Optimum Nutrition OPTI-MEN
vs
Metagenics Thyrosol
Supplement Comparison

  • Vitamin D: Optimum Nutrition OPTI-MEN has 20% more
  • Magnesium: Metagenics Thyrosol has 2.2× more
  • Zinc: Metagenics Thyrosol has 3.4× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 48 nutrients compared
Bar chart: per-serving label amounts and listed forms for Optimum Nutrition OPTI-MEN vs Metagenics Thyrosol.

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Frequently asked questions

Which active ingredients does Optimum Nutrition OPTI-MEN have?

  • Vitamin A
  • Vitamin C
  • Vitamin D
  • Vitamin E
  • Vitamin K
  • Vitamin B1 (Thiamin)
  • Vitamin B2 (Riboflavin)
  • Vitamin B3 (Niacin)
  • Vitamin B6 (Pyridoxine)
  • Vitamin B9 (Folate)
  • Vitamin B12 (Cobalamin)
  • Vitamin B7 (Biotin)
  • Vitamin B5 (Pantothenic Acid)
  • Alpha-Carotene
  • PABA
  • Calcium
  • Iodine
  • Magnesium
  • Zinc
  • Selenium appears as L-Selenomethionine
  • Chromium appears as Chromium nicotinate glycinate chelate
  • Molybdenum appears as Molybdenum A.A. chelate
  • Boron appears as Boron citrate
  • Vanadium appears as Vanadium citrate
  • Lutein
  • Lycopene
  • Inositol
  • Alpha Lipoic Acid
  • Zeaxanthin
  • Amino Men Blend by Optimum Nutrition
  • Phyto Men Blend by Optimum Nutrition
  • Viri Men Blend by Optimum Nutrition
  • Enzyme Blend by Optimum Nutrition
  • Cryptoxanthin

Which active ingredients does Metagenics Thyrosol have?

  • Vitamin A appears as Retinyl Palmitate
  • Vitamin D appears as Cholecalciferol (D3)
  • Vitamin E appears as d-Alpha Tocopheryl Succinate
  • Vitamin B2 (Riboflavin)
  • Vitamin B3 (Niacin) appears as Niacinamide
  • Iodine appears as Potassium Iodide
  • Magnesium appears as Magnesium Citrate
  • Zinc appears as Zinc Citrate
  • Selenium appears as L-Selenomethionine
  • Inositol appears as Myo-Inositol
  • Rhodiola Extract appears as Rhodiola Extract (standardized to 1% salidroside, 3% rosavins)

Which categories do Optimum Nutrition OPTI-MEN and Metagenics Thyrosol belong to?

  • Multivitamin
  • Hormone Support Formula

What health concerns do Optimum Nutrition OPTI-MEN and Metagenics Thyrosol address?

  • General Health
  • Men's Health
  • Thyroid Support

Which product has a higher amount of Vitamin D per serving?

  • Optimum Nutrition OPTI-MEN has the highest total amount of Vitamin D: 400 IU per serving

Which product has a higher amount of Magnesium per serving?

  • Metagenics Thyrosol has the highest total amount of Magnesium: 33 mg per serving

Which product has a higher amount of Zinc per serving?

  • Metagenics Thyrosol has the highest total amount of Zinc: 6.7 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Optimum Nutrition OPTI-MEN: 3 tablets
    • Metagenics Thyrosol: 1 capsule
  • Vitamin A
    • This supplement has 1500 mcg RAE
    • Recommended Dietary Allowance in men: 900 mcg RAE
    • Recommended Dietary Allowance in women: 700 mcg RAE
    • Tolerable Upper Intake Level: 3000 mcg RAE
  • Vitamin C
    • This supplement has 60 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin D
    • This supplement has 400 IU
    • Recommended Dietary Allowance in men: 600 IU
    • Recommended Dietary Allowance in women: 600 IU
    • Tolerable Upper Intake Level: 4000 IU
  • Vitamin E
    • This supplement has 100 mg
    • Recommended Dietary Allowance in men: 15 mg
    • Recommended Dietary Allowance in women: 15 mg
    • Tolerable Upper Intake Level: 1000 mg
  • Vitamin K
    • This supplement has 75 mcg
    • Adequate Intake in men: 120 mcg
    • Adequate Intake in women: 90 mcg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B1 (Thiamin)
    • This supplement has 1.5 mg
    • Recommended Dietary Allowance in men: 1.2 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • Vitamin A
    • This supplement has 300 mcg RAE
    • Recommended Dietary Allowance in men: 900 mcg RAE
    • Recommended Dietary Allowance in women: 700 mcg RAE
    • Tolerable Upper Intake Level: 3000 mcg RAE
  • Vitamin D
    • This supplement has 333 IU
    • Recommended Dietary Allowance in men: 600 IU
    • Recommended Dietary Allowance in women: 600 IU
    • Tolerable Upper Intake Level: 4000 IU
  • Vitamin E
    • This supplement has 44.7 mg
    • Recommended Dietary Allowance in men: 15 mg
    • Recommended Dietary Allowance in women: 15 mg
    • Tolerable Upper Intake Level: 1000 mg
  • Vitamin B2 (Riboflavin)
    • This supplement has 2 mg
    • Recommended Dietary Allowance in men: 1.3 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B3 (Niacin)
    • This supplement has 3 mg
    • Recommended Dietary Allowance in men: 16 mg
    • Recommended Dietary Allowance in women: 14 mg
    • Tolerable Upper Intake Level: 35 mg
  • Iodine
    • This supplement has 50 mcg
    • Recommended Dietary Allowance in men: 150 mcg
    • Recommended Dietary Allowance in women: 150 mcg
    • Tolerable Upper Intake Level: 1100 mcg

Last updated: February 18, 2026

  • Sources & Methodology: Nutrient data and forms are taken directly from Supplement Facts labels. Reviewed and standardized by the VIOscan Research Team. Learn more on the Methodology page.
  • We show the Recommended Dietary Allowance (RDA) when available. If no RDA exists, we show the Adequate Intake (AI). Tolerable Upper Intake Levels (UL) are used for upper limits. Unless otherwise noted, RDAs shown correspond to healthy adults aged 19–50 years and are sex-specific. Separate values exist for 51–70 years and >70 years, and pregnancy and lactation are excluded. All values come from the Dietary Reference Intakes (DRIs) published by the National Academies of Sciences, Engineering, and Medicine (NASEM), Food and Nutrition Board (FNB).
  • Transparency: We’re funded by our users. We don’t have sponsors or affiliate links, and we don’t sell supplements.
  • Editorial standards: we provide independent, impartial and objective data analysis.
  • This analysis is for educational purposes only. It is not a substitute for medical advice.
  • Questions? Read our Frequently Asked Questions or contact us, we’re here to help.
  • See an error? Report it through our Contact page.
  • Author: VIOscan Research Team