giving self b12 injection How to self-inject intramuscular vitamin - Overview B12 Shots at Home: How,

Different forms require different handling

B12 injections might not be ideal if you: have had an allergic reaction to hydroxocobalamin or any other meds in the past have low levels of potassium have an irregular or rapid heartbeat Again, dont just start taking B12 if you dont know youre deficient

Jaka Vukojevi, Borna Vrdoljak, Dominik Malekinui, Marko Siroglavi, Marija Milavi, Kolenc, D., Alenka Boban Blagai, Lovorka Batelja, Domagoj Drmi, Sven Seiverth, & Predrag Sikiri

Treated animals show significant improvements in body composition without changes in food intake

Unsure if your side effects are normal

But attributing this fatigue to b12 deficiency requires evidence that deficiency has actually developed