I tried three different reishi products. I can say that Aloha's reishi are good as an adaptogen, they improve immunity. I took three in the morning with a source of vit C (it improves reishi absorbtion). There were no adverse reactions such as insomnia etc. I felt better. If you need something to improve your fatigue or seasonal well-being, it is good. I would give it 4 stars for potency.