Nutrition · Moderate evidence
Meal Frequency and Eating Window
Eating more or fewer times per day does not change weight loss when calories are equated; restricting the eating window helps only to the extent that it reduces intake.
Meta-analyses and 12-month randomized trial · 3 sources · 2 min
What the studies show
- Meal frequency had no consistent effect on body weight or body composition.
- Caloric restriction with or without an 8-hour window produced the same weight loss over one year.
- A restricted window reduced weight and body fat in a meta-analysis while preserving lean mass, likely due to eating less.
How Letz applies it
Letz lets users choose how many meals to eat and adjusts portions accordingly, distributing protein across 3 to 5 meals; it does not market fasting as a superior method.
Numbers derived from this rule
| Parameter | Range | Weight | Rule |
|---|---|---|---|
| Protein meals per day | 3–5 meals | 40% | The number of meals does not affect weight; distributing protein across 3 to 5 meals improves its utilization.Distribute protein throughout the day · Nutrient timing and the anabolic window · Meal Frequency and Eating Window |
Who it applies to
Adults in weight-loss programs.
Limits
A restricted window may make protein distribution harder; diabetes and medication require medical guidance.
Sources
- Schoenfeld, Aragon & Krieger, Nutrition Reviews, 2015 DOI 10.1093/nutrit/nuu017
- Liu et al., New England Journal of Medicine, 2022 DOI 10.1056/NEJMoa2114833
- Moon et al., Nutrients, 2020 DOI 10.3390/nu12051267
More in Nutrition
- Protein and Training AdaptationSufficient protein can support gains in lean mass and strength alongside training; the response varies and does not increase indefinitely with higher intakes.
- Higher Protein Intake During a Calorie DeficitIn a deficit, higher protein protects lean mass and can even allow muscle gain alongside intense training; the effective range rises to approximately 1.6 to 2.4 g/kg.
- Rate of weight lossLosing weight slowly, at around 0.5 to 1% of body weight per week, better preserves lean mass, strength, and metabolic rate compared to rapid weight loss.
- Distribute protein throughout the dayDividing protein into servings of around 0.4 g/kg across four or more meals stimulates protein synthesis more than concentrating everything into one or two.