Well, I do understand your concern for your sister. First you need to check on few parameters and pin point the reason of her not eating anything properly. One is, she might be having digestive issues, worm issues, or sometimes hormonal imbalance. So, visit a physician to detect her problem first. If all are OK, then she needs to take high calorie yet nutritious foods, milk n it's products are good. Nuts and fruits. Lots of fluid intake throughout the day. You can consult a dietician for specific modifications to be made in her eating habits.

Hello! She is suffering from anorexia. Either she is having disturbed metabolism/ hormonal imbalance - thyroid dysfunction/ Liver issues / psychological disturbance To resolve this, just follow some simple things Take ginger juice + organic honey daily 1 spoon twice a day 15 mins before meals Give homemade jal jeera daily especially with green chutney Give Alfalfa Q - homoeopathic mother tincture- 10 drops twice a day 10 mins before meals for a month Perform 'prithvi' mudra for 20 mins in morning & evening P.S. that optimum exercise helps to boost metabolism. Regular deworming helps to enhance absorption of nutrients. She is not having constipation. If it's 'Anorexia Nervosa'please take care that her emotional needs are taken care of as well as she is convinced to have balanced diet.

Hello.... Any person loves to have tasty food.. She is different .. She has to take nutritious foods.. Explain her problem which she faces with lean body.. Encourage her to take fruits and vegetables.. Avoid unhealthy, spicy foods. Only give her nutritious foods. Dry fruits can also be given. Keep all nutritious foods and tell her to eat frequently in small quantity.