Two collaborative studies (1,2) from the Agricultural Research Service and the National Institute on Aging offer a look at the physiological effects of 3 meals versus 1 meal a day in two crossover groups. The volunteers participated in both diet plans for two eight weeks periods.
The first study analysis showed that consuming a one-meal-per-day diet, rather than a traditional three-meal-per-day diet, is feasible for a short duration. It showed that when the volunteers were ‘one-mealers,’ they had significant increases in total cholesterol, LDL ‘bad’ cholesterol and in blood pressure, compared to when they were ‘three-mealers.’ The changes in cardiovascular disease risk factors occurred despite the fact that the one-mealers saw slight decreases in their weight and fat mass in comparison to when they were three-mealers…
Further analysis of the study group showed that when the volunteers were one-mealers, they had higher morning fasting blood sugar levels, higher and more sustained elevations in blood sugar concentrations, and a delayed response to the body’s insulin, compared to when they were ‘three-mealers.’
via USDA ARS