Other names for phytosterols

Beta-Sitosterol
Campesterol
Stigmasterol
Plant Sterols

Synopsis of phytosterols

Phytosterols, also known as plant sterols and stanols, are naturally occurring compounds found in the cell membranes of plants, structurally similar to cholesterol in animals. The most common phytosterols include beta-sitosterol, campesterol, and stigmasterol. They are abundant in vegetable oils, nuts, seeds, legumes, whole grains, and fortified foods.

Phytosterols are best known for their ability to lower LDL cholesterol levels. They work by competing with dietary and biliary cholesterol for absorption in the intestines, effectively reducing the amount of cholesterol that enters the bloodstream. This makes them a widely studied and FDA-recognized functional food component for cardiovascular health. Daily intakes of 1.5–3 grams have been shown to reduce LDL cholesterol by 7–12% without affecting HDL ("good") cholesterol or triglycerides.

Beyond heart health, certain phytosterols, especially beta-sitosterol, have been studied for their potential in supporting prostate health, modulating immune function, and exhibiting anti-inflammatory and anticancer properties. Beta-sitosterol in particular has shown promise in managing benign prostatic hyperplasia (BPH) and alleviating urinary symptoms.

Phytosterols are often included in cholesterol-lowering spreads, cereals, dairy products, and dietary supplements. They are also being explored for use in topical products due to their skin-soothing and barrier-protective qualities.

Historical Use in Medicine:
While phytosterols themselves were not chemically identified until the early 20th century, their benefits have been indirectly leveraged for centuries through the use of plant-based diets and medicinal herbs rich in sterol-containing oils and seeds.

In traditional African and Ayurvedic medicine, plants like saw palmetto, pumpkin seed, and stinging nettle—now known to contain significant levels of phytosterols—were used to treat urinary issues and support male reproductive health. Similarly, ancient diets high in whole grains, legumes, and seeds, such as those followed in the Mediterranean and Middle Eastern regions, offered natural protection against heart disease and inflammation, effects now partially attributed to phytosterol intake.

Beta-sitosterol was first isolated in the 1920s and gained traction in the 1950s and 60s for its cholesterol-lowering and prostate-supportive properties. With the rise of chronic heart disease in the late 20th century, phytosterols became a focus of clinical research and functional food innovation.

Phytosterols is used for these health conditions

Cancer (natural therapy for) (Scientific)
Cancer (prevention) (Scientific)
Cancer Treatment (reducing side effects) (Scientific)
Cardiovascular Disease (Scientific)
Cholesterol (high) (Scientific)

phytosterols is used to support these body systems

Arteries (Scientific)
Blood (Scientific)
Circulatory System (Scientific)
Heart (Scientific)
Intestinal System (Scientific)
Prostate (Scientific)

Products containing phytosterols

Metagenics Testralin®
Metagenics Wellness Essentials Men's Vitality Daily Packs