NOW Foods L-OptiZinc
vs
NOW Foods Zinc
Supplement Comparison

  • Zinc: NOW Foods Zinc has 67% more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 4 nutrients compared
Bar chart: per-serving label amounts and listed forms for NOW Foods L-OptiZinc vs NOW Foods Zinc.

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Frequently asked questions

Which active ingredients does NOW Foods L-OptiZinc have?

  • Zinc appears as L-OptiZinc Monomethionine
  • Copper appears as Copper Bisglycinate

Which active ingredients does NOW Foods Zinc have?

  • Zinc appears as Zinc Gluconate

Which categories do NOW Foods L-OptiZinc and NOW Foods Zinc belong to?

  • Single Mineral

What health concerns do NOW Foods L-OptiZinc and NOW Foods Zinc address?

  • General Health
  • Immune System Support
  • Men's Health
  • Skin, Hair & Nail Health

Which product has a higher amount of Zinc per serving?

  • NOW Foods Zinc has the highest total amount of Zinc: 50 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • NOW Foods L-OptiZinc: 1 capsule
    • NOW Foods Zinc: 1 tablet
  • Zinc
    • This supplement has 30 mg
    • Recommended Dietary Allowance in men: 11 mg
    • Recommended Dietary Allowance in women: 8 mg
    • Tolerable Upper Intake Level: 40 mg
  • Copper
    • This supplement has 0.3 mg
    • Recommended Dietary Allowance in men: 0.9 mg
    • Recommended Dietary Allowance in women: 0.9 mg
    • Tolerable Upper Intake Level: 10 mg
  • Zinc
    • This supplement has 50 mg
    • Recommended Dietary Allowance in men: 11 mg
    • Recommended Dietary Allowance in women: 8 mg
    • Tolerable Upper Intake Level: 40 mg

Last updated: February 15, 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