Q: how to lose 15 kgs in 30 days?

A: YOU CAN'T AND YOU SHOULDN'T!!! If you go on a crash diet you can certainly accomplish it by losing maybe 2-3 kg of fat, 4-5 kg of water, and 7-8 kg of muscle. After you do that you will look same or worse than before and you will regain whatever little fat you lost and MUCH MORE in very short order. Lose the mindset that you can quickly and easily slim down. It's not true no matter what all the commercials and ads are telling you. Eat healthy, exercise, weighttrain, and lose 2-3 kilos per month for true sustained fat loss. Do the right thing instead of looking for quick fixes which only backfire. Read this this article carefully and follow its directions. Good luck!