Forest Leaf Thyroid Support, 60 Vegetable Capsules supplement bottle
Forest Leaf

Thyroid Support, 60 Vegetable Capsules

What We Researched
9 active ingredients analyzed · 4 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
91
Product Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin B12 (as methylcobalamin) 100 mcg 4,167%
Iodine (from kelp) 400 mcg 267%
Zinc (as zinc oxide) 15 mg 136%
Selenium (as selenium amino acid chelate) 200 mcg 364%
Copper (as copper oxide) 2 mg 222%
Manganese (as manganese amino acid chelate) 2 mg 87%
Molybdenum (as molybdenum amino acid chelate) 75 mcg 167%
L-Tyrosine 300 mg **
Proprietary BlendAshwagandha Root, Coleus forskohlii Root Extract, Schizandra Fruit, Bladderwrack Algae, Cayenne Pepper Fruit 600 mg **
Bioavailability Very Good

Absorption Rating

  • Vitamin B12 (as methylcobalamin) Good
  • Iodine (from kelp) Good
  • Zinc (as zinc oxide) Poor
  • Selenium (as selenium amino acid chelate) Good
  • Copper (as copper oxide) Fair
  • Manganese (as manganese amino acid chelate) Good
  • Molybdenum (as molybdenum amino acid chelate) Good
  • L-Tyrosine Good
  • Proprietary BlendAshwagandha Root, Coleus forskohlii Root Extract, Schizandra Fruit, Bladderwrack Algae, Cayenne Pepper Fruit Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose (Capsule)
  • Vegetable Magnesium Stearate
  • Silicon Dioxide
  • Rice Flour
Efficacy Very Good

Dosage Analysis

  • Vitamin B12 (as methylcobalamin) 100 mcg Effective
  • Iodine (from kelp) 400 mcg High
  • Zinc (as zinc oxide) 15 mg Effective
  • Selenium (as selenium amino acid chelate) 200 mcg Effective
  • Copper (as copper oxide) 2 mg Effective
  • Manganese (as manganese amino acid chelate) 2 mg Effective
  • Molybdenum (as molybdenum amino acid chelate) 75 mcg Effective
  • L-Tyrosine 300 mg Under-dosed
  • Proprietary BlendAshwagandha Root, Coleus forskohlii Root Extract, Schizandra Fruit, Bladderwrack Algae, Cayenne Pepper Fruit 600 mg High

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B12 (as methylcobalamin) 100 mcg 4,167%
Iodine (from kelp) 400 mcg 267%
Zinc (as zinc oxide) 15 mg 136%
Selenium (as selenium amino acid chelate) 200 mcg 364%
Copper (as copper oxide) 2 mg 222%
Manganese (as manganese amino acid chelate) 2 mg 87%
Molybdenum (as molybdenum amino acid chelate) 75 mcg 167%
L-Tyrosine 300 mg **
Proprietary BlendAshwagandha Root, Coleus forskohlii Root Extract, Schizandra Fruit, Bladderwrack Algae, Cayenne Pepper Fruit 600 mg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose (Capsule) Safe

It is used as a material for making vegetarian capsules.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$20$19$18$17$16 Mar 12 $18.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Forest Leaf

Founded 2016 · Garden Grove, CA, USA (mailing address) & Brooklyn, NY, USA (returns address) · 31 products · forestleaf.com/

Transparency

1 claim
Third Party Testing Claim — Claimed Source
Related Supplements
Frequently Asked Questions
Is Forest Leaf Thyroid Support, 60 Vegetable Capsules a good supplement?

Forest Leaf Thyroid Support, 60 Vegetable Capsules received a product quality score of 91/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 9 active ingredients with 30 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives.

What are the ingredients in Forest Leaf Thyroid Support, 60 Vegetable Capsules?

Forest Leaf Thyroid Support, 60 Vegetable Capsules contains 9 active ingredients: Vitamin B12 (as methylcobalamin) (100 mcg), Iodine (from kelp) (400 mcg), Zinc (as zinc oxide) (15 mg), Selenium (as selenium amino acid chelate) (200 mcg), Copper (as copper oxide) (2 mg), Manganese (as manganese amino acid chelate) (2 mg), and 3 more. Notable high-dose ingredients include Vitamin B12 at 4,167% DV, Iodine at 267% DV, Selenium at 364% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Forest Leaf Thyroid Support, 60 Vegetable Capsules safe to take?

Forest Leaf Thyroid Support, 60 Vegetable Capsules has been analyzed for ingredient safety across all its components. All 4 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.