What it is
Mechanism evidence: human
At a glance
What it is, why people use it, the evidence, and what to know before trying it.
Why people use it
- Convenient meal timing
- Longer overnight food-free interval
- Sleep comfort when dinner ends before bed
Evidence at a glance
Meal timing is a valid behavior to record, but Huberman described appetite-led timing rather than a named fasting protocol. Evidence from early time-restricted eating should not be pasted onto this later daytime window.
Confidence: weak
Safety notes
Known side effects, interactions and use limits from reviewed sources.
A compressed window can make it harder to meet energy or nutrient needs and may be unsuitable during pregnancy, growth, frailty, eating-disorder recovery, diabetes medication use or high-volume athletic training.
- History of an eating disorder without clinical guidance
- Glucose-lowering medication without clinician review
- Pregnancy or growth when intake is inadequate
Forms and variants
This review does not automatically apply to:
- early time-restricted eating
- one meal a day
- alternate-day fasting
- calorie restriction
Seen in protocols
Public protocols that include Daytime eating window. Open one to see the full context and source.