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Fatigue & Energy Enhancement: Quickly relieves chronic tiredness, boosts stamina, and fights mental fog
A deficiency in B12 can lead to a significant decrease in energy and exercise tolerance, along with fatigue
Beef kidney: 3 oz
Vitamin B12 has a very low risk of toxicity, so there's really no upper limit to how much you can take without harm
Vitamin B12, Fact Sheet for Health Professionals, National Institutes of Health, Office of Dietary Supplements Common questions about hydroxocobalamin, NHS (National Health Service), Hunt A, Harrington D, Robinson S
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