A form of selenium
Selenomethionine supplements
3,041 selenium products in the NIH label database list selenium as selenomethionine (38% of the 7,934 selenium products); their median is 70 mcg of selenium per serving, against 55 mcg across all selenium products; the 69 whose only supplement ingredient is selenium list a median of 200 mcg (DSLD version 9.4.0, January 2026).
How does selenomethionine compare with the other forms?
The median amount of selenium per serving in products naming each form; the count in brackets. The amount is the selenium the label gives, as printed (the Supplement Facts row normally states the element; a row named as the compound usually gives the compound's weight and is left out of these figures).
Median selenium per serving by form
Source: Supplement Facts rows and their forms, NIH ODS Dietary Supplement Label Database version 9.4.0, current labels.
- Products
- 3,0412,061 on the market
- Median selenium per serving
- 70 mcgall selenium products: 55 mcg
- Share of selenium products
- 38%3,041 of 7,934
Is the amount the selenium or the whole selenomethionine?
A Supplement Facts row normally states the selenium itself (a row like "Selenium (as selenomethionine)"); a row named as the compound (a row like "Selenomethionine") usually states the compound's weight, which includes what the selenium is bound to and is larger than the selenium it supplies. The front of a bottle may print either. Of the 3,041 products here, 2,913 give the selenium in its own row (35 of them an amount far outside what other labels list, or one their own %DV disagrees with); 128 give no amount of their own or one in another unit.
The adult Tolerable Upper Intake Level for selenium is 400 mcg a day; it covers total intake from food, water and supplements. At the most servings their labels direct, 26 of the 2,877 selenomethionine products with a plausible amount (0.9%) give more than that.
Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; upper limit: Institute of Medicine Dietary Reference Intakes (2011) (what counts as plausible).
What else do these products contain?
| Ingredient | Share of these products | Median here | Median, all products |
|---|---|---|---|
| Zinc | 84% | 15 mg | 11 mg |
| Vitamin C | 78% | 180 mg | 100 mg |
| Vitamin E | 76% | 50 IU | 30 IU |
| Vitamin B6 | 72% | 10 mg | 6 mg |
| Vitamin A | 71% | 5,000 IU | 4,000 IU |
| Magnesium | 70% | 100 mg | 86 mg |
| Vitamin B12 | 70% | 50 mcg | 36 mcg |
| Riboflavin | 69% | 10 mg | 4 mg |
| Folate | 69% | 400 mcg | 400 mcg |
| Niacin | 68% | 25 mg | 20 mg |
Which products are they?
60 of the 3,041 (on-market products first, the newest label first), ordered by the amount of selenium per serving, largest first; an amount that looks like a slip or a compound's weight comes last, marked.
- Energy & MetabolismGNC Mega Men200 mcg
- Sport MultivitaminGNC Mega Men200 mcg
- Women's Golden MultivitaminSolaray200 mcg
- Multivitamin & Mineral Complex Natural Mango FlavorCountry Life200 mcg
- Multivitamin 50 PlusGNC Women's200 mcg
- Prostate Therapy ComplexMason Natural200 mcg
- Selenium 200 mcgNumber One Nutrition200 mcg
- Selenium 200 mcgThorne200 mcg
- ConceptionXR Motility Support TabletsTheralogix200 mcg
- Mega MenGNC Mega Men200 mcg
- Multivitamin Energy & MetabolismGNC Women's200 mcg
- Telomere SupportCountry Life Ageless Theory200 mcg
- Alive! Max3 Potency Adult Complete Multivitamin Tablets with IronNature's Way158 mcg
- Daily 1SuperSmart150 mcg
- Total Cleanse RespiratorySolaray150 mcg
- Dry E - 500 IUDr. Wong's Essentials125 mcg
- Bio E 268 mg + SeleniumSolaray100 mcg
- Liver ProtectXYMOGEN100 mcg
- Max for Women Iron FreeCountry Life100 mcg
- A.m.Thorne100 mcg
- ACES+ZnCarlson100 mcg
- Immuno CompleteHerbal Nutrition100 mcg
- Mineral ComplexBioCare100 mcg
- Multi-Vitamin Elite P.M.Thorne100 mcg
- P.m.Thorne100 mcg
- Selenium 100 mcgCountry Life100 mcg
- ThyrocsinThorne100 mcg
- Longevity+GenuinePurity100 mcg
- Natural Thyro FormulaSuperSmart100 mcg
- Total Balance Women's PremiumXtendlife100 mcg
- Total Mins Iron-free with Boron and Vitamin DCountry Life Target-Mins100 mcg
- Vision SupportAltrum100 mcg
- Multivitamin Soft Chews Very CherryCelebrate70 mcg
- Women's Fermented MultivitaminCodeage70 mcg
- Beauty TonicCodeage70 mcg
- Men's Fermented MultivitaminCodeage70 mcg
- Male Fertility SupportWholesome Story55 mcg
- Liver Health & DetoxSNAP55 mcg
- Mega 75Windmill55 mcg
- Multiminerals & BoronBluebonnet55 mcg
- Multiminerals & Boron Iron-FreeBluebonnet55 mcg
- Babe BalanceBabe by Bucked Up55 mcg
- Mega Multi MineralSolaray50 mcg
- Special Two Multi VitaminBaar Nature's Blessing50 mcg
- Thyro-CNV (K-9)Apex Energetics50 mcg
- Thyroid EnergyBaar Nature's Blessing50 mcg
- Thyroid SelectMoss Nutrition50 mcg
- Air DefenseNOW50 mcg
- Teen Fermented Multivitamin+Codeage40 mcg
- SuperBoost Antioxidant ShotArbonne35 mcg
- Doc's Best Multivitamin PlusDr. Ron's Ultra-Pure33 mcg
- Women's Complete MultivitaminNoor Vitamins30 mcg
- Multi-VitaminBaar Nature's Blessing25 mcg
- Collagen Beauty Booster Strawberry LemonadeHerbalife Skin21 mcg
- Electrolyte Supreme Fruit PunchJigsaw Health18 mcg
- Electrolyte Supreme Berry-LiciousJigsaw Health18 mcg
- QUICKMASS Chocolate Peanut ButterALLMAX12 mcg
- QUICKMASS VanillaALLMAX12 mcg
- Antioxidant SelectMoss Nutrition1.5 mcg (possible slip)
- Sun ProtectSignature Supplements20,000 mcg (possible slip)
Source: NIH ODS Dietary Supplement Label Database version 9.4.0; the form each label names for its row. Daily Values: the FDA's Daily Value page.
Which brands make them?
Nature's Plus (105), Nature's Way (84), Thorne Research (47), Pure Encapsulations (47), NOW (41), Integrative Therapeutics (40), Thorne (39), Rainbow Light (38), Douglas Laboratories (38), Carlson (35).