The Claim
In women with obesity, two weeks of calorie restriction alone or combined with interval exercise increases post-meal peptide tyrosine-tyrosine (PYY) levels, but neither intervention alters fasting PYY or des-acyl ghrelin levels.
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.
In women with obesity, two weeks of eating fewer calories or combining that with interval exercise raises levels of the hormone PYY after meals, but does not change PYY or des-acyl ghrelin levels when fasting.
See the scientific wording
In women with obesity, two weeks of calorie restriction alone or combined with interval exercise increases post-meal peptide tyrosine-tyrosine (PYY) levels, but neither intervention alters fasting PYY or des-acyl ghrelin levels.
When food is eaten after eating less for two weeks, the gut releases more of a hormone called PYY that tells the brain the body is full. This happens because the gut cells sense nutrients more strongly after a period of reduced calories, and exercise during this time does not change this effect. Other hunger-related hormones stay the same before and after meals.
What the research says
1 studyWhen women with obesity ate fewer calories—with or without exercise—their bodies released more of the fullness hormone PYY after meals, but the other hunger hormone mentioned (des-acyl ghrelin) stayed the same. So the study confirms the claim.
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.