Shiitake (Lentinula edodes)
The world's most popular culinary mushroom. Contains lentinan — a beta-glucan that's a licensed cancer adjunct in Japan — plus eritadenine, a natural cholesterol-lowering compound.
Strong for lentinan as cancer-therapy adjunct (Japanese trials in gastric, colorectal cancer). Moderate for cholesterol reduction (eritadenine), immune modulation, antiviral effects. Effects: 4–12 weeks.
Shiitake (Lentinula edodes) is the second most-consumed mushroom globally and a cornerstone of Japanese cuisine and medicine. Its two distinct bioactives matter: lentinan (a beta-glucan that's been used clinically alongside chemotherapy in Japan since 1985) for immune modulation and cancer adjunct, and eritadenine for cholesterol management. Also a good food source of vitamin D2 (when sun-exposed), B vitamins, and copper. Eating shiitake regularly is one of the highest-impact food choices for general immune and cardiovascular support.
- Form
- Dual-extract from fruiting body standardised to beta-glucans. AHCC is a closely related shiitake-mycelium extract (separate entry). Fresh or dried shiitake — vitamin D2 content significantly higher in sun-dried mushrooms.
- Dose
- 1,000–3,000 mg/day extract. Food: 100–200 g fresh shiitake several times a week.
- Timing
- With food. Anytime.
- Schedule
- Daily.
- Side effects
- Generally well-tolerated. Shiitake dermatitis — a streaky rash from undercooked shiitake (lentinan-related). Cook thoroughly. Mild GI upset, photosensitivity rare.
- Interactions
- Anticoagulants — mild additive. Immunosuppressants — opposing. Generally clean.
- Contraindications
- Mushroom allergy. Active autoimmune disease (relative — immune-stimulating). Bleeding disorders.
- Lab markers
- Lipid panel if used for cholesterol. Vitamin D if relying on sun-dried shiitake as a D source.
- Food sources
- Fresh shiitake (widely available), dried shiitake (umami-rich for stocks and braises). Sun-drying briefly before use significantly boosts vitamin D2 content.
Pairs with
Other functional mushrooms (reishi, lion's mane, cordyceps, maitake — synergistic blends). Vitamin C, zinc (immune cofactors).
within Mushrooms