vitamin b

hello guys I work out three times a week and my goal is to gain more muscle mass. I don't eat bad at all and I stay away from dairy products and gluten my main issue is my energy levels are not very good I'm looking at improving that by taking some vitamin B supplements I'm currently only using...

I can get two different types of Inj vit B cut the B complex doesn't contain Vit B12. These are my two choices: 1. VITAMIN B12 1000mcg. injection. or 2. B-100 COMPLEX vB1 100mg vB2 0.5mg vB6 1mg Nicotinamide 100mg What I would like to know if what would be the better choice for a boost in...