It depends entirely on the person. Each person's caloric needs may be different. Current height, weight, and activity level all play into the equation. Ideally, each person will have a specific number of servings from each major food group while staying within their calorie requirements for the day.
The best way to lose weight is to get nutritional counseling from a physician. A physician who has training in nutrition management can help the patient form realistic goals. They will also be able to customize an eating plan that is based on science. When the eating plan is followed properly, the weight will come off. Most diet plans fail because they simply aren't sustainable ways of eating for the long term. A healthy eating plan that is created by a physician will include low amounts of the unhealthy foods like saturated fats. It will contain high levels of the healthy foods like fresh fruits and vegetables. Healthy eating plans also keep sodium levels low and avoid processed food whenever possible. This is a type of eating plan that a person can follow for an entire lifetime, while most fad diets leave people feeling miserable and exhausted after only a matter of days.
Diet impacts health in many ways. People who have poor eating habits are more likely to become overweight or obese. Excess weight is one of the leading contributors to health problems like heart disease. People who are overweight are also more likely to develop type 2 diabetes. The medical problems that can result from diet are completely avoidable, however. Taking advantage of nutritional counseling help from an experienced primary care doctor can literally make the difference between good health and poor health today!
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