Hi Thank you for asking HCM. I have gone through your query. Ayurwin nutrigain is a ayurvedic product which help in weight gain. They are assuring that this product is without side effects. But that is not actually correct. Any medication can cause side effects. It can be hypertension, metabolic syndrome and prone to diabetes on long term use. So it is better to have regular exercise and nutritious balanced diet for weight gain. You should also rule out malabsorption syndromes by doing stool routine test. Deworming should be done at least once in a year by drugs like albendazole. Hope this may help you. Let me know if you have any further queries. Thanks.