The best way to lose weight as a woman is going to a good nutricionist by all means, and also doing exercise regularly and drinking at least 2 lt of water per day. But if you need to lose it fast and you don't mind being a bit hungry, you could try the cabbage soup diet. Basically you have to eat this low fat soup for seven days three times a day, you can also eat boiled vegetables, meat and rice, all of this without any fat or oil added. If you want to know the exact recipe and how to do it correctly you can find it easily on Google.