Formula slimming foods are nutritionally fortified calorie restricted products designed to help dieters achieve an energy restricted diet without sacrificing nutritional requirements. This is important as it has been shown that meeting nutritional requirements from consuming 'normal' foods alone can be difficult once calorie intake falls below 1200 kcal per day.

There are many slimming products on the market, but formula slimming foods are the only commercial slimming foods that have been extensively studied and shown in clinical trials to be effective in both weight loss and weight maintenance.

Formula slimming foods are well regulated and are convenient and easy to use. Many slimmers find them an effective and useful way to lose weight.