When someone reaches for a vegan protein for the first time, they almost always hear the same question: "Yeah, but does it actually work?"
For years, the fitness industry has held onto a stubborn belief that plant-based protein and muscle building don't really belong in the same conversation.
If you want to build muscle, you need whey. If you choose a vegan protein, you're probably making some kind of compromise. But is that actually what the science says? The answer is more surprising than you might think.
The Problem Isn't the Protein
When we talk about protein, we're not really talking about protein. We're talking about amino acids. Your body doesn't particularly care whether protein comes from milk, beef, peas, or rice. What matters is whether it receives the essential amino acids required to support muscle protein synthesis. Most of the skepticism surrounding vegan protein comes from an earlier era of sports nutrition, when manufacturers tried to build complete protein products from a single plant source. The challenge is that many plant proteins don't naturally contain optimal amounts of every essential amino acid—particularly leucine, one of the key amino acids involved in muscle protein synthesis.
But modern formulations are built differently.
Today's best plant-based proteins combine multiple protein sources to create a more complete amino acid profile. That's why a well-formulated vegan protein is fundamentally different from the products that originally shaped many of the stereotypes surrounding plant-based protein.
Why WILL's Vegan Protein Is Built Around a Protein Matrix
The philosophy behind WILL's Vegan Protein was never to simply replace whey with a plant-based alternative. The goal was to create a protein matrix that combines multiple plant protein sources to provide a more complete amino acid profile. Because the real strength of modern plant proteins isn't found in a single ingredient.It's found in how those ingredients work together.
But What Does the Science Say?
A 2021 systematic review and meta-analysis examined 18 randomized controlled trials comparing plant and animal proteins. The researchers found that protein source alone did not significantly influence improvements in muscle strength. The differences were far smaller than what fitness culture often suggests. Even more interestingly, a newer meta-analysis published in 2025 found no significant differences between plant and animal proteins when it came to muscle strength or physical performance. While researchers did observe small advantages for certain animal proteins in muscle mass outcomes, the differences were nowhere near as dramatic as social media discussions often imply. Put simply: For most people, the limiting factor in their progress is not whether their protein comes from plants or animals. It's whether they're consuming enough high-quality protein consistently in the first place.
The Bottom Line.
Perhaps the most interesting question is no longer whether vegan protein works. Science is increasingly suggesting that it does. The real question is whether we're still making decisions based on outdated myths or based on what modern formulations are actually capable of delivering. Because when it comes to protein, the conversation has evolved. Maybe it's time our assumptions did too.
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