Source Naturals Tribulus Extract
vs
Metagenics HisSynergy
Supplement Comparison

  • Tribulus terrestris: Source Naturals Tribulus Extract has 3.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 6 nutrients compared
Bar chart: per-serving label amounts and listed forms for Source Naturals Tribulus Extract vs Metagenics HisSynergy.

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Frequently asked questions

Which active ingredients does Source Naturals Tribulus Extract have?

  • Tribulus terrestris appears as Tribulus Fruit Extract

Which active ingredients does Metagenics HisSynergy have?

  • Ashwagandha appears as Ashwagandha (Withania somnifera) Root 15:1 Extract standardized to 1% withanolides
  • Mucuna Pruriens (Velvet Bean) appears as Cowage (Mucuna pruriens) Seed Extract standardized to 20% levodopa
  • Tribulus terrestris appears as Tribulus (Tribulus terrestris) Fruit 10:1 Extract standardized to 40% saponins

Which categories do Source Naturals Tribulus Extract and Metagenics HisSynergy belong to?

  • Herbal Extract

What health concerns do Source Naturals Tribulus Extract and Metagenics HisSynergy address?

  • Men's Health
  • Sexual Health

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Source Naturals Tribulus Extract: 1 tablet
    • Metagenics HisSynergy: 1 capsule

Last updated: February 21, 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