I changed my vitamins - help/

I've been taking Centrum for ever because that's just what my mum had, but I was reading here about the importance of vitamins, so I got "GNC Ultra Mega Gold" or something. these are the stats:
As a dietary supplement, take two caplets daily.





Serving Size 2 Caplet(s)
Servings Per Container 45



Amount Per Serving % DV




Vitamin A (50% as beta-Carotene 50% as Acetate) 5000.00 IU 100%

Vitamin C (as Ascorbic Acid) 500.00 mg 833%

Vitamin D (as Cholecalciferol) 400.00 IU 100%

Vitamin E (as natural d-alpha Tocopheryl Succinate & dl-alpha Tocopheryl Acetate) 300.00 IU 1000%

Thiamin (as Thiamin Mononitrate) 100.00 mg 6667%

Riboflavin (Vitamin B-2) 100.00 mg 5882%

Niacin (as Niacinamide) 100.00 mg 500%

Vitamin B-6 (as Pyridoxine Hydrochloride) 100.00 mg 5000%

Folic Acid 400.00 mcg 100%

Vitamin B12 (as Cyanocobalamin) 150.00 mcg 2500%

Biotin 100.00 mcg 33%

Pantothenic Acid (as Calcium d-Pantothenate) 100.00 mg 1000%

Calcium (as Calcium Carbonate) 100.00 mg 10%

Iodine (as Kelp) 150.00 mcg 100%

Magnesium (as Magnesium Oxide) 50.00 mg 13%

Zinc (as Zinc Oxide) 15.00 mg 100%

Selenium (as Selenium Yeast) 200.00 mcg 286%

Copper (as Cupric Oxide) 2.00 mg 100%

Manganese (as Manganese Gluconate) 2.00 mg 100%

Chromium (as GTF Chromium Yeast) 120.00 mcg 100%




Molybdenum (as Molybdenum Yeast) 75.00 mcg **

Boron (as Boron Gluconate) 1.00 mg **

Choline Bitartrate 55.00 mg **

Inositol 25.00 mg **

Citrus Bioflavonoids Complex 12.50 mg **

Rutin Powder 12.50 mg **

Hesperidin Complex 12.50 mg **

Quercetin Dihydrate 12.50 mg **

N-acetyl-L-cysteine (NAC) 10.50 mg **

Amylase (U.S.P. Units) 20.00 mg **

lipase 12.00 mg **

Protease 6.00 mg **

cellulase 12.00 mg **

Lycopene 950.00 mcg **

alpha-Lipoic Acid 30.00 mg **

Green Tea Leaves Extract (Camellia sinensis) 15.00 mg **




** Daily Value (DV) not established




The quantities are much more than centrum from what I can see - are these any good? I know there is probably better but GNc is the only brand in Singapore available for this kind of stuff.

Also, could someone explain why vitamins are so important for my goal (weight gain!)

Many many thanks

Julian

yeah the GNC multi will do the job, so glad you got away from centrum! Vitamins are very important because they provide your body with the nutrients it needs for overall health, and what vitamins and minerals your diet might not provide or provide enough of.

Current Stack:
FOOD!
Alive whole food multi
Whey
Creatine
Flax Oil
Vitamin C