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Compounded methylcobalamin may also help in improving concentration, maintaining fertility, anti-aging, boosting energy levels, converting fat to energy and mood elevation

Journal of Applied Physiology , 110 (3), 774780

The effect of whey protein supplementation after eccentric resistance exercise on glutathione peroxidase and lactate dehydrogenase in non-trained young men Larsson S.C., et al

Homocysteine levels can also help assess vitamin B12 status in people with adequate folate and B6 status

On the antioxidant side, Vitamin C and glutathione have a "recycling" relationship

Animal studies suggest it may accelerate repair of muscle, tendon, and ligament injuries while reducing inflammation and soreness, allowing faster return to training