Reishi: Research · Nutrient Desk

What does immune support mean in the trials?

A Cochrane review included five trials with 373 cancer patients. Some immune-cell measures and quality-of-life scores improved, but study quality was poor and no trial measured long-term survival. These are preliminary findings in cancer care, not evidence that healthy people will catch fewer infections. 1

Immune SupportToo little evidence

Immune-marker changes warrant further study but do not establish general infection protection. 1

Does it improve blood pressure?

A separate Cochrane review could analyze three trials with 157 people with type 2 diabetes. Across 12 to 16 weeks, it found no significant blood-pressure benefit and no convincing improvement in glucose or cholesterol. 2

Blood pressureNot supported

The analyzed diabetes trials did not improve blood pressure. 2

What does newer research add?

A 2025 synthesis of 17 trials with 971 participants also found no significant overall blood-pressure or inflammatory-marker effect. An antioxidant enzyme, glutathione peroxidase, increased, but several other oxidative-stress markers did not change. All outcomes had very low-certainty evidence. 3

Oxidative stressMixed

One antioxidant-enzyme finding was favorable, while other markers were unchanged; clinical relevance remains uncertain. 3

Effects by health goal

Open an effect to see the studies behind its rating. Bars show the size of the effect; the letter grades the evidence.