Flaxseed Lignans (SDG)
Heart health & metabolismFunction & benefits
Plant compounds (lignans) concentrated in flaxseed that act as mild plant oestrogens; a meta-analysis suggests flaxseed supplements support normal blood pressure, and a review points to a role for dietary lignans in supporting heart and blood vessel health.
Dosage & how to use
| Recommended dose | 100–300 mg of SDG extract daily |
| Best time to take | With food |
| Frequency | Once daily |
Best forms to choose
Flaxseed lignan extract standardised for SDG, or ground flaxseed.
Important warnings
Use with care with oestrogen-sensitive conditions (such as some breast tumours) unless under medical supervision
Avoid supplement doses during pregnancy and breastfeeding
Drug interactions
It may interfere with hormonal medicines and tamoxifen; take it two hours apart from other medicines if it contains flax fibre.
Related supplements
- Coenzyme Q10 (Ubiquinol/Ubiquinone)Heart health & metabolism
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- American Ginseng (Panax quinquefolius)Energy & adaptation
- White Mulberry Leaf Extract (DNJ)Metabolism & blood sugar
Scientific references
- Ursoniu S et al. Clin Nutr 2016 (meta-analysis) — PMID: 26071633
- Peterson J et al. Nutr Rev 2010 (review) — PMID: 20883417
Content last updated: 17 October 2026 · Based on published sources and research (EFSA / NIH / PubMed)
⚖️ Medical disclaimer: The information and data provided here are for health education and nutritional guidance only. They are not a medical diagnosis and never replace a direct consultation with your doctor or pharmacist. Always consult your doctor before starting any supplement, especially during pregnancy or breastfeeding or when taking long-term medication.