Time-Restricted Eating (16:8)
Eat within an 8-hour daily window (e.g., 10 AM–6 PM). 16 hours of fasting improves insulin sensitivity, supports autophagy, and aligns eating with circadian metabolic peaks.
- Time
- Planning only
- Cost
- Free
- Equipment
- None required
- Min. Trial
- 4-8 weeks
Dosage & Timing
- Duration
- Ongoing
- Frequency
- Daily
- Best Time
- morning
Evidence Strength
4/5 — StrongStrong evidence from multiple RCTs. Sutton et al. (2018) showed early TRE improved insulin sensitivity and blood pressure even without weight loss. Wilkinson et al. (2020) demonstrated metabolic benefits in metabolic syndrome patients.
Overview
Confine all caloric intake to an 8-hour window each day, fasting for the remaining 16 hours. The eating window should ideally begin in the late morning (e.g., 10 AM–6 PM or 11 AM–7 PM) to align with circadian metabolism. This approach leverages the body's natural metabolic rhythms and allows sufficient fasting time for autophagy initiation and insulin sensitivity improvements.
Wellness education and routine support only. Review the evidence, caveats, and interactions before trying this protocol, and ask a clinician when medical conditions, pregnancy, medications, or symptoms are involved.
How To Do It
- 1
Choose your window
Pick an 8-hour eating window that fits your schedule. Earlier windows (e.g., 8 AM–4 PM) show slightly better metabolic outcomes but adherence matters most.
- 2
Start with 12:12
If new to fasting, start with a 12-hour window and narrow by 1 hour per week until you reach 16:8.
- 3
Stay hydrated during fast
Water, black coffee, and plain tea are fine during the fasting window. No calories.
- 4
Don't compensate
Eat normal-sized meals during your window. The goal is not caloric restriction but temporal restriction.
The Evidence
Each claim is linked to its source study. Confidence reflects the study design — systematic reviews and RCTs rank highest.
Early time-restricted feeding improves insulin sensitivity, blood pressure, and oxidative stress
Time-restricted feeding improved several cardiometabolic markers in men with prediabetes.
Source Context
Primary references behind the protocol summary.
Who Popularized This
Creator references are context only. LiveWell weighs evidence, safety notes, and routine fit separately from who discussed a protocol.
Interactions & Warnings
Review 4 contraindications and 2 interaction notes before adding this protocol to a routine.
Contraindications
- Type 1 diabetes
- Pregnancy or breastfeeding
- History of eating disorders
- Underweight individuals
Interactions
- Align eating window with social/family meal times for sustainability
- May affect medication timing — consult prescriber
What To Track
These are review prompts for your own routine notes, not expected improvements or medical outcome targets.
Routine actions change your saved plan after sign-in. The protocol guidance above remains wellness education, not a personalized recommendation or expected outcome.
Saved-plan controls for this protocol
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