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Plant Sterols / Stanols — Frequently Asked Questions

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Frequently Asked Questions

Are plant sterols and stanols the same thing?

Plant sterols and stanols are closely related but slightly different. Stanols are saturated forms of sterols — they have a similar structure but are absorbed even less from the gut. Both effectively block cholesterol absorption, and clinical studies show comparable LDL-lowering effects. Most commercial products contain a mixture of both, often as esterified forms for better fat solubility.

Do plant sterols work if I am already taking a statin?

Yes, this is one of their biggest advantages. Statins work by reducing cholesterol production in the liver, while plant sterols block cholesterol absorption in the gut. These complementary mechanisms provide additive LDL reductions of 8-10% beyond statins alone. The AHA specifically recommends adding plant sterols for patients who need additional LDL lowering without increasing statin dose.

Should I worry about reduced vitamin absorption from plant sterols?

Plant sterols can modestly reduce absorption of fat-soluble vitamins (particularly beta-carotene and vitamin E) by 10-20%. This is generally manageable by eating a diet rich in colorful fruits and vegetables. If you take plant sterols long-term, consider an annual blood test for carotenoid and vitamin E levels, and take any fat-soluble vitamin supplements at a different meal than your sterols.

Full Plant Sterols / Stanols Guide

References

  1. (). LDL-cholesterol-lowering effect of plant sterols and stanols across different dose ranges: a meta-analysis of randomised controlled studies. British Journal of Nutrition. DOI
  2. (). Plant sterols/stanols as cholesterol lowering agents: a meta-analysis of randomized controlled trials. Food & Nutrition Research. DOI