“Meaning: A low-fat plant-based diet is an effective tool for reducing body weight and increasing insulin sensitivity and postprandial metabolism.
The study found that adults with excess body weight and insulin resistance (which can lead to type 2 diabetes and other major health problems) benefited by going on a low-fat plant- based diet.
The study’s objective: To measure the effects of a low-fat vegan diet on body weight, insulin resistance, postprandial metabolism, and … lipid levels in overweight adults.
The study measured results among 244 people aged 25 to 75 with a body mass index of between 28 to 40. Then 122 people were asked to follow a low-fat vegan diet and the control group of 122 were asked to make no diet changes for 16 weeks.
After 16 weeks, body weight was measured using a calibrated scale. Body composition and visceral fat were measured by a density test while Insulin resistance was assessed with the homeostasis model. And the thermic effect of food was measured by indirect calorimetry over 3 hours after a standard liquid breakfast in 44 participants.
Over the 16 weeks, among those eating the low-fat vegan diet, they lost weight, (nearly 6 kg), while their metabolism shot up 14% and their insulin sensitivity improved. Meanwhile their lipid levels went down by 34.4%, None of these variables changed significantly in the control group.
Bottom Line: Going on a low-fat plant-based diet reduces body weight by reducing energy intake and increasing metabolism after eating. The changes are associated with reductions in blood lipid levels and a healthy increased insulin sensitivity.