Protein Beyond Eggs: Why Diversify?
Americans are increasingly focused on protein, with the latest federal dietary guidelines recommending 1.2 to 1.6 grams per kilogram of body weight. While a large egg provides about 6 grams of high-quality complete protein, according to registered dietitian Lauren Manaker, rising costs, allergies, or cholesterol concerns may lead some to seek alternatives. Nutrition experts emphasize that diversifying protein sources ensures a broader range of nutrients.
Seafood Powerhouses: Tuna and Salmon
Canned tuna leads the list with 20–22 grams of protein per 3-ounce serving—roughly the size of a deck of cards. Morgan Walker, a registered dietitian nutritionist, notes that tuna is a complete protein rich in omega-3s, supporting cardiovascular health. However, due to mercury content, the FDA and EPA recommend limiting intake to six ounces per week. Salmon offers 20 grams per serving, plus omega-3s for heart and brain health and vitamin D for muscle repair, with lower mercury risk.
Plant-Based Champions: Tofu, Lentils, and Edamame
Firm tofu provides 20 grams of protein per cup. Manaker highlights its isoflavones, which may benefit bone health and heart health. Lentils deliver 18 grams per cooked cup, along with fiber, iron, and folate. Manaker notes that lentils help regulate blood sugar and lower cholesterol. Edamame offers 17–18 grams per cup, with fiber and magnesium supporting fullness and blood sugar control, according to Walker.
Dairy and Alternatives: Greek Yogurt, Cottage Cheese, and Milk
Greek yogurt contains 10–17 grams of protein per single-serving container, plus calcium and probiotics for gut and bone health. Jacqueline Vernarelli, a nutritional epidemiologist, notes its protein content is double to triple that of an egg. Cottage cheese provides 12–14 grams per half-cup, rich in casein protein for sustained muscle repair. Dairy milk offers 8 grams per 8-ounce glass, with calcium, vitamin D, and potassium; ultrafiltered milk has about 13 grams. Manaker adds that milk is linked to reduced risk of obesity and cardiovascular disease.
Other Notable Sources: Shrimp, Quinoa, and Pumpkin Seeds
Shrimp packs 18–20 grams of protein per 3-ounce serving, along with selenium and vitamin B12 for thyroid and metabolic health. Quinoa, a complete plant protein, provides 8 grams per cup and is gluten-free. Pumpkin seeds offer 7–9 grams per ounce, with magnesium, zinc, and iron for immune function and satiety.
