Simply thinking about macronutrient misses the bigger picture.
Proteins aren't created equal - they're our source of amino acids, nine of which are essential because our bodies can't produce them. Different protein sources have varying amino acid profiles. While quinoa and beef both provide protein, only beef is considered a "complete" protein with all essential amino acids in optimal ratios.
Fats aren't created equal either, the type of fat matters tremendously. Trans fats have been definitively linked to heart disease and inflammation, while monounsaturated fats like extra virgin olive oil are associated with increased longevity.
Carbs, guess what? Not all carbohydrates affect your body the same way. Simple sugars and refined starches can spike blood glucose levels, potentially leading to insulin resistance and type 2 diabetes over time. In contrast, resistant starches (found in foods like cooled potatoes and green bananas) act more like fiber, supporting gut health and providing steady energy.
You could be eating the exact same ratio of carbs:fats:proteins and have radically different health outcomes depending on what you are eating.
And this doesn't even address the vitamins and minerals essential for everything from bone health to immune function.
The key isn't just the macro numbers - it's the actual foods you're eating.
Not eating is calorie restriction