Zinc is good for healing (and also for sexual dysfunction, as in preventing it). A general supplement is OK but don't overdose on mega-levels. Excess vitamin E can have an oxidising effect (aging, too many free radicals), as can other anti-oxidants. A sensible vitamin-mineral supplement will only help if you're deficient, a well balanced diet (yeah, like we all have that) is enough to give you what you need. Smoking, doing drugs, staying out of the sun too long can all lead to a deficiency, especially Vit D. You might also want to consider a supplement with time release pro-biotic components. These will help with digestion and nasties like depression and thrush.
Constant tiredness can mean you're partying too much, not getting enough of the right foods or have an under-active thyroid. Best get a checkup if it is a long-term condition.
Oh, and the bit no one likes to hear, exercise is dead good, the more you exercise the more energy you will have.
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