While most veggies average between one to five grams of protein per serving, a cup of peas can contain up to 10 grams, making it one of the most important plant-based protein sources out there, says Mary Dan Eades, M.D., author of Protein Power. But that's not all: Unlike other plant sources, peas also contain high levels of glutamine, an amino acid compound that helps repair your muscles after workouts, improve digestive health, and they've even been shown to reduce sugar and alcohol cravings. In other words, start defrosting that bag in the freezer, like, right now.

"Out of all the protein sources, I would put organic wild fish as the best protein choice out there," says Perlmutter. Considering a five-ounce portion packs a hefty 39 grams of protein in it, we totally get why. Not to mention it's full of omega-3 fatty acids, which help lower the risk of coronary heart disease, keep your LDL cholesterol levels in check (that's the bad kind), and reduce inflammation. While farmed salmon has a decent amount of nutrients in it, Perlmutter says it's worth getting the wild variety, which the USDA says has around 130 fewer calories per serving.

3) Cottage cheese

Cheese fans, rejoice: You don't need to make a huge sacrifice when you're trying to lose weight. With a whopping 25 grams of protein and only 200 calories in a cup, a scoop of cottage cheese makes for a perfect afternoon snack. Plus it's chock-full of casein, a dairy protein that ultimately keeps you full longer, so you won't be so tempted by that damn vending machine come 3:00 PM.

4) Eggs

But we're not just talking egg whites, people. Even though some claim there's too much cholesterol and saturated fat in the yolk, Eades points out that the yolk is exactly where you'll find tons of vitamins A, D, and E-stuff you're not going to get in the whites alone. And you can't argue with the heart healthy omega-3s, which research has shown reduces the risk of heart disease and weight problems.