Vitamin B12 can cause dermatitis, acne, and other skin-related conditions when taken in excess, according to a review in the American Journal of Clinical Dermatology
Subcutaneous B12 Injection Locations The 3 Most Common B12 Injection Sites The Lower Abdomen This is one of the most common subcutaneous vitamin B12 injection sites and is to be administered at or under the level of the belly button
Here are the realworld risk gaps: No standard dose or formulation Humans in papers got 20 mg IV in a pilot, but many online vendors sell subcutaneous vials without clear dosing guidance
It is not considered a vitamin because your body is unable to synthesize it
community and clinical sources describe dermatological monitoring for these changes, especially with long-term use Injection site darkening localized hyperpigmentation Mood changes irritability reported by some during loading Managing nausea: community sources commonly describe beginning at 100-250 mcg, injecting before bed on an empty stomach, using anti-nausea medication (ondansetron) when needed, and escalating the dose gradually