There are vitamins to take for diet:

This Vitamin helps our body in more ways than one, from keeping our system strong to conversion of glucose from food into energy, it does it all.
Consumption of bell peppers, oranges, grape fruit and lemons are all good sources of this vitamin.
This vitamin helps control by burning the sugar and other food items into calories and energy.

Part of the Vitamin B family, it is required for body to burn fat metabolism and avoid accumulation of fat in our liver.
Egg yolks, cucumber, wheat germ are good sources of this.

Said to be very effective in weight loss, calcium helps keep our bones strong and in fighting reducing risk of gaining weight.
Milk, cheese, yogurt are good sources of Calcium.