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They are typically prescribed when oral supplements are ineffective or when rapid improvement of symptoms is required
doi:10.1016/s0083-6729(00)59012-8
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B12 injections are especially useful for people with a B12 deficiency, which tends to stem from difficulties absorbing the nutrient, not falling short nutritionally, says Foxx
The Symptoms of Vitamin B12 Deficiency B12 deficiency is known as The Great Masquerader. The Efficacy and Safety of Creatine for High Homocysteine Those on a healthy plant-based diet with elevated homocysteine levels despite taking sufficient vitamin B12 may want to consider taking a gram a day of contaminant-free creatine
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