Home / EncyclopediaProducts / Beta-Sitosterol
Emollient

Beta-Sitosterol

Beta-Sitosterol — a plant sterol (phytosterol), a structural analog of cholesterol found in plant oils, nuts, and grains. It strengthens the skin's lipid barrier, exhibits anti-inflammatory properties, and is a key component of plant sterol complexes for anti-aging cosmetics.

phytosterolplant cholesterolanti-inflammatoryskin barrier
✓ Safe
Comedogenic Rating
0/5
Irritation Potential
0/5

What is it?

Beta-Sitosterol (INCI: Beta-Sitosterol) — a sterol alcohol (C₂₉H₅₀O). Structure: steroid skeleton + hydroxyl group at C-3 + unsaturation C5-C6 + ethyl group C-24. MW: 414.7 Da. Lipophilic molecule (soluble in oils, insoluble in water). Natural source in the skin: human sebum contains sterols, primarily cholesterol; plant sterols are structurally similar. Mechanism: incorporation into lipid membranes and barrier lamellae → modulation of their fluidity and order; anti-inflammatory effect through NF-κB inhibition.

Anti-aging products for mature skin, products for dry and damaged skin, anti-inflammatory products (rosacea, sensitive skin), natural cosmetics based on plant sterols.

Key Benefits

✦
Strengthening the lipid barrier — a plant analog of cholesterol
Beta-sitosterol is structurally similar to cholesterol — a key component of the lipid barrier SC (along with ceramides and fatty acids). Mechanism: incorporation into lipid lamellae between corneocytes → stabilization of lamellar structure → reduced TEWL. Cholesterol in SC: 25-33% of total lipid composition — critical for normal barrier function. In cases of cholesterol deficiency (aging, atopy): beta-sitosterol can partially compensate. Clinical observations: phytosterol complexes (beta-sitosterol + stigmasterol + campesterol) — improvement of barrier function and hydration.
◈
Anti-inflammatory properties — NF-κB inhibition
Beta-sitosterol exhibits anti-inflammatory activity through several mechanisms. Mechanism: partial inhibition of NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) → reduction of pro-inflammatory cytokine transcription (TNF-α, IL-1β, IL-6). Additionally: modulation of the prostaglandin pathway (partial COX-2 inhibition) → reduction of PGE2. Clinically: reduction of redness and itching with topical application. Effective for: rosacea-prone skin, sensitive skin, post-procedure recovery.
✧
Anti-aging effect and stimulation of collagen synthesis
Beta-sitosterol and phytosterol complexes demonstrate anti-aging effects in vitro and in vivo. Stimulation of collagen synthesis: fibroblasts — increased production of procollagen I upon treatment with beta-sitosterol. Mechanism: activation of TGF-beta-like pathway (SMAD3) → transcription of COL1A1. Protection against photoaging: antioxidant activity of the sterol ring → protection from UV-induced oxidative damage. Clinical data from avocado/plant extracts (beta-sitosterol as an active component): improvement of skin elasticity and turgor with 4-week application.

Suitable for

mature skindry and damaged skinsensitive and inflamed skin

Main Actions

✓ strengthening the lipid barrier as a cholesterol analog✓ anti-inflammatory action through NF-κB✓ anti-aging stimulation of collagen
Beta-Sitosterol: phytosterol mixtures in cosmetics

Beta-sitosterol is rarely used alone — usually as part of phytosterol mixtures (phytosterols complex). Typical mixture: beta-sitosterol (~35%) + campesterol (~25%) + stigmasterol (~20%) + brassicasterol (~15%). INCI: Phytosterols or Beta-Sitosterol. Effective concentration: 0.5-2% in complexes. Lipophilic — to be introduced into the oil phase. Natural sources in products: avocado oil, soybean oil, rapeseed oil (rich in phytosterols). Stable at pH 4-8, resistant to oxidation.

CategoryEmollients

Frequently Asked Questions

What does Beta-Sitosterol do for skin?
Anti-aging products for mature skin, products for dry and damaged skin, anti-inflammatory products (rosacea, sensitive skin), natural cosmetics based on plant sterols.
Who should use Beta-Sitosterol?
Beta-Sitosterol is suitable for: mature skin, dry and damaged skin, sensitive and inflamed skin.
Are there any warnings about Beta-Sitosterol?
Beta-sitosterol is rarely used alone — usually as part of phytosterol mixtures (phytosterols complex). Typical mixture: beta-sitosterol (~35%) + campesterol (~25%) + stigmasterol (~20%) + brassicasterol (~15%). INCI: Phytosterols or Beta-Sitosterol. Effective concentration: 0.5-2

Check if this ingredient works for your skin — analyze your full product formula for free.

Analyze your product