You can maintain it by 1. Eat small and frequent 4 -5 meals in a day, instead of 3 heavy meals. 2. Drink 3 -4 lts of water daily. 3. Include high-protein foods like milk and milk products, paneer, dals, soybeans, eggs, chicken/fish (if non-vegetarian). Reduce excess carbohydrate intake like rice, banana, chips, burgers, pizzas, etc 4. Minimize sugar intake in the form of sweets, cakes, pastries, chocolates, etc 5. Use less of oil to cook your food as well as stop eating fried stuff like puris, chips, samosas, etc. 6. Include 30 minutes brisk walks 5-6 times a week.