Hemp protein is a plant-based protein derived from the seeds of the Cannabis sativa plant. Its use to support the muscles body system is primarily justified by scientific evidence, though the strength of evidence is moderate. Hemp protein contains all nine essential amino acids, making it a complete protein source, which is important for muscle repair and growth. However, its amino acid profile is lower in lysine and leucine compared to animal-based proteins like whey, which may make it less optimal for maximizing muscle protein synthesis.

Several studies have demonstrated that plant-based proteins, including those from hemp, can support muscle maintenance and growth, especially when consumed in adequate amounts and as part of a balanced diet. A 2019 review in the journal Nutrients highlights that while plant proteins can support muscle health, they may need to be consumed in slightly higher amounts or combined with other protein sources to match the muscle-building potential of animal proteins. Hemp protein is also rich in fiber, healthy fats, and minerals, which may contribute additional health benefits.

While there is less direct research on hemp protein specifically compared to other plant proteins like soy or pea, its composition and digestibility suggest it can be effective for supporting muscles, especially in vegetarian or vegan diets. Thus, scientific evidence supports the use of hemp protein for muscle support, though it is not the most potent option available.