No need, 1.66 meters tall, between 45 kg and 55 kg, standard! Also, don't easily believe what is said to lose weight. Thin people are naturally thin, and fat people will naturally get fat. People's fatness is not determined by whether they lose weight or not, but by a cell that burns calories in your body. People with more cells are not easy to gain weight, and fewer people are willing to gain weight, even if you eat less. Besides, I'm telling you, more exercise will increase this cell.