Many studies have shown that the body's internal biological clock plays an important role in weight control. Eating meals that are out of sync with the body's biological clock, such as irregular meal times, will disrupt the metabolism and hinder weight loss efforts, according to the health website Medical News Today (UK).

The body's biological clock, or circadian rhythm, operates on a 24-hour cycle. This biological clock regulates sleep, digestion, hormone secretion, and metabolism. Irregular eating times, especially in the evening, can affect food processing and lead to weight gain.

Eating late at night can cause more fat to accumulate.

A study published in the journal Obesity found that people who eat the same high-calorie meal after 8 p.m. are more likely to gain weight than those who eat it in the morning. This is mainly because the body tends to burn fewer calories and digest food more slowly at night than during the day. In other words, eating late at night can cause more fat to accumulate.

In addition, eating at irregular times, especially eating late at night, also causes many effects on the body. One of the biggest effects is reducing fat oxidation. This is the process by which the body burns fat for energy. When fat oxidation is reduced, the body will store more excess fat, leading to weight gain over time.

Additionally, insulin sensitivity, or the body's ability to control blood sugar, also decreases in the evening. Research published in the Journal of Clinical Endocrinology and Metabolism found that the body processes sugar less efficiently in the evening than in the morning. This leads to higher blood sugar levels and increased fat storage when eating late at night.

To optimize weight loss, experts recommend that meals should be eaten on time and avoid irregular eating. In addition, dinner should be avoided within 2-3 hours before bedtime. Ideally, it should be eaten before 7 p.m., according to Medical News Today .