Hericenone B (Lion's Mane)

Hericenone B is a lipophilic (fat-soluble) phenolic bioactive compound isolated from the fruiting body of Hericium erinaceus (Lion's Mane mushroom). It is not a macronutrient source itself but rather a specialized secondary metabolite. Key details: **Chemical class:** Cyathane-type aromatic compound (geranyl-resorcinol derivative) with a molecular formula of approximately C₃₅H₅₂O₅ (MW ~552.8 g/mol). **Concentration in dried fruiting body:** Typically found at trace levels, estimated at 0.001–0.01% w/w of dried fruiting body (roughly 10–100 µg/g depending on strain, cultivation conditions, and extraction methods). **Associated bioactive co-compounds in Lion's Mane:** Hericenones A, C, D, E, F, G, H (all lipophilic, found in the fruiting body), and erinacines A–K (diterpenoids found primarily in the mycelium, also NGF-stimulating). The fruiting body matrix also provides: beta-glucans (20–40% of dry weight, primarily β-1,3/1,6-glucans with immunomodulatory activity), dietary fiber (approx. 30–40% dry weight), protein (15–25% dry weight, including all essential amino acids), ergothioneine (antioxidant amino acid, ~0.4–1.0 mg/g dry weight), ergosterol (provitamin D₂ precursor, ~2–6 mg/g dry weight), B-vitamins (notably niacin ~30–60 mg/100g, riboflavin ~1–2 mg/100g, thiamine ~0.1–0.2 mg/100g), minerals (potassium ~2000–3000 mg/100g dry, phosphorus ~600–900 mg/100g dry, zinc ~5–10 mg/100g dry, selenium ~1–5 µg/g dry), and polyphenolic antioxidants. **Bioavailability notes:** Hericenone B is lipophilic, so its absorption is significantly enhanced when consumed with dietary fats (co-administration with a lipid source can increase bioavailability by an estimated 2–5 fold). It can cross the blood-brain barrier due to its low molecular weight and lipophilicity, which is essential for its central nervous system effects (NGF stimulation occurs within brain tissue). Oral bioavailability data in humans is limited, but animal studies suggest sufficient CNS penetration at doses equivalent to 500–3000 mg of standardized Lion's Mane extract per day. Hot-water extractions primarily capture polysaccharides/beta-glucans, while dual extraction (hot-water + ethanol/alcohol) is necessary to efficiently extract hericenones. Standardized extracts typically guarantee hericenone content but rarely specify individual hericenone B concentrations; total hericenones in quality supplements range from 0.5–1.5% of extract weight.