Thorne Siliphos
vs
Swanson Full Spectrum Milk Thistle
Supplement Comparison

  • Milk Thistle (Silybum marianum): Swanson Full Spectrum Milk Thistle has 5.6× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 2 nutrients compared
Bar chart: per-serving label amounts and listed forms for Thorne Siliphos vs Swanson Full Spectrum Milk Thistle.

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Frequently asked questions

Which active ingredients does Thorne Siliphos have?

  • Milk Thistle (Silybum marianum) appears as Silybin Phytosome

Which active ingredients does Swanson Full Spectrum Milk Thistle have?

  • Milk Thistle (Silybum marianum)

Which categories do Thorne Siliphos and Swanson Full Spectrum Milk Thistle belong to?

  • Herbal Extract

What health concerns do Thorne Siliphos and Swanson Full Spectrum Milk Thistle address?

  • Antioxidant Support
  • Liver & Detox Support

Which product has a higher amount of Milk Thistle (Silybum marianum) per serving?

  • Swanson Full Spectrum Milk Thistle has the highest total amount of Milk Thistle (Silybum marianum): 1000 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Thorne Siliphos: 1 capsule
    • Swanson Full Spectrum Milk Thistle: 2 capsules

Last updated: February 9, 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