Reishi also extends lifespan, at least in mice. They got the best results with 175 mg Reishi/kg bodyweight. To get the human equivalent dose you have to divide that by 12.3 (Mice are small so they need a faster metabolism to maintain body temperature.), so a 70 kg human would need about a gram of ReishiMax. That contains 132 mg polysaccharides, 59 mg tripterpenes, and 150 mg cracked spores. Swanson's "Super Potent" Reishi has 120 mg polysaccharides, 80 mg triterpenes, and 200 mg cracked spores, which I figure is close enough. (Swanson also has a less sophisticated extract which I bought once by accident.)