14:10 Intermittent Fasting: How It Works

In 30 seconds

14:10 intermittent fasting means fasting for about 14 hours and eating within a 10-hour window each day, for example from 8 am to 6 pm. In trials, time-restricted eating led to modest weight and cardiometabolic changes, similar on average to other schedules. If 10 hours feels tight, 12:12 is a gentler start.

• 14:10 is about 14 hours of fasting and a 10-hour window, for example 8 am to 6 pm.
• Trials found modest weight and cardiometabolic changes, similar on average across fasting schedules.
• Earlier windows improved insulin sensitivity and 24-hour glucose in small, short trials; results vary.
• No schedule is proven best for everyone; check with a clinician first if you have a medical condition or take medicines.

How does 14:10 work?

You eat within 10 hours and fast for about 14. If dinner ends at 6 pm, breakfast waits until 8 am, and most of the fast happens overnight.

A 14:10 schedule means fasting about 14 hours and eating within a roughly 10-hour daily window.Source 22

A sample 14:10 day

1. 6 pm to 8 am, about 14 hours

   Fasting

   No calories after an early dinner; the fast runs overnight.

2. 8 am to 6 pm, 10 hours

   Eating window

   Meals and caloric drinks stay inside the window.

Try a schedule

Example times. Nothing is saved.

Schedule

12:1214:1016:818:620:4

Last meal

8:00 PM

Fasting

14 h

Eating window

10 h

Fast ends

10:00 AM

Eating window: 10:00 AM to 8:00 PM. Hours on a clock are not a measurement of your body.

Open the fasting calculator

Will 14:10 help you lose weight?

It can, modestly, and about as much as other fasting schedules: trial syntheses find that ~10-hour windows can produce modest weight and cardiometabolic changes, and results depend on trial definitions, adherence and duration.

Time-restricted eating with a ~10-hour window can produce modest weight and cardiometabolic changes compared with unrestricted eating, trial syntheses find.Source 11

Trial syntheses depend on definitions, adherence, duration and indirect comparisons; they do not imply every fasting strategy is equivalent for every person.Source 11

A 2025 systematic review and network meta-analysis pooled randomized trials of intermittent-fasting strategies and found modest average effects on weight and cardiometabolic risk factors, noting heterogeneity in trial definitions, adherence and duration.Source 11

Is an earlier eating window better?

Possibly, for blood sugar, but the evidence is early. A five-week trial in eight men with prediabetes saw better insulin sensitivity with an earlier window, and a brief crossover saw better 24-hour glucose; the early vs late window guide covers the detail.

Early time-restricted feeding improved insulin sensitivity in a five-week prediabetes trial and 24-hour glucose in a brief crossover; these small studies suggest possible benefits for some people.Source 33Source 44

Controlled-feeding and short crossover trials found improved insulin sensitivity and 24-hour glucose with early time-restricted feeding. They were small and brief, so they hint rather than settle long-term effects.Source 33Source 44

What about autophagy? One of those trials saw gene-expression markers linked to autophagy shift, a hint rather than a measurement.

Short studies report gene-expression or biomarker changes sometimes linked to autophagy, but they are not direct whole-body measures and do not establish a specific hour when autophagy begins.Source 44

How do you choose a 14:10 window?

Wherever it fits your day: 8 am to 6 pm if you like an early dinner, or 11 am to 9 pm if your evenings run later. Comparisons between timings and window lengths are heterogeneous and none is proven best, so start from 12:12 if 10 hours feels tight, and see 16:8 if you want a longer fast.

Comparisons of timing and window length inherit heterogeneity from trial methods and populations; no eating schedule is proven universally optimal.Source 22

Who should check with a clinician first?

Talk to a qualified health professional before fasting if you are pregnant or breastfeeding, under 18, living with or recovering from an eating disorder, have diabetes, take insulin or a medicine affected by meal timing, are an older adult, or are acutely ill. Do not change the dose or timing of any medicine without your clinician. See Blimbi’s safety guide.

Related guides

• 12:12 Intermittent Fasting: How It Works

  12:12 intermittent fasting pairs a 12-hour eating window with a 12-hour fast. See a sample day, what trials found and who should ask a clinician first.

• 16/8 Fasting: How It Works and How to Start

  16/8 fasting (also written 16:8) means about 16 hours of fasting and an 8-hour eating window. See a sample day, how to build up to it and what trials found.

• 18:6 Intermittent Fasting: How It Works

  18:6 intermittent fasting means about 18 hours of fasting and a 6-hour eating window. See a sample day, what trials found and whether to go longer.

• Intermittent Fasting for Women: What the Evidence Shows

  Intermittent fasting for women: what small trials found on weight before and after menopause, what's known about hormones and periods, and who shouldn't fast.

Next steps

• Find a fasting schedule for your day

  Answer 3 quick questions and get a fasting schedule to try, with times that fit your day.

• When does my fast end?

  See the time remaining and an educational timeline. Hours on a clock are not a measurement of your body.

• Take the fasting quiz

  A few questions about your day, then a gentle place to start.

• Intermittent fasting protocols

  Compare the common schedules side by side.

Frequently asked questions

What is 14:10 intermittent fasting?

14:10 means fasting about 14 hours and eating within a 10-hour window each day. Where you place the window is up to you; timing can affect glucose in some trials.Source 22Source 33

Will 14:10 help me lose weight?

It can, modestly, but no schedule guarantees weight loss. Effects vary by study, adherence and person.Source 11

Does a 14-hour fast trigger autophagy?

Short studies report gene-expression changes linked to autophagy after early time-restricted feeding, but they are indirect measures and do not show when autophagy begins in the body.Source 44

Is 14:10 safe with diabetes or glucose-lowering medication?

Check with a clinician first. The trials were done in specific populations, and meal timing can interact with glucose medicines.Source 33Source 11

How do I start 14:10?

Shift your window gradually by 30 to 60 minutes, pick times that fit your routine, notice how you feel and keep balanced meals. If you have medical conditions or an eating-disorder history, check with a clinician first.Source 22Source 11

Sources

1. 1

   Intermittent fasting strategies and their effects on body weight and other cardiometabolic risk factors: systematic review and network meta-analysis of randomised clinical trialsZhila Semnani-Azad et al. BMJ, June 18, 2025.DOI: 10.1136/bmj-2024-082007 · PMID: 40533200Systematic review and meta-analysis

2. 2

   Effects of timing and eating duration of time restricted eating on metabolic outcomes: systematic review and network meta-analysisYu-En Chen et al. BMJ, January 21, 2026.DOI: 10.1136/bmjmed-2024-001071 · PMID: 41586347Systematic review and meta-analysis

3. 3

   Early Time-Restricted Feeding Improves Insulin Sensitivity, Blood Pressure, and Oxidative Stress Even without Weight Loss in Men with PrediabetesElizabeth F. Sutton et al. Elsevier BV, June 5, 2018.DOI: 10.1016/j.cmet.2018.04.010 · PMID: 29754952Human randomized trial

4. 4

   Early Time-Restricted Feeding Improves 24-Hour Glucose Levels and Affects Markers of the Circadian Clock, Aging, and Autophagy in HumansHumaira Jamshed et al. MDPI AG, May 30, 2019.DOI: 10.3390/nu11061234 · PMID: 31151228Human randomized trial

5. 5

   Fasting Safely with DiabetesMartin M. Grajower. National Institute of Diabetes and Digestive and Kidney Diseases, August 26, 2020.Official guidance

6. 6

   Weight gain in pregnancyNHS. NHS, July 6, 2022.Official guidance