It's because there are several factors at play that vary from person to person
Taurine Supplementation Increases Lifespan and Healthspan in Animals Randomized Controlled Trials of Taurine Supplementation in Humans Stay tuned for: The Best Daily Dose of Taurine Where to Find Taurine and the Best Source Like Beet Juice, Taurine Supplementation May Only Be Safe in the Context of a Plant-Based Diet For more on longevity, go to your local public library and check out my book, How Not to Age , available in print, e-book, and audio

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Food choices will also be important, and eating cant necessarily be a free-for-all
16, 17, 18 Strong and specific EYFP immunoreactivity was observed throughout the cerebellum (Figures 4a and b)