I need to reduce my weight atleast 12 kgs. My height is 5 feet and weight is 60 kg and I am 28 year old girl.

Weight loss. The healthiest way to loose weight is with attention to eating healthy (type and amount of food) and exercise. Shooting for 1-2lbs per week is a healthy way to go. Look for things that might be easy to change first (like eliminating high calorie beverages: soda, juice, gatorade, sweetened tea....) good job in your effort to be healthier!