** Thanks for contacting HCM with your health concern and if gastric problem is an issue thus consult with a Gastroneterologist to exclude the same, till then: . Good food rich in proteins . Regular gradually increased exercise. . Light exercise, such as a 20-minute walk, about an hour before meals to stimulate appetite. [also maintain muscle mass] . Consult a registered dietitian for additional advice on meal planning. PS. Tonics & Injections alone are not going to help gain weight, good food & exercise must accompany the medicines for a substantial gain in weight (if investigation comes normal) i. encourage outdoor games and exercises like running, swimming, Yogasanas, Surya-namaskar. ii. Take protein rich diet (legumes sprouted pulses/cereals, milk with protein powder (which are required for manufacturing of antibodies) iii. Take vitamin A,B,C,E in diet which helps in strengthening the immune system. 1. first deworming is essential: make powder of raw mango seed and give 250mg with yogurt or water empty stomach in morning for three days(AVOID: cucumber, long cucumber, raw fruits, potato, meat, sugar, sour foods, milk, jaggery, clarified butter for 15 days) and give walnut, PINEAPPLE, peach 2.there after improve digestion : avoid: heavy,slimy food (initially)along with fetid odor and unpleasant sight and give old rice (1 year old but not diseased), green gram,fresh green vegetables, banana, pomegranate, garlic,ginger,raisins,black pepper,clarified butter,butter milk, regular brushing of teeth and tongue cleaning, bathing, lemon,salt,mint,morning walk i. Syrup Liv.52 or Syrup Livomyn 2tsf thrice a day,(1/2 hour after meals) ii. Hingvashtak churna 1 tsf dissolved in 1 glass of lukewarm water and half lemon squeezed and give him to drink spoon by spoon every 5 minutes (1/2 hour before meals) . Kumar kalyan was half tablet with honey and thereafter take 10ml of Kaumaryasav with an equal amount of water (after meals) twice a day.