Wani gwaji da aka yi don tantance kariyar gurbacewar iska ya gano abin mamaki game da carnosine da kwakwalwa. A tsakanin manya masu shekaru 23 zuwa 35, shan gram 2 a kowace rana na tsawon makonni 12 ya nuna karuwar saurin tunani da inganci, yayin da manya masu shekaru 36 da sama ba su ga ci gaba ba. Wannan sakamakon ya samo asali ne daga nazari na baya‑bayan nan na rukunin mutane a gwajin NEAT, inda aka kwatanta carnosine da beta‑alanine, tare da tattaunawa kan wanene ya kamata ya kula da sakamakon.
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