The Claim
Increasing dietary protein intake from 15% to 30% of total energy reduces spontaneous daily energy intake by approximately 400 calories.
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.
When people increase the proportion of protein in their diet from 15% to 30% of total calories, they consume about 400 fewer calories per day without trying to restrict food intake.
See the scientific wording
Increasing dietary protein intake from 15% to 30% of total energy reduces spontaneous daily energy intake by approximately 400 calories.
When more protein is eaten, the gut releases hormones that tell the brain to stop eating, and the food takes longer to chew, which also tells the brain to feel full sooner. This causes people to eat fewer calories without trying.
What the research says
1 studyStudy: Short-term effects of high-protein, lower-carbohydrate ultra-processed foods on human energy balance
When people ate more protein in their ultra-processed meals, they naturally ate about 200 fewer calories a day without trying—this supports the idea that more protein helps people eat less, even if the number isn’t exactly 400.
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.