Swanson Full Spectrum Grape Seed
vs
Douglas Laboratories Hair Growth+
Supplement Comparison

  • Grape (Vitis vinifera) Seed Extract: Swanson Full Spectrum Grape Seed has 2.5× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 9 nutrients compared
Bar chart: per-serving label amounts and listed forms for Swanson Full Spectrum Grape Seed vs Douglas Laboratories Hair Growth+.

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Frequently asked questions

Which active ingredients does Swanson Full Spectrum Grape Seed have?

  • Grape (Vitis vinifera) Seed Extract

Which active ingredients does Douglas Laboratories Hair Growth+ have?

  • Zinc appears as Zinc Gluconate
  • Green Tea appears as Green Tea Extract (Camellia sinensis leaf, standardized to 98% polyphenols and 45% EGCG)
  • Grape (Vitis vinifera) Seed Extract appears as Grape Seed Extract (Vitis vinifera, 90% polyphenols)
  • Taurine
  • Pea Shoot Extract appears as AnaGain Nu (pea shoot extract, Pisum sativum)

Which categories do Swanson Full Spectrum Grape Seed and Douglas Laboratories Hair Growth+ belong to?

  • Herbal Extract

What health concerns do Swanson Full Spectrum Grape Seed and Douglas Laboratories Hair Growth+ address?

  • Antioxidant Support
  • Heart & Cardiovascular Health
  • Skin, Hair & Nail Health

Which product has a higher amount of Grape (Vitis vinifera) Seed Extract per serving?

  • Swanson Full Spectrum Grape Seed has the highest total amount of Grape (Vitis vinifera) Seed Extract: 380 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Swanson Full Spectrum Grape Seed: 1 capsule
    • Douglas Laboratories Hair Growth+: 2 capsules
  • Zinc
    • This supplement has 15 mg
    • Recommended Dietary Allowance in men: 11 mg
    • Recommended Dietary Allowance in women: 8 mg
    • Tolerable Upper Intake Level: 40 mg

Last updated: February 19, 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.
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  • Author: VIOscan Research Team