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Late-night screen light, irregular meal timing and short sleep worsen insulin resistance faster than most diets improve it.
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Even a few nights of short or mistimed sleep reduce insulin sensitivity, increase appetite and raise evening sugar responses. For type 2 diabetes and hypertension, irregular sleep often explains why a 'good diet' still leaves numbers high.
The evidence is strongest for consistency: same wake time, dark room, morning light and no food within 2–3 hours of sleeping.
Summarises widely replicated findings without specific invented percentages.
BHG Newsroom — circadian-metabolism research summaryOfficial source
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