Article in English: There are many variations on this diet, ranging from all-out fasting to just making sure your daily water is cold. One version, for example, suggests that you consume roughly two glasses of water before each meal while following a low-calorie diet. Researchers found that people who did this lost about 5 pounds more than those who skipped the water.  The water diet is best for a short amount of time. It is safest when combined with a normal diet, and can be dangerous when combined with fasting. The water diet may not be safe for everyone. When doing a water fast, you risk symptoms of low blood sugar like dizziness and fatigue, not to mention constipation, dehydration, and an intolerance of cold temperatures. If you know you struggle with low blood sugar, the water diet may not be for you. This diet tends to be a "yo-yo" diet, meaning that once you lose the weight, as soon as you go off of it, the weight comes back. When setting out to lose weight, you need to know where you are and where you want to be. Take the time to make some measurements (such as weighing yourself) and check standards for your body's healthy weight (such as BMI), and then set your goals from here.  Weigh yourself. Once you see your current weight, you'll be able to set accurate weight loss goals. Check your BMI (body mass index). BMI can tell you how healthy your weight to height ratio is. Someone who is 5’9” and weighs 150 pounds would do this math: [150 ÷ (65x65)] x 703 = 24.96. This BMI of 24.96 is in a normal weight range. You may check your BMI at home, but don’t start a new weight loss program without consulting your primary care physician. He or she will be able to more accurately evaluate your BMI and make fitness and diet recommendations. Tell your doctor about your water diet plan so he can suggest safe dietary recommendations. Everyone has different physical requirements, and seeing a doctor will prevent you from unnecessarily harming yourself.

Summary in Vietnamese:
Nghiên cứu chế độ ăn kiêng bằng nước. Đặt mục tiêu thực tế. Kiểm tra lại.