American Health & Fitness Magazine American Health Vitamins, Nutrition, Products, Information and Supplements

Taking different Vitamins at once.?

I want to take 3 different Vitamins at once. I do not get a good diet so I need to get as much Vitamins as I need but I don't know if taking them at once is good. I have a bottle of Omega 3 Fish oil (1,000 mg),Vitamin D (400 I.U.),and a bottle of A thru Z Vitamins which has Vitamin A 3500 IU,Vitamin C 60 mg,Vitamin D 400 IU,Vitamin E 30 IU,Vitamin K 10 mcg,Thiamin (Vit. B1) 1.5 mg,Riboflavin (vit. B2) 1.7 mg,Niacin 20 mg,Folic Acid 400 mg,Vitamin B12 6 mcg. Is it ok to take these at once after a meal and is it ok to take 2 Vitamin Ds insted of one or will it cause some sort of poisoning?
I have no medical issues or have I ever had a disease.