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You May Have a Vitamin B Allergy Vitamin B allergies are rare, but there are a few studies on the subject

Collettini A, Zoccali F, Barbato C, Minni A

Metabolic response Some individuals respond well to lower doses, while others may need adjustments for optimal results

In other cases, depending on temperature and vacuum pressure, the peptide may appear as crystals, small clumps, or thin films however, the actual peptide amount is always identical

Not diet-related If your vitamin B12 deficiency is not caused by a lack of vitamin B12 in your diet, you'll usually need to have an injection of hydroxocobalamin every 2 to 3 months for the rest of your life