When it comes to absorption rate and how well our bodies use protein, whey protein totally outperforms pea protein overall. Here’s why: whey protein is water-soluble, so your body can absorb it directly without having to break it down first. Pea protein, on the other hand, is a plant-based protein that has some dietary fiber and phytic acid—those make its absorption rate a bit slower.
How Do Pea Protein and Whey Protein Stack Up in Absorption
The key measure for protein absorption is PDCAAS, which tops out at 1.0. The higher the score, the better your body soaks it up.
Whey protein: Its PDCAAS is around 1.0—meaning it’s a fully absorbable protein. Packed with amino acids that are super close to what our bodies need, it digests and absorbs really fast. Within 2 hours of eating it, your amino acid levels peak, which helps muscles grow and recover quickly.
Pea protein: Its PDCAAS falls between 0.6 and 0.8. Since it’s an incomplete protein, your body can’t absorb all of it, and it takes longer to do so too. But here’s the upside: it has no lactose, so it’s way better for people who are lactose intolerant.
Who’s Each Protein Good For?
Whey Protein Works Best For:
Fitness lovers looking to recover and build muscle, or boost their athletic stamina.
People who don’t have issues with lactose.
Non-vegetarians.
Anyone who wants a higher protein utilization rate.
Pea Protein Is Perfect For:
Vegetarians.
People who are lactose intolerant, or allergic to milk and lactose.
Folks who tend to get bloated from dairy products.
Those who care about cardiovascular health and overall wellness.
Tips for Using Them
If you’re a non-vegetarian into fitness and want to build muscle, whey protein is the way to go.
If you’re a vegetarian, lactose intolerant, or just someone after sustainable nutrition, pea protein is a better fit.
If you have multiple health goals, you can mix whey or pea protein with other nutritional supplements.
No matter which one you choose—whey or pea protein—you’ve got to pair it with a healthy, balanced diet to get the results you want.