The '40:40:20' diet is renowned for being used by many of the most successful bodybuilders in history and helped popularised by Arnold Schwarzenegger. It is a macronutrient (macro) split/macro tracking diet with its total daily calorie content composing of 40% carbohydrate, 40% protein and 20% fat. The 40-40-20 meal plan is a nutrition-based approach to eating. It emphasizes a specific macro-nutrient ratio - 40% carbs, 40% protein, and 20% fat - tailored to individuals' goals and needs. Carbs offer long-lasting energy and should be the bulk of daily intake. The 40 40 20 Diet is a popular eating plan that focuses on balancing macronutrients to optimize weight loss and overall health. This diet emphasizes consuming 40% of calories from carbohydrates, 40% from protein, and 20% from healthy fats. 0Vg4jx.