When it comes to getting enough protein in your diet, both plant and animal sources can play important roles in supporting your health, but understanding the differences helps you make smarter choices.
According to nutrition experts at Levels, a metabolic health company, what they call the “protein package” – everything that comes alongside the protein itself – makes a significant difference in long-term health outcomes.
Animal proteins like chicken, fish, eggs, and dairy are considered “complete proteins” because they contain all nine essential amino acids your body cannot produce on its own, making them highly efficient for muscle building and repair. However, these sources often come bundled with saturated fats and cholesterol.
Plant-based proteins from beans, lentils, chickpeas, nuts, seeds, and whole grains are typically “incomplete proteins,” meaning they may be low in one or more essential amino acids – but combining different plant sources throughout the day (like beans with rice, or hummus with whole grain pita) ensures you get all the amino acids you need.
The advantage of plant proteins is their nutritional package: they deliver valuable fiber for digestive health, antioxidants that fight inflammation, and essential vitamins and minerals, all while being naturally lower in saturated fats. Recent research shows that people who get a higher ratio of their protein from plant sources have significantly lower risks of heart disease, type 2 diabetes, and certain cancers.
The key takeaway isn’t to eliminate animal proteins entirely, but rather to emphasize variety – including diverse, whole, minimally processed proteins from different food groups helps you maximize nutrition while supporting overall wellness and meeting the general guideline of 1.2 to 2.0 grams of protein per kilogram of body weight daily.