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Does Drinking Alcohol Affect Vitamin B12 Levels

The 500 Dalton rule favors GHK-Cu penetration (molecular weight roughly 340 Da), but the hydrophilic copper chelate reduces actual dermal delivery without a penetration-enhancing vehicle

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