mineral

Selenium supplements

Half of the 7,658 selenium supplements in the NIH label database that print an amount list 55 mcg or less per serving; the middle half list 27 mcg to 100 mcg, and 1 in 128 of the 7,541 with a plausible amount give more than the adult upper limit at the most servings their labels direct (DSLD version 9.4.0, January 2026). The 182 products whose only supplement ingredient is selenium list a median of 200 mcg, and 1 in 91 of them give more than the upper limit.

How much selenium do supplements contain?

The median product lists 55 mcg per serving. One in ten lists 16 mcg or less, one in ten 200 mcg or more. The amount printed most often is 200 mcg (1,155 products).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for selenium is 55 mcg (adults and children 4 and older). The median product gives 100% of it per serving; the 90th percentile 364%.

The adult Tolerable Upper Intake Level is 400 mcg a day (total intake from food, water and supplements). At the most servings their labels direct, 59 of the 7,541 products with a plausible amount (0.8%) give more than that from the supplement alone (what counts as plausible).

The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.

Which forms of selenium do labels name?

Selenomethionine is the form named most often: 3,041 of the 7,934 selenium products (38%), ahead of sodium selenate (709, 9%) and sodium selenite (660, 8%). A product naming two forms counts in both; the table below gives every form.

• Selenomethionine
• Sodium selenate
• Sodium selenite
• Selenium glycinate
• Selenium yeast

Which products list the most selenium?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

• Oligo SeleniumMBi Nutraceuticals900 mcg
• H2plxPriority One Nutritional Supplements800 mcg
• SkinRestoreHerbs SRA800 mcg
• Ultimate Selenium ConcentrateComplete H2O Minerals750 mcg
• Sports Blend Electrolite Liquid MineralsComplete H2O Minerals600 mcg
• Drink WiseVitinity500 mcg
• ViraGuardEquip400 mcg
• SeleniumZemvelo400 mcg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 70 mcg; those entered in 2025, 70 mcg.

In which products and brands?

Brands listing it most: Douglas Laboratories (221), Nature's Plus (173), Nature's Way (156), Bronson (68), New Chapter (63), Rainbow Light (62), Kirkman (60), MegaFood (56), XYMOGEN (56), NOW (56).

Every product listing selenium

7,934 products, A to Z by name (page 120 of 159), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Selenium 50 mcgAN Amazing Nutrition Amazing Formulas50 mcg
• Selenium 50 mcgWonder Laboratories50 mcg
• Selenium 50 mcgBronson50 mcg
• Selenium ACESwiss BioEnergetics50 mcg
• Selenium Chelate 50 mcgDouglas Laboratories50 mcg
• Selenium CitrateDaVinci Laboratories Of Vermont · off the market200 mcg
• Selenium CitrateDaVinci Laboratories200 mcg
• Selenium Complex 200 mcgSwanson · off the market200 mcg
• Selenium Complex TabletEsmond Natural200 mcg
• Selenium ConcentrateComplete H2O Minerals250 mcg as transcribed, likely a slip
• Selenium Cruciferate 200 mcgEcological Formulas200 mcg
• Selenium CWSGenestra Brands100 mcg
• Selenium Extra StrengthBRI Nutrition200 mcg
• Selenium Food ComplexNew Chapter Organics · off the market200 mcg
• Selenium Food ComplexNew Chapter · off the market200 mcg
• Selenium ForteAB American Biologics200 mcg
• Selenium GlycinateBluebonnet200 mcg
• Selenium Gold 200 mcgNutriGold · off the market200 mcg
• Selenium High Dose DropsNutriCology100 mcg
• Selenium High Dose Drops 100 mcgAllergy Research Group100 mcg
• Selenium MaxConfidence USA300 mcg
• Selenium PlusDouglas Laboratories200 mcg
• Selenium Pure 200 mcgPure Naturals200 mcg
• Selenium SolutionNutriCology100 mcg
• Selenium SolutionAllergy Research Group100 mcg
• Selenium SynergyJarrow Formulas200 mcg
• Selenium w/ Coconut OilDr. Seth's200 mcg
• Selenium Xtra 200 mcgSundown Naturals200 mcg
• Selenium Yeast 200 mcgHerbal Secrets200 mcg
• Selenium Yeast-Free 200 mcgCarlson · off the market200 mcg
• Selenium-ChelateNutri-West50 mcg
• Seleno MetKlaire Labs · off the market200 mcg
• Seleno Met 200 mcgKlaire Labs · off the market200 mcg
• Seleno-6 200 mcgSolgar200 mcg
• Seleno-6 50 mcgSolgar50 mcg
• Seleno-IodideOrtho Molecular Products100 mcg
• Seleno-MethionineDouglas Laboratories200 mcg
• SelenoExcellNatural Factors · off the market200 mcg
• SelenoExcell 200 mcgSwanson Ultra · off the market200 mcg
• SelenoExcell 200 mcgDr. Clark Store200 mcg
• SelenoExcell Selenium 200 mcgNatural Factors200 mcg
• SelenoExcell Selenium 200 mcgSwanson200 mcg
• SelenomaxVitabase200 mcg
• SelenomethionineThorne Research · off the market200 mcg
• SelenomethionineThorne · off the market200 mcg
• Selenomethionine 200 mcgNeurobiologix200 mcg
• Selinium 200 mcgNature's Way · off the market200 mcg
• SeMetAOR Advanced Orthomolecular Research Premium55 mcg
• SeMSC Selenium 200 mcgSwanson Ultra · off the market200 mcg
• SeMSC Selenium 200 mcgSwanson200 mcg

Where next?

• Check an amount of selenium
• Labels above the upper limit
• All ingredients