Hello I have gone through your question and understand your concern. Lemon and warm water is safe to drink as it is natural and does not contain any harmful chemicals or additives. Weight management is a multi-factorial task, it requires diet management along with physical activity, good rest and proper sleep. Avoid junk food, carbonated drinks, canned food, sugar loaded desserts and fruit juices and white rice. Consult a nutrition expert for a better diet plan that is well suited to your need. physical activity of 45 minutes at least 5 days a week will help you burn fat and improve your overall health and fitness. Hope your concern is answered. Thank you.