Overview
- Researchers at Northwestern University reported that stopping meals at least three hours before bedtime over roughly 7.5 weeks lowered night-time blood pressure by about 3.5%, reduced night heart rate by around 5%, and improved glucose tolerance and insulin sensitivity without requiring fewer calories.
- A controlled trial cited in Clock & Sleep found that eating at 10 pm versus 6 pm raised overnight blood sugar and reduced fat oxidation, signaling greater metabolic strain and poorer sleep quality with late meals.
- Experts synthesize the evidence into practical guidance to finish the last meal two to three hours before sleep, with a common dinner window of about 5–7 pm to align eating with circadian rhythms.
- Registered dietitians caution against skipping dinner for weight loss, noting that irregular meal timing can slow metabolism, destabilize blood sugar, and drive later overeating.
- Personalization remains key, with post-workout protein and carbohydrate soon after exercise or a small pre-sleep protein snack suggested for heavy training schedules or low daily calorie intake.