can b12 injections cause headaches Shots at Home: How, Where & How Often to Inject Yourself Vitamin B12 Injection Side Effects

The question you might be asking is, why B12 specifically

this makes it easier.

B12 injection shots can usually be felt within 24 hours (and a change should show in blood tests after a month or two) A high dose of B12 oral supplementation takes the same time as an injection: roughly 24 hours to feel an improvement and then up to 2 months to show in blood markers

I am a 61 year old and b12 boosted my energy level and I lost weight as well I couldnt lose weight before but b12 helped boost my energy as well as lose weight and the great thing is that you dont have to take the injection or any other injections in your legs you can take them in the buttocks