One of the simplest ways to get lean fast is to cut carbohydrate intake in favour of high-protein. It is important to stick with whole foods and get the right ratio of protein, carbs and fat, as this will accelerate fat loss and preserve muscle mass, to optimising body composition.
Eating more protein and fat is also an efficient way to improve health and decrease risk factors for heart disease, cancer, and diabetes. However, there are many mistakes one can make on reduced carb diets that have profoundly negative effects including hindered fat loss, massive hormone imbalances and chronic inflammation.