Take a B12 supplement for targeted health needs, such as a known deficiency, a vegan/vegetarian diet, neuropathy or other nervous system issues, or the formation of red blood cells
Here are the best vitamin B12 injection sites for each method: Subcutaneous B12 injection sites Usually, the best places to give yourself a B12 shot subcutaneously are the abdomen, thigh, and upper arm, as you can see in this illustration: Although not shown above, the buttock is another good site for B12 shots
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Cyano B12 in particular should be avoided, especially in patients with pernicious anemia and/or with high homocysteine
Only it doesnt really does it