sitosterol (β-sitosterol) is one of the most abundant phytosterols found widely in plants, nuts, seeds, vegetable oils, fruits, and legumes. structurally similar to cholesterol, sitosterol is known for its cholesterol-lowering properties and beneficial effects on prostate health, inflammation, and immune modulation
chemical properties
chemical formula: C₂₉H₅₀O
molecular weight: 414.71 g/mol
solubility: insoluble in water; soluble in fats, oils, and organic solvents
melting point: approximately 136–140°C
structure: steroid structure closely related to cholesterol with minor differences in side-chain
usefulness in medicine
effectively reduces ldl cholesterol levels by blocking cholesterol absorption in the intestines, significantly lowering cardiovascular disease risk
widely used for managing symptoms of benign prostatic hyperplasia (bph) and promoting prostate health
demonstrates anti-inflammatory effects, beneficial in conditions such as arthritis and autoimmune disorders
studied for anticancer potential, particularly against breast, prostate, and colon cancers
antimicrobial activity
sitosterol shows antimicrobial effects through immune enhancement, inflammation reduction, and direct inhibition of microbial growth and biofilm formation
bacteria:
fungi:
research highlights
cholesterol-lowering and cardiovascular benefits of sitosterol