 they're having more trouble absorbing the B12, and B12 is critical. You think B12, think energy. If your energy is low and you're in your 50s or 60s, I mean, it may be a B12 issue. B12 helps the body to make red blood cells. We need that to carry oxygen to the tissues, so important for energy. B12 helps us to burn carbohydrates and turn them into energy.