Would advise the reader to look up cell senescence and autophagy. If you do, you'll see the crucial role Fisetin plays. As far as I'm concerned, I won't buy another brand. Double Wood has one of the most comprehensive and thorough pipelines in the industry. On extremely rare occasions, I'll buy from another purveyor, because Double Wood simply doesn't carry it. If you're going to give these fine folks a try, go with their triple packs. You won't find a less expensive product on a per unit basis. As for quality, purity, product availability, competitive prices, customer service and fast shipping, you're not going to find a better company than Double Wood. Simple as that.