They should only participate in a 500 calorie diet if they are under supervision of a medical professional. If their doctor says that this diet will work for them and is safe then it would be okay.
A 1000 calorie is a difficult thing to be completed and often exposes the person selecting the diet a limitation of food choices and nutrient selection. The biggest danger is damage to the metabolism of the person selecting the thousand calorie diet.
In any diet, about 45-65% of the diet should consist of carbohydrates. Based on a 1200 calorie diet, 540-780 calories should be from carbohydrates.
The key tenets of the Kaplan diet is that the calorie intake and the calorie consumed should be balanced. The idea of diet deficiency does not really work.
i think your food should be based on a 1800 calorie diet thats at least what i do
In terms of daily value 2000 calories is 100% of a 2000 calorie diet, and 80% of a 2500 calorie diet.
Fat foods
One major part of a low calorie diet is to drink plenty of water. You should read food labels and record the calories in a journal after you have predetermined your daily calorie intake.
Zero calorie foods are good for someone who is on a diet and are counting calories. It really depends on the diet you are on. While zero calorie foods might be low in calories some are high in carbs. If you are on a low carb diet, such as South Beach, this might effect your diet and do the opposite.
A person as young as you should consult a doctor before beginning any sort of diet for your health and safety.
you get more vitamins for your daily diet biased on a 2,000 calorie diet
If you are going for a 2,000 calorie diet, at least 25 grams. If you have a 2,500 calorie diet, at least 35 grams.
There is a website called caloriecountercharts.com where they have a calorie and fat gram chart for over one thousand different foods. This should help you with your diet.