GuideScience & Research
Does Your Metabolism Really Slow Down With Age?
A large study of how many calories people burn across the lifespan found adult metabolism steadier than most people expect. Here is what that does and does not mean.
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What the studies actually say about metabolism, appetite, hormones and weight.
GuideScience & Research
Set Point Theory: Does Your Body Defend a Certain Weight?
The idea that your body protects a preferred weight is popular, and only partly proven. Here is what scientists actually think.
GuideScience & Research
Leptin, Ghrelin and GLP-1: The Hormones Behind Hunger
Hunger is not just willpower. Three hormones help set when you feel hungry and when you feel full. Here is what each one does.
GuideScience & Research
Why Weight-Loss Plateaus Happen, and Ways to Work Through Them
Most people hit a stretch where the scale stops moving. Research points to a smaller body, a slightly slower metabolism and, above all, a stronger appetite.
GuideScience & Research
Sleep and Weight: How One Short Night Can Change Your Eating
In a controlled study, people on the same diet lost 55% less body fat when they slept 5.5 hours instead of 8.5. Here is what that means.
GuideScience & Research
Why Researchers Are So Interested in GLP-1 Medications
What GLP-1 is, what the STEP 1 and SURMOUNT-1 trials found, and the open questions scientists are still working on.