Cutting Back on One Amino Acid Increases Lifespan in Middle-Aged Mice Up to 33% https://www.sciencealert.com/cutting-back-on-one-amino-acid-increases-lifespan-in-middle-aged-mice-up-to-33 The researchers think restricting isoleucine in humans, either by diet or pharmaceutical means, has the potential to yield similar anti-aging effects