PlainVitamins

Thyroid Strength

by MegaFood · tablet or pill · 90 tablets

  • On the market (NIH)
  • UPC 0 51494 20029 2
  • DSLD label 327581
  • Serving 2 tablets
  • 45 servings

Thyroid Strength by MegaFood lists 8 ingredients, 8 with an amount per serving of 2 tablets, such as 150 mcg of iodine, 8 mg of zinc, 70 mcg of selenium and 0.35 mg of copper. Its current label entered the NIH Dietary Supplement Label Database on April 24, 2025.

What is in Thyroid Strength?

Each row as the label prints it, per serving of 2 tablets. 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).

Thyroid Strength: Supplement Facts rows against the market (DSLD label 327581, January 2026 release)
IngredientAmount% DVAmong products listing it
Iodineas Iodine Glycinatefermented iodine glycinate150 mcg100%Iodine in Thyroid Strength against 6,382 products150 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg150 mcg

15% of 6,382 products listing iodine give more (median 150 mcg).

Zincas Zinc Bisglycinatefermented zinc bisglycinate8 mg73%Zinc in Thyroid Strength against 13,186 products8 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg8 mg

60% of 13,186 products listing zinc give more (median 11 mg).

Seleniumas Selenium Glycinatefermented selenium glycinate70 mcg127%Selenium in Thyroid Strength against 7,658 products70 mcg per serving; the middle half of products list 27 mcg to 100 mcg, the median 55 mcg.DV 55 mcgUL 400 mcg70 mcg

Higher than 52% of 7,658 products listing selenium (median 55 mcg).

Copperas Copper Bisglycinatefermented copper bisglycinate0.35 mg39%Copper in Thyroid Strength against 6,468 products0.35 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg0.35 mg

83% of 6,468 products listing copper give more (median 1 mg).

L-Tyrosine300 mgTyrosine in Thyroid Strength against 1,680 products300 mg per serving; the middle half of products list 150 mg to 989 mg, the median 500 mg.300 mg

59% of 1,680 products listing tyrosine give more (median 500 mg).

Holy Basil Leaf Extractas Ocimum sanctum Leaf Extract250 mgHoly Basil in Thyroid Strength against 387 products250 mg per serving; the middle half of products list 50 mg to 400 mg, the median 129 mg.250 mg

Higher than 64% of 387 products listing holy basil (median 129 mg).

Sensorilas Ashwagandha Leaf, Root Extract10% withanolides250 mgAshwagandha in Thyroid Strength against 1,646 products250 mg per serving; the middle half of products list 125 mg to 500 mg, the median 250 mg.250 mg

42% of 1,646 products listing ashwagandha give more (median 250 mg).

Coleus forskohlii Root Extract150 mgColeus in Thyroid Strength against 303 products150 mg per serving; the middle half of products list 73.5 mg to 250 mg, the median 125 mg.150 mg

Higher than 59% of 303 products listing coleus (median 125 mg).

Source: NIH ODS Dietary Supplement Label Database, label 327581 (entered April 24, 2025), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records one serving 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 Thyroid Strength'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
Suggested Use: 2 tablets daily with a beverage. May be taken anytime throughout the day, even on an empty stomach.
Warnings
If pregnant, nursing, or you have a health condition, consult your healthcare practitioner before taking this product.
Keep out of reach of children.
Allergens and what it does not contain
Certified NSF Gluten-Free Dairy Free Soy Free Tested 125+ Pesticides & Herbicides Glyphosate Residue Free detoxfreeproject.org
Storage
Store tightly sealed in a cool place and avoid exposure to moisture. Once open, consume within three months.

Source: label statements in DSLD label 327581.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Brown Rice, Rice Protein, Autolyzed Yeast Extract, Yeast, Hypromellose, Silicon Dioxide, Stearic Acid, Guar Gum.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Vegetarian Certified NSF Gluten-Free Tested 125+ Pesticides & Herbicides OK (Kosher) Glyphosate Residue Free detoxfreeproject.org Certified B Corporation. Listed with: NSF certified (contents or GMP) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does Thyroid Strength have?

8 labels are on file under this name since March 25, 2015: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 327581 (current) Entered April 24, 2025 · on the market · 90 tablets · UPC 0 51494 20029 2
  2. Label 265230 Entered May 19, 2022 · off the market October 4, 2023 · 90 tablets · UPC 0 51494 20029 2
  3. Label 63421 Entered August 24, 2016 · off the market October 4, 2023 · 90 tablets · UPC 0 51494 20029 2
  4. Label 63420 Entered August 24, 2016 · off the market October 25, 2022 · 60 tablets · UPC 0 51494 20028 5
  5. Label 63417 Entered August 24, 2016 · on the market · 30 tablets · UPC 0 51494 20027 8
  6. Label 43533 Entered March 25, 2015 · off the market November 1, 2015 · 90 tablets · UPC 0 51494 20029 2
  7. Label 43532 Entered March 25, 2015 · off the market November 1, 2015 · 60 tablets · UPC 0 51494 20028 5
  8. Label 43531 Entered March 25, 2015 · off the market March 1, 2016 · 30 tablets · UPC 0 51494 20027 8

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

Who makes it?

The label names MegaFood (manufacturer), Manchester, NH. All MegaFood products.

Where next?