The Claim
In young men engaged in resistance training, muscle growth and strength adaptations resulting from a plant-based diet with soy protein supplementation are not inferior to those resulting from an omnivorous diet with whey protein supplementation.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Young men who follow a plant-based diet with soy protein supplements build muscle and gain strength at the same rate as those who eat meat and take whey protein supplements.
See the scientific wording
The muscle growth and strength adaptations observed in young men consuming a plant-based diet with soy protein supplementation are not inferior to those in omnivores consuming whey protein, suggesting that plant-based diets can be nutritionally adequate for resistance training outcomes when protein intake is optimized.
When a person consumes enough protein from soy or whey, the amino acids in the protein enter the muscles and turn on a molecular switch called mTORC1. This switch tells the muscle cells to build more contractile proteins, making the muscle fibers thicker over time. Resistance training adds mechanical stress that works with this switch to ensure the muscles grow larger and stronger.
What the research says
1 studyWhen young men ate a plant-based diet with enough soy protein or an omnivorous diet with whey protein — and both groups lifted weights the same way — they both gained the same amount of muscle and strength. So, plant protein works just as well as animal protein for building muscle if you eat enough of it.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.