Food and Drug Administration listings for Selenium at the reviewed date, not a legal opinion. Rules change, and importing, prescribing and possessing a compound can each be treated differently. Check the regulator directly before acting on anything here.
Selenium in other countries
Frequently asked questions
Is Selenium legal in the United States?
Selenium can be sold in the United States as a supplement or cosmetic ingredient, classified as "Sold as a supplement". That is not drug approval: FDA has not evaluated any health claim, and injectable or "research use only" versions fall outside supplement rules, so that label does not make human use lawful. On the evidence, 1 human study is cited on its profile.
Can I buy Selenium in the United States?
Yes, in supplement or cosmetic form. In the United States Selenium is classified as "Sold as a supplement", so oral, topical or cosmetic products can be sold under supplement rules. Injectable versions and products labeled "research use only" are not supplements and are not approved for human use.
Is Selenium FDA approved?
No. FDA status: Sold as a dietary supplement. Not approved to prevent prostate cancer or to treat thyroid disease.. Current US classification: "Sold as a supplement". On the evidence, 1 human study is cited on its profile.
Related compounds in the United States
Full research profile
Mechanism, cited studies, FDA status and the full legal summary for Selenium live on its compound profile.
Selenium profileThis page is general information about the regulatory status of Selenium in the United States, current as of Sep 2026. It is not legal advice, and classifications change; check U.S. Food and Drug Administration directly or consult a lawyer for a specific situation. Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use. The Longevity Archive has no vendor relationships and does not recommend where to buy anything.