bad reaction to b12 injection Shots at Home: How, Where & How Often Inject Yourself Common & Rare Side Effects

We will help you determine which frequency is best for your unique needs

Diarrhoea is an uncommon side effect of vitamin B12 supplementation, listed as a rare adverse reaction in UK product information for both oral and injectable preparations

On rare occasion, a patient may experience tiny bumps beneath the skin, a rash, headache, or itchy skin

However, some people may have difficulty absorbing B12 from their diet, particularly if they have gastrointestinal disorders or have had gastrointestinal surgery

PubMed Sikiric, P., Seiwerth, S., Rucman, R., Turkovic, B., Rokotov, D.S., Brcic, L., Sever, M., Klicek, R., Radic, B., Drmic, D., Ilic, S., & Kolenc, D