Forest Leaf Thyroid Support for Women & Men with Iodine supplement bottle
Forest Leaf

Thyroid Support for Women & Men with Iodine

What We Researched
9 active ingredients analyzed · 4 inactive ingredients decoded · 1 retailer compared · Last updated: Mar 2026
90
Product Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin B12 (as methylcobalamin) 100.0 mcg
Iodine (from kelp) 400.0 mcg 267%
Zinc (as zinc oxide) 15.0 mg 136%
Selenium (as selenium in amino acid chelate) 200.0 mcg 364%
Copper (as copper oxide) 2.0 mg 222%
Manganese (as manganese (gluconate chelate)) 2.0 mg 87%
Molybdenum (as molybdenum (amino acid chelate)) 75.0 mcg 167%
L-tyrosine 300.0 mg
Proprietary Blend 600.0 mg
Bioavailability Very Good

Absorption Rating

  • Vitamin B12 (as methylcobalamin) Good
  • Iodine (from kelp) Good
  • Zinc (as zinc oxide) Poor
  • Selenium (as selenium in amino acid chelate) Good
  • Copper (as copper oxide) Fair
  • Manganese (as manganese (gluconate chelate)) Good
  • Molybdenum (as molybdenum (amino acid chelate)) Good
  • L-tyrosine Good
  • Proprietary Blend Fair
Other Ingredients Excellent

Fillers & Additives

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

Dosage Analysis

  • Vitamin B12 (as methylcobalamin) 100.0 mcg Effective
  • Iodine (from kelp) 400.0 mcg High
  • Zinc (as zinc oxide) 15.0 mg Effective
  • Selenium (as selenium in amino acid chelate) 200.0 mcg Effective
  • Copper (as copper oxide) 2.0 mg Effective
  • Manganese (as manganese (gluconate chelate)) 2.0 mg Effective
  • Molybdenum (as molybdenum (amino acid chelate)) 75.0 mcg Effective
  • L-tyrosine 300.0 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B12 (as methylcobalamin) 100.0 mcg
Iodine (from kelp) 400.0 mcg 267%
Zinc (as zinc oxide) 15.0 mg 136%
Selenium (as selenium in amino acid chelate) 200.0 mcg 364%
Copper (as copper oxide) 2.0 mg 222%
Manganese (as manganese (gluconate chelate)) 2.0 mg 87%
Molybdenum (as molybdenum (amino acid chelate)) 75.0 mcg 167%
L-tyrosine 300.0 mg
Proprietary Blend 600.0 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.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

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 $17.99
Target

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 for Women & Men with Iodine a good supplement?

Forest Leaf Thyroid Support for Women & Men with Iodine received a product quality score of 90/100 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 for Women & Men with Iodine?

Forest Leaf Thyroid Support for Women & Men with Iodine contains 9 active ingredients: Vitamin B12 (as methylcobalamin) (100.0 mcg), Iodine (from kelp) (400.0 mcg), Zinc (as zinc oxide) (15.0 mg), Selenium (as selenium in amino acid chelate) (200.0 mcg), Copper (as copper oxide) (2.0 mg), Manganese (as manganese (gluconate chelate)) (2.0 mg), and 3 more. Notable high-dose ingredients include Iodine at 267% DV, Selenium at 364% DV, Copper at 222% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Forest Leaf Thyroid Support for Women & Men with Iodine safe to take?

Forest Leaf Thyroid Support for Women & Men with Iodine 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.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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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.