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Vitamin B12 injections are medically necessary when a patient has severe deficiency, neurological symptoms requiring rapid correction, or a condition that prevents adequate oral absorption
Vegetarians and vegans, for example, may be at a higher risk of deficiency since B12 is primarily found in animal products
For example, sugar alcohols like sorbitol or mannitol (used in some chewable or effervescent preparations) can have osmotic effects, drawing water into the intestinal lumen and potentially leading to loose stools in sensitive individuals
Bruising is rare and usually mild when it occurs
Energy The research is limited and far from a slam dunk but Cowling says higher doses of B 12 supplementation may increase energy, particularly if you have a deficiency or are at risk of a deficiency
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