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vitamin b12 injections side effects acne induced acneiform eruption: Heliyon Did Vitamin B12 Give Me
Description
If you have never been tested and you have symptoms, the first step is a blood test, not a syringe

Itching or rash

Discuss the specific dose with your doctor

But before we jump to determine which is better between oral vitamin b12 pills and intramuscular vitamin b12 injections, lets first explore what exactly vitamin B12 is
