PlainVitamins

Thyrosol

by Metagenics · capsule · 90 capsules

  • On the market (NIH)
  • UPC 7 55571 94997 4
  • DSLD label 216233
  • Serving 1 vegetarian capsule
  • 90 servings

Thyrosol by Metagenics lists 11 ingredients, 11 with an amount per serving of 1 vegetarian capsule, such as 300 mcg of vitamin A, 8.3 mcg (332 IU) of vitamin D, 44.7 mg of vitamin E and 2 mg of riboflavin. Its current label entered the NIH Dietary Supplement Label Database on March 24, 2020.

What is in Thyrosol?

Each row as the label prints it, per serving of 1 vegetarian capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Thyrosol: Supplement Facts rows against the market (DSLD label 216233, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Aas Retinyl PalmitateVitamin A (Form: as Retinyl Palmitate)300 mcg33%
Vitamin Das CholecalciferolVitamin D (Form: as Cholecalciferol) Note: 333 IU8.3 mcg (332 IU)42%Vitamin D in Thyrosol against 14,175 products8.3 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg8.3 mcg

80% of 14,175 products listing vitamin D give more (median 15 mcg). Per day at the most servings: 24.9 mcg.

Vitamin Eas D-Alpha-Tocopheryl SuccinateVitamin E (Form: as D-Alpha Tocopheryl Succinate)44.7 mg298%
Riboflavin2 mg154%Riboflavin in Thyrosol against 9,824 products2 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg2 mg

60% of 9,824 products listing riboflavin give more (median 4 mg). Per day at the most servings: 6 mg.

Niacinas NiacinamideNiacin (Form: as Niacinamide)3 mg19%Niacin in Thyrosol against 12,413 products3 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg3 mg

95% of 12,413 products listing niacin give more (median 20 mg). Per day at the most servings: 9 mg.

Iodineas Potassium IodideIodine (Form: as Potassium Iodide)50 mcg33%Iodine in Thyrosol against 6,382 products50 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg50 mcg

81% of 6,382 products listing iodine give more (median 150 mcg). Per day at the most servings: 150 mcg.

Magnesiumas Magnesium CitrateMagnesium (Form: as Magnesium Citrate)33 mg8%Magnesium in Thyrosol against 14,003 products33 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg33 mg

74% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 99 mg.

Zincas Zinc CitrateZinc (Form: as Zinc Citrate)6.7 mg61%Zinc in Thyrosol against 13,186 products6.7 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg6.7 mg

69% of 13,186 products listing zinc give more (median 11 mg). Per day at the most servings: 20.1 mg.

Seleniumas SelenomethionineSelenium (Form: as Selenionethionine)50 mcg91%Selenium in Thyrosol against 7,658 products50 mcg per serving; the middle half of products list 27 mcg to 100 mcg, the median 55 mcg.DV 55 mcgUL 400 mcg50 mcg

56% of 7,658 products listing selenium give more (median 55 mcg). Per day at the most servings: 150 mcg.

Myo-Inositol200 mgInositol in Thyrosol against 4,042 products200 mg per serving; the middle half of products list 10 mg to 80 mg, the median 30 mg.200 mg

Higher than 88% of 4,042 products listing inositol (median 30 mg). Per day at the most servings: 600 mg.

Rhodiola (Rhodiola rosea L.) rhizome extractas Rosavins, SalidrosideRhodiola (Rhodiola rosea L.) rhizome extract (Form: standardized to (1.33 mg) 1% Salidroside, and (3.99 mg) 3% Rosavins) PlantPart: rhizome Genus: Rhodiola Species: rosea Classifier: L.133 mgRhodiola in Thyrosol against 945 products133 mg per serving; the middle half of products list 50 mg to 250 mg, the median 100 mg.133 mg

Higher than 56% of 945 products listing rhodiola (median 100 mg). Per day at the most servings: 399 mg.

Source: NIH ODS Dietary Supplement Label Database, label 216233 (entered March 24, 2020), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • 95% of the 12,413 products that print an amount of niacin list more than its 3 mg of niacin (median 20 mg).

The NIH database records 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Thyrosol's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions: Take one capsule three times daily with food or as directed by your healthcare practitioner.
Warnings
Warning: Excess vitamin A intake may be toxic and may increase the risk of birth defects. Pregnant women and women who may become pregnant should not exceed 3,000 mcg of preformed vitamin A (retinyl palmitate) per day.
Caution: Not recommended for pregnant or nursing women. If taking medication, consult your healthcare practitioner before use.
Keep out of the reach of children.
Tamper evident: Do not use if safety seal is missing or broken.
Allergens and what it does not contain
This product is non-GMO and gluten-free.
Storage
Storage: Keep tightly closed in a cool, dry place.

Source: label statements in DSLD label 216233.

What else is on the label?

Other ingredients: Capsule, Microcrystalline Cellulose, Magnesium Stearate, Silica.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GF Certified Gluten-free. Listed with: Certified gluten-free (GFCO) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does Thyrosol have?

4 labels are on file under this name since November 25, 2013: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 216233 (current) Entered March 24, 2020 · on the market · 90 capsules · UPC 7 55571 94997 4
  2. Label 209782 Entered December 22, 2019 · off the market December 27, 2019 · 90 capsules
  3. Label 27845 Entered November 25, 2013 · on the market · 60 tablets · UPC 7 55571 02925 6
  4. Label 27844 Entered November 25, 2013 · on the market · 180 tablets · UPC 7 55571 91023 3

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Metagenics (manufacturer), Gig Harbor, WA. All Metagenics products.

Where next?