People often miss meals because they get busy or are trying to lose weight. But how you skip meals, and the amount you eat at your next meal, can affect your overall health.
Think before you decide to skip your next meal.
The scientific data on skipping meals has been confusing. In some studies, fasting has resulted in measurable metabolic benefits for obese people, and in animal studies, intermittent feeding and fasting reduces the incidence of diabetes and improves certain indicators of cardiovascular health. Even so, several observational studies and short-term experiments have suggested an association between meal skipping and poor health.
In recent months, two new studies may help explain how skipping meals affects health.
The most recent study, published this month in the medical journal Metabolism, looked at what happens when people skip meals but end up eating just as much as they would in a normal day when they finally do sit down to a meal. The study, conducted by diabetes researchers at the National Institute on Aging, involved healthy, normal-weight men and women in their 40s. For two months, the study subjects ate three meals a day. For another eight-week period, they skipped two meals but ate the same number of calories in one evening meal, consumed between 4 p.m. and 8 p.m.
The researchers found that skipping meals during the day and eating one large meal in the evening resulted in potentially risky metabolic changes. The meal skippers had elevated fasting glucose levels and a delayed insulin response — conditions that, if they persisted long term, could lead to diabetes.
The study was notable because it followed another study earlier this year that found that skipping meals every other day could actually improve a patient’s health. In that study, published in March in Free Radical Biology & Medicine, overweight adults with mild asthma ate normal meals one day. This was followed by a day of severely restricted eating, when they ate less than 20 percent of their normal caloric intake, or about 400 or 500 calories a day — the equivalent of about one meal. Nine out of 10 study participants were able to stick to the eating plan.
这项研究是引人注目的，因为它遵循今年早些时候的另一项研究，研究发现，每隔一天不吃饭实际上可以改善病人的健康。这项研究3月发表正在《Free Radical Biology & Medicine》中，其中提到有轻度哮喘且体重超重的成年人每天进行正常的膳食。其次是一天的严格限制饮食，当他们吃不到百分之二十的正常热量摄取，或一天约400或500卡的热量-大约相当于一餐。十分之九的参与研究的人能够坚持饮食计划。
After following the alternate-day dieting pattern for two months, the dieters lost an average of 8 percent of their body weight, and their asthma-related symptoms also improved. They had lower cholesterol and triglycerides, “striking” reductions in markers of oxidative stress and increased levels of the antioxidant uric acid. Markers of inflammation were also significantly lower.
The conclusion, say the authors of the more recent meal-skipping study, is that skipping meals as part of a controlled eating plan that results in lower calorie intake can result in better health. However, skipping meals during the day and then overeating at the evening meal results in harmful metabolic changes in the body.