• Developed by Dr. Michael Mosley
• The diet claims to potentially cut the risk type two diabetes, heart disease, and cancer
• There are two stages to this diet. Stage 1 requires the person to undergo a very low-calorie diet (VLCD) of 800 calories per day. Stage 2 then involves the progression of the daily 800 calories from 7 days a week to only twice a week, and the remaining 5 days they will be on the Mediterranean diet.

There are two stages to this diet regimen:

• Stage 1 - targets the metabolically active abdominal fat. It aims to normalize the liver and pancreas fat and help promoted regular insulin response and blood glucose management.
• Stage 2 - is gradual weight loss that includes intermittent fasting and a change to the Mediterrenean diet.

To those who would want to adopt this diet, they should be aware that this is profoundly affect their bodies and side effects such as headaches, tiredness, and constipation may occur. It is also recommended that they take vitamin and mineral supplements.

The Fast 800 is a diet that is mainly recommended to those who have an obesity-related complication that would benefit from rapid weight loss. This type of regimen should be followed under the supervision of a healthcare expert.

It is NOT recommended for those who are: under the age of 18, the elderly, those who have pre-existing medical conditions and are undergoing medication, those who have an eating disorder, and to anyone participating in endurance exercises.