Do vitamins help?

I tried them for a while, but after I ran out haven't bought any more.

I heard vitamin B is the best, but I still have a few supplements- no idea if they help at all:

Fish oil capsules for Omega 3s
Optimal Whey (protein) shake

and Dr. Shallenberger's Super Immune Quick Start, which has-

•30,000 IU beta Carotene
•10,000 IU Vit A
•2,000 mg Vit C
•400 IU Vit E (d-alpha)
•1000 mg Hesperidin Bioflav Complex
•120 mg Ginkgo Biloba Extract
•600 mg Magnesium (citrate)
•10 mg Manganese (amino acid chelate)
•300 mg Potassium (citrate)
•200 mcgm Selenium (selenate)
•1200 mcgm Chromium (picolinate)
•16 mg Zinc (picolinate)
•2 mg Copper (amino acid chelate)
•100 mg B1
•50 mg B2
•100 mg Niacin
•300 mg Pantothenic Acid
•100 mg B6
•1000 mcgm B12
•1000 mcgm Folic Acid
•500 mcgm Biotin
•300 mg Astragalus Extract
•6 grams Spirulina Pacifica
•750 mg L-Glutamine
•100 mg n-Acetyl Cysteine
•320 mg Saw Palmetto
•5 grams psyllium husks
•5 grams stabilized rice bran
•5 grams soy protein isolate*
•5 grams whey protein (undenatured)*

Looking at that list, I guess I don't need the vitamins. If this stuff doesn't help, I'm not sure what will.