Question: what are diets that work fast?
Answer: 5:2 diet. The 5:2 diet is based on a principle known as intermittent fasting (IF), where you eat normally for 5 days a week and fast on the other 2. ... 
Dukan diet. ... 
Paleo diet. ... 
New Atkins diet. ... 
Alkaline diet. ... 
South Beach Diet. ... 
Slimming World diet. ... 
SlimFast diet.