I read that alcohol depletes it...
Well I also read that putting a plug in a bath tub keeps the water from draining out.
Once you put the plug back the tub is not instantly filled. Take your time. Get a recommendation from a Dr.
Eat right, a multivitamin is more than enough if you are not poisoning your body. Or maybe a B vitamin. Don't over do it. It can't be fixed over night.