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Vitamin B12 is a key vitamin for mood, energy, nervous system function, and more

Age-related changes can affect your B12 levels Older adults can be susceptible to B12 deficiency because sometimes aging is concurrent with decreased absorption of the vitamin, Yourman says

These research substances are different ways to look at cellular metabolism, giving researchers ways to study weight management, muscle physiology and energy regulation

The problem is that translation from rodent models to human outcomes is notoriously unreliable, and we've been burned by promising animal data that didn't pan out in humans more times than anyone wants to count

If youre older than 75, youre at increased risk for low levels of vitamin B12