Months lack energy, strength. feel weak after doing things. lack appetite. lot test done. everything ok. would a b12 shot help? or any meds

B12 if deficient: If not deficient in b12, shot won't help. Blood test could confirm if exclude.

How's Your Sleep?: Are you getting a good 7 to 8 hours of sleep a night? Poor sleep can be a big factor in your energy. Do you feel depressed? See your doctor for a proper evaluation to make sure something is not going on before you start taking over the counter remedies. If you need b12, your doctor can prescribe it. Fell better.