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Best Time of Day For most men, testosterone levels peak early in the morning, between 7:00 AM and 10:00 AM

The solution might be to change the medication or add B12 supplements

Vitamin B12 is primarily found in animal-based foods, including beef, salmon, yogurt, and milk, though some plant-based foods, like nutritional yeast, are fortified with it

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