Hi.. Obesity can be due to a sedentary lifestyle, poor dietary habits while can also be due to hormonal imbalances.. If thyroid is not ruled out then proper dietary changes and exercise can help in reducing weight. -Start with daily brisk walk in the morning for about 45 minutes, you can start with thirty minutes and increase to 45.. -Join some cardio exercises like Aerobics, yoga etc.. -She can start taking warm water with honey and lemon in morning and warm water at night after meals.. -Take food in small portions and eat every after 2 to 3 hours.. -Do not eat late at night.. -She should also keep patience as it will not loose your weight in a month and can take about 4 to 5 months to see apparent difference.. - Add cinnamon in your vegetables and foods as it helps in improving metabolism.. -Cut down on carbohydrates and add more of fibers like salads and also proteins like pulses in diet.. -Eat green leafy vegetables, preferably cooked in very little oil.. If you want faster results then you need to consult a Physical trainer and go for weight training and muscle strengthening exercises along with above explained home remedies.. But if she has any medical conditions then first make a note to take assurance from her doctor.. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Honey Arora, Dentist