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This vital nutrient is fundamental to DNA synthesis , the production of red blood cells, and the maintenance of the nervous system
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For broader context on aging biology and metabolic decline research, the NIH National Institute on Aging provides authoritative resources on the metabolic changes and epigenetic mechanisms that underlie age-associated obesity and sarcopenia

doi: 10.1152/ajpendo.00187.2006

Currently, this Inca jewel is one of the tourist centers of the country