The diet, supervised by a team of scientists and nutritionists, consists of a strict formula of carbohydrates, proteins and fats.
It's about controlling hormone levels in the body, particularly insulin and glucagons.
Those behind the diet say that when these are at the correct levels through the right intake of food, anti inflammatory chemicals are released to keep the body's weight in check.
They say the body then uses its stored fat for energy, thereby causing weight loss.
"Life is good now because food is medicine," said Manuel. "If you have the right food your body gets what it needs. If I can lose weight, anyone can."