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Description
During the treatment, a small needle is injected into the muscles of the upper arm, thigh, or buttocks

J Toxicol Clin Toxicol

International Journal of Food Sciences and Nutrition, 62(5), 525532
Additionally, some medicines can increase the risk of deficiency
Vitamin B12 (hydroxocobalamin, cyanocobalamin): advise patients with known cobalt allergy to be vigilant for sensitivity reactions

They use injection doses for topical products
