Unlock the Whey Secrets: The Top Protein Powders That Will Transform Your Gains in 2025—Insider Picks from a Certified Coach!
If you’re not a fan of coffee flavors, Gainful offers nine total flavors in individual-use packets, so you can pick and choose what you’re craving each day. Nastasi, who has tried many different Gainful Protein Powder flavors, says the Chocolate Peanut Butter, Caffe Mocha, and Sea Salt Caramel are his favorites.
What Is Whey Protein?
Whey protein is a concentrated protein source derived from cow’s milk, which contains two major proteins called casein and whey (4). Whey accounts for 20 percent of milk protein, and is considered a high-quality protein source. Cow’s milk protein is considered a complete protein because it contains all nine essential amino acids required by the body (5).
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