Do plant-based foods help lower your cholesterol?
Several plant-based foods demonstrably lower LDL cholesterol, with the strongest effects seen for plant sterols, soluble fibre and the Portfolio diet. For the greatest benefit, combine all three.
Foods enriched with plant sterols or stanols have the strongest support. Plant sterols are natural substances found in plants that resemble cholesterol and reduce how much of it is absorbed in the gut. On average, they lower LDL cholesterol by around 0.55 mmol/L. The effect is greater at higher doses, and butter or margarine containing plant sterols works slightly better than bread or biscuits with the same addition.
Soluble fibre from oats, barley and psyllium (flea seed husk) lowers LDL by at least 0.20 to 0.40 mmol/L. The same applies to vegetable oils rich in unsaturated fats and low in saturated fats, such as rapeseed oil. Both categories have been rated as having strong evidence.
The Portfolio diet combines nuts, plant protein, soluble fibre and plant sterols. This produces an LDL reduction of 0.73 mmol/L on average, or around 17 percent, on top of an already healthy base diet. Blood pressure and an inflammation marker also fell, and the estimated ten-year risk of heart disease dropped noticeably.
People who eat a fully plant-based or vegetarian diet see LDL fall by an average of 0.30 mmol/L and total cholesterol by 0.34 mmol/L compared with an omnivorous diet. That effect was consistent across different ages, countries and health situations. Avocado lowers LDL and total cholesterol modestly: by an average of around 6 mg/dL for LDL (just under 0.20 mmol/L when converted). A higher intake or longer consumption appears to give a greater effect. Soy protein, flaxseed, almonds, walnuts, hazelnuts, legumes and green tea produce smaller but measurable reductions.
Do be aware of unfiltered coffee, such as French press. It raises LDL to a moderate or large degree, which is a well-established exception to the generally favourable picture of plant-based foods. Filtered coffee is not covered by this warning.
This answer draws on several large collections of studies involving people, including one collection that rated evidence quality using a standard scoring system, and a 2026 statement from the American College of Cardiology that brings together studies in people, long-term follow-up research and research into how these foods work in the body. For plant sterols, soluble fibre and the Portfolio diet, the evidence has been rated as high quality. For avocado, nuts, legumes and green tea, the evidence has been rated as moderate: the effects have been shown but are smaller and less consistent than for the strongest categories.