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L-Histidine
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L-Isoleucine
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L-Leucine
A French chemist once boiled wool and "petrified cheese" and found a gleaming white crystal. Two centuries later, that same crystal—L-leucine—can tell your...
L-Lysine
Picture a village bakery at dawn. Flour dust hangs in the air. Weeks later, villagers report feeling less on edge. What changed wasn't a new counselor or a...
L-Methionine
You're told to eat your protein because it contains essential amino acids—yet, in labs around the world, scientists extend lifespan in animals by dialing one...