What Does Science Say?
The study, conducted by a team of researchers from Universidad de Murcia, included more than 420 people who followed the same weight-loss diet. Participants were divided into two groups – those who ate lunch before 3 p.m., and those who ate after 3 p.m.
The results showed that those who ate earlier lost, on average, 2.2 kilograms more than those who ate later. Additionally, they had better insulin sensitivity (the hormone that regulates blood sugar) and more stable energy levels throughout the day.
Why Is Lunch Time Important?
Eating your main meal late in the day can affect your metabolism – the way your body processes food and turns it into energy. When we eat later, the body may not use all the consumed energy and instead stores it as fat.
Researchers believe the main reasons for this phenomenon are:
- The Body’s Biological Clock Our body runs on a circadian rhythm (an internal clock), which affects metabolism. Food eaten later in the day is metabolized more slowly.
- Hormone Levels Eating earlier helps regulate leptin (the satiety hormone) and ghrelin (the hunger hormone), which means fewer hunger attacks late at night.
- Calorie Burning Studies show that people who consume most of their calories earlier in the day burn more energy and have an easier time controlling their food intake.
In addition to the Spanish study, research published in the journal Obesity showed that those who consumed most of their daily calories before 1 p.m. lost 25% more body weight than those who ate the same amount of calories later in the day.
Another study conducted by Harvard T.H. Chan School of Public Health found that people who eat later often burn less energy, have a stronger desire for unhealthy snacks, and experience poorer sleep quality.
How to Adjust Your Meal Schedule?
If you want to try this weight-loss strategy, try the following:
- Eat Breakfast Earlier Instead of skipping breakfast, enjoy a healthy meal between 7 and 9 a.m.
- Have Lunch Before 3 p.m. Plan your main meal in the early afternoon to boost your metabolism.
- Make Dinner Light and Early Ideally, finish dinner by 7 p.m. at the latest.
- Limit Late-Night Snacking Night snacks can hinder the fat-loss process.
If you want your lunch to support weight loss, try:
- Proteins: chicken, fish, tofu, lentils, eggs
- Healthy Fats: avocado, olive oil, nuts
- Complex Carbohydrates: quinoa, brown rice, whole-grain bread
- Vegetables: broccoli, spinach, bell peppers, cucumbers









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