If you are underweight (per the body mass index (BMI)) or simply looking to gain more weight, then the following high calorie meal plans can help you reach your goals. They are designed for anyone who is looking to gain weight in a healthy way. They can also be used by people who would like to build muscle. Here are some tips to Gain Weight in 7 days.Apps Contains:Eating to Gain WeightBuilding Muscle to Gain WeightGain Weight (For Women)Proper Diet For Weight GainTop 25 Foods to Gain Weight