A new nutritional guide ranks protein sources by their calorie density, using official French data. The goal is to help people identify the leanest, most protein-dense options for optimizing their diet. The rankings cover animal, dairy, and plant-based foods, providing a clear hierarchy for informed choices.

For maximum protein with minimal calories, fromage blanc 0% leads the dairy category. In the plant-based realm, seitan is the standout, offering an exceptional 15.4g of protein per 100 kcal. This makes it a top choice for vegetarians and vegans focused on efficiency.

Lean animal proteins like dinde escalope grillée and cabillaud also rank highly, balancing protein content with low fat. The guide emphasizes that while some cheeses are protein-rich, their high calorie count makes them less efficient for pure protein intake compared to leaner options.