Dried fish tops the list of whole foods, packing around 63 grams of protein per 100 grams. But if you expand the question beyond whole foods to include processed concentrates, whey protein isolate and soy protein isolate both reach 90% protein or higher by weight. The answer depends on whether you’re looking for something you’d eat off a plate or something manufactured in a lab.
The Highest-Protein Whole Foods
Among foods you can buy and eat without heavy processing, dried fish is the clear winner at 63 grams of protein per 100 grams. That’s roughly twice the protein density of chicken breast. The drying process removes most of the water, which concentrates everything, protein included, into a smaller, lighter package.
After dried fish, the rankings look like this for common whole foods per 100 grams:
- Chicken breast: 31 g
- Turkey breast: 30 g
- Tuna: 29 g
- Tilapia: 26 g
- Pollock: 24 g
- Shrimp: 23 g
- Halibut: 23 g
Biltong, a South African dried meat, hits about 57 grams of protein per 100 grams based on its nutritional profile (16 grams in a 28-gram serving). That puts it in the same territory as dried fish. Standard beef jerky lands in a similar range. Any time you remove water from meat or fish, you’re left with a protein-dense product.
Among dairy, Parmesan cheese is the standout at roughly 36 grams per 100 grams. Aging draws moisture out of the cheese over months, concentrating the protein. Most other hard cheeses fall in the 25 to 30 gram range.
Protein Powders and Isolates
If you’re counting processed products, protein isolates blow whole foods out of the water. Whey protein isolate contains at least 90% protein by dry weight, with most commercial products landing between 90 and 92 grams per 100 grams. Soy protein isolate matches that, also hitting a minimum of 90% protein on a dry basis. These are made by stripping away fats, carbohydrates, and water from their source ingredients until almost nothing but protein remains.
Vital wheat gluten, the base ingredient for seitan, is another concentrated plant protein. A single tablespoon contains about 7 grams of protein and only 1 gram of carbohydrate, which works out to roughly 75 grams of protein per 100 grams. That makes it the highest-protein plant-based ingredient you can buy in a grocery store without venturing into the supplement aisle.
Spirulina, Insects, and Alternative Sources
Dried spirulina contains 55 to 70% protein by weight, which means 100 grams could deliver up to 70 grams of protein. It also contains all essential amino acids. For a microalgae you can stir into a smoothie, that’s a remarkable concentration, higher than any fresh meat or fish.
Edible cricket powder typically ranges from 42 to 46% protein by dry weight, though the broader world of edible insects varies wildly. Depending on the species and how it’s raised, insect protein can range from 13% to over 77% of dry weight. Cricket powder sits comfortably in the middle and is the most commercially available form in Western markets.
Why Protein Quality Matters More Than Quantity
Raw protein grams don’t tell the full story. Your body can’t use all of the protein in every food equally well. The DIAAS (Digestible Indispensable Amino Acid Score) measures how completely your body absorbs and uses a protein source. A score above 100 is considered excellent.
Pork scores 117 on the DIAAS scale, making it one of the most bioavailable proteins measured. Soy scores 91, whey scores 85, and wheat drops to 48. That wheat number is worth noting if you’re relying on vital wheat gluten or seitan as a primary protein source. You’d need to pair it with other protein sources to compensate for its lower digestibility and missing amino acids.
Gelatin is another example of quantity not equaling quality. It’s almost entirely protein by weight, but it’s missing two amino acids (cystine and cysteine), which means it can’t serve as your sole protein source. It’s useful for joint health and cooking, but it’s nutritionally incomplete on its own.
Practical Takeaways for High-Protein Eating
If you want the most protein per bite from real food, dried fish, biltong, and jerky are your best options at 57 to 63 grams per 100 grams. If you’re open to supplements, whey and soy isolates push past 90 grams. For plant-based whole foods, vital wheat gluten and spirulina both exceed what you’d get from any fresh cut of meat.
The tradeoff with ultra-concentrated sources is that they often lack the full nutritional package of whole foods. A chicken breast gives you 31 grams of protein per 100 grams along with B vitamins, selenium, and phosphorus. A scoop of whey isolate gives you more protein per gram but not much else. For most people, mixing whole food protein sources with the occasional concentrated supplement covers both quantity and quality.