PBfit is not a complete protein. It contains all nine essential amino acids, but three of them, lysine, threonine, and methionine, are present in amounts too low to meet the threshold for “complete.” With a protein quality score of 0.52 out of 1.0, peanut protein delivers roughly half the amino acid quality of eggs, dairy, or soy.
That said, PBfit packs 8 grams of protein into a small serving, and pairing it with the right foods closes the gap easily. Here’s what you need to know.
What “Complete Protein” Actually Means
A complete protein contains all nine essential amino acids in adequate amounts. Your body can’t make these on its own, so they have to come from food. The FDA lists dairy, eggs, meat, poultry, seafood, and soy as complete protein sources. Peanuts don’t make that list.
The standard measure of protein quality is the PDCAAS, a score from 0 to 1.0 that accounts for both amino acid content and how well your body digests the protein. Eggs and whey score a perfect 1.0. Peanuts score 0.52, meaning about half the protein you eat from peanuts is usable for building and repairing tissue compared to a top-tier source.
What’s in PBfit
PBfit is made from just three ingredients: roasted peanuts, coconut sugar, and salt. The peanuts are pressed to remove most of the fat, which concentrates the protein. Each 16-gram serving (about two tablespoons of powder) delivers 8 grams of protein, a solid amount for something you can stir into a smoothie or mix with water.
Because the only protein source is peanuts, PBfit’s amino acid profile mirrors that of defatted peanut flour. It has generous amounts of leucine, phenylalanine, and valine. Where it falls short is in three specific amino acids.
Where Peanut Protein Falls Short
Research on roasted peanut protein identifies the same three limiting amino acids, in order of severity: lysine, threonine, and methionine. “Limiting” means these are the ones that run out first when your body tries to use the protein. Think of it like a factory that has plenty of some parts but keeps running short on three others. Production stalls at the weakest link.
To put some numbers on it: a 60-gram portion of defatted peanut flour contains 1,124 mg of lysine, 1,073 mg of threonine, and 385 mg of methionine. Those amounts aren’t zero, but they’re below what your body needs relative to the total protein consumed. Methionine is especially low. By comparison, leucine clocks in at 2,030 mg in that same portion, more than five times the methionine content.
How to Make PBfit Work as a Protein Source
You don’t need every food to be a complete protein on its own. Your body pools amino acids from everything you eat over the course of a day, so pairing PBfit with foods that are strong where peanuts are weak gives you the full set.
The classic pairing is legumes with grains. Peanuts are botanically legumes, and grains happen to be rich in methionine while legumes supply lysine. Combining the two covers both gaps. Practical options include:
- Oatmeal with PBfit mixed in. Oats are a good source of methionine and threonine, the two amino acids peanuts lack most.
- PBfit smoothie with milk or soy milk. Dairy and soy are both complete proteins on their own, so blending them with PBfit gives you full amino acid coverage plus extra protein.
- PBfit spread on whole wheat toast. The wheat provides methionine and balances the peanut protein nicely. This is the same principle behind the classic peanut butter sandwich.
- PBfit stirred into yogurt or cottage cheese. Another route where the dairy does the heavy lifting on amino acid completeness.
You don’t even need to eat these foods at the same meal. As long as your overall diet includes grains, dairy, or other protein sources throughout the day, the amino acids from PBfit will be used efficiently.
PBfit vs. Other Protein Powders
If you’re choosing PBfit specifically as a protein supplement, it’s worth knowing how it compares. Whey and casein protein powders score a perfect 1.0 on the PDCAAS scale, meaning every gram of protein listed on the label is fully usable. Soy protein isolate also scores 1.0. PBfit, at 0.52, delivers roughly half the usable protein gram-for-gram.
That doesn’t make PBfit a bad choice. Eight grams of protein per serving with minimal fat and a short ingredient list is appealing, especially if you’re adding it to foods that already contain complementary amino acids. But if you’re relying on a single powder to hit your protein goals after a workout, whey or soy will get you there more efficiently.
For people who avoid dairy and soy, blending PBfit with a rice protein powder is another option. Rice protein is high in methionine but low in lysine, making it almost a mirror image of peanut protein. Together, they form a complete amino acid profile.