Agaricus blazei (Royal Sun mushroom)

Tier 3 — weak evidence · Immunity · Blood sugar · Cancer adjunct

A medicinal mushroom with modest immune-boosting effects. A 2024 review found it may enhance immune function when used alongside cancer treatment. Small trials also show reduced blood sugar in type 2 diabetes. Product quality and active ingredient content vary widely between brands. Evidence is insufficient for a strong recommendation at this time.

Dose: 500–1,500 mg/day standardised extract; evidence insufficient for strong recommendation