The Claim
A sustained moderate caloric deficit reduces metabolic rate, lowers leptin concentration, increases concentrations of hunger hormones, and decreases non-exercise activity thermogenesis.
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 a person consistently eats fewer calories than needed, their metabolic rate decreases, leptin levels drop, hunger hormones rise, and spontaneous physical movement declines.
See the scientific wording
A sustained moderate caloric deficit reduces metabolic rate, lowers leptin, increases hunger hormones, and decreases non-exercise activity thermogenesis.
When the body gets less food over time, it senses the energy shortage and responds by slowing down metabolism, reducing the hormone that signals fullness, increasing the hormone that triggers hunger, and making a person move less without realizing it. This happens because the brain detects low fat stores and activates survival pathways that conserve energy and drive food-seeking behavior.
What the research says
2 studiesWhen people eat fewer calories, they usually feel hungrier and their hunger hormones go up — this study found that exact thing happening. Adding exercise helped reduce that hunger a bit, but the diet-only group still got hungrier, just like the claim says.
When people eat much less for a while, their bodies slow down their metabolism, make them feel hungrier by changing hormones, and make them move around less without trying — even if they don’t feel hungrier on purpose. This study saw all those changes happen.
Related videos
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.