Protein concentrate is the least processed common form of protein powder. It goes through filtration to remove water and some non-protein components, but retains more of the original fat, lactose (in dairy proteins), and other naturally occurring compounds. The result is a powder that is typically 70 to 80% protein by weight — still a solid protein source, just not as concentrated as isolate.
Why It Matters
Concentrate's main advantages are price and taste. Because it requires less processing than isolate, it's usually 20 to 40% cheaper per serving. The retained fat also tends to give it a creamier, richer flavor and texture that many people prefer. Nutritionally, concentrate retains more of the naturally occurring immunoglobulins and growth factors found in whey — whether these have meaningful health benefits at supplement doses is debated, but they're not harmful. The tradeoff is fewer grams of protein per calorie and a higher likelihood of digestive issues for people sensitive to lactose or fat.
What to Look For
If you tolerate dairy well and want to keep costs down, concentrate is a perfectly reasonable choice. Check the protein percentage: divide protein grams by serving size grams. Anything between 0.70 and 0.80 is standard for concentrate. Below 0.70, you're getting a lot of filler. Be aware that some brands blend concentrate with isolate and market it as "protein blend" — this isn't necessarily bad, but it means the protein percentage and digestibility will fall somewhere between the two. If you're price-sensitive but lactose-intolerant, plant-based concentrates (pea, rice) avoid the lactose issue entirely.
For GLP-1 Medication Users
Concentrate can be a cost-effective option, but GLP-1 users should be aware that the higher fat and lactose content may be harder to tolerate. If you're experiencing nausea or digestive sensitivity from your medication, concentrate's extra fat and lactose can make things worse. Many GLP-1 users start with isolate for tolerance and switch to concentrate later if their stomach settles down.
Related Terms
Isolate
A protein powder processed to contain 90% or more protein by weight, with most fat, lactose, and carbohydrates removed. The purest common form of protein powder.
Whey
A dairy-based protein derived from cheese production. Fast-absorbing, high in leucine, and rated 1.0 on the PDCAAS scale — widely considered the gold standard for muscle preservation.
Serving Size
The recommended amount of protein powder per use, usually one scoop. Serving sizes vary widely between brands — always check grams of protein per serving, not just scoops.
Hydrolysate
Protein that has been pre-digested by breaking it into smaller peptides. Absorbs faster than isolate or concentrate and is the gentlest option for sensitive stomachs.