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There are some groups who may benefit from or need to supplement due to a B12 deficiency
Great for Gut Health Research : Nasal administration avoids first-pass metabolism
A 2009 rat study by Sever et al
The guiltiest heavy metal
Some uses are for increased energy, weight loss, stress relief, mental and emotional stability, and supplementation of diets deficient in B Vitamins, and treatment of vitamin B12 deficiencies
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