What vitamins (B6/B12) or multivitamin is good to take if I want strength and en!

What vitamins (B6/B12) or multivitamin is good to take if I want strength and energy?

I am always feeling week during the day and tired even if I get enough sleep at night.
So I am looking for something to to give me strength and energy cause I am doing weightlighting and just want to be strong and alert.

Today that doesn't really matter anymore.
Just don't take the cheapest vitamins and see that you get all of them, because each vitamin has its' purpose.

Vitamins do not make you strong.
Cutting back on coffeine (pop(soda), coffee) will make you weaker on a short outlook, but will improve you later.

Sitting around all day will weaken you or make you tired.

If you just need muscle strength, then it's protein.
ATP a sugar/ phosphat is the main energy source of ALL your cells. If you feel sore or week it will help, but wont do wonders.

Also fat will make you tired. Try a low fat/ high carbs, high protein diet.

Use supplementary stuff only if you really need to and visit some nutrition forums, they will help.

6-8 house a week will greatly improve everything.

I hope it is one of those things and i could help.