Many previous studies have found that people who skip breakfast are more likely to gain weight.
On January 19, a Japanese retrospective cohort study published in Nutrients magazine found that for college students, skipping dinner is an important cause of weight gain, and skipping breakfast and lunch has nothing to do with weight gain.
Researchers pointed out that eating regularity is the key to preventing obesity, but the relationship between dinner and obesity needs further research.
The study included 26,433 college students from Osaka University, Japan who underwent a health check upon admission from 2007 to 2015, of which 66.5% were male.
During an average observation period of 3 years, 10.8% of boys and 17.1% of women gained ≥10% weight.
Among the boys who ate dinner every day, 10.7% had a weight gain of ≥10%, while among the boys who often skipped dinner, 14.7% had a weight gain of ≥10%; among the girls, the ratios were 16.9% and 22.9, respectively. %.
Poisson regression analysis adjusted for multiple potential confounding factors showed that skipping dinner for both boys and girls was a significant predictor of weight gain and overweight or obesity (body mass index ≥25 kg/m2), but breakfast and lunch were associated with weight gain Irrelevant.
The risk of weight gain increased by 45% for boys who often skip dinner, and 67% for girls.
The risk of overweight/obesity increased by 74% for boys who often skip dinner, and 68% for girls.
Researchers believe that one of the possible mechanisms associated with skipping dinner and weight gain is that after skipping dinner, appetite will increase, but will eat more later, so the total energy intake is higher.
Another possible mechanism is: poor diet. Studies have shown that skipping dinner will lead to a decrease in the healthy eating index, and the lower the quality of healthy eating, the higher the body mass index.
Compared with people who skip breakfast, those who skip dinner eat less vegetables and seafood/plant-derived protein, while eating less vegetables and fish is associated with weight gain.
The third possible mechanism is the chronotype. Surveys show that people who often skip dinner tend to sleep late, while those who sleep late are more likely to gain weight.
Among college students included in the study, 1.5% of boys and 4% of girls often skip dinner.
Compared with students who eat dinner every day, those who often skip dinner are older, have a higher proportion of overweight, shorter sleep time, a higher proportion of smokers and drinkers, skip breakfast and lunch are more common, and eat dinner time later.