A comprehensive investigation spanning over two decades delved into the dietary habits of 136,432 individuals, with data collected through questionnaires. The study enrolled participants aged 65 or younger during the period from 1985 to 2014.
At the initiation of the research endeavor and subsequently every four years, participants furnished information pertaining to their medical history, personal attributes, and lifestyle choices. Over the course of this lengthy study, it was observed that, on average, individuals gained approximately 3.3 pounds (1.5 kilograms) every four years, cumulatively amounting to roughly 1.5 stone over a span of two decades.
The research outcomes disclosed a notable distinction in weight gain patterns based on the types of vegetables consumed. Those who incorporated potatoes, peas, and sweetcorn into their diets exhibited a higher propensity for weight gain compared to those who favored broccoli, carrots, and spinach. Specifically, individuals who opted for non-starchy vegetables like broccoli, carrots, and spinach were found to accumulate 6.6 pounds less weight than their counterparts who consumed starchy vegetables.
For those indulging in potatoes and sweetcorn, an approximate additional weight gain of 5.7 pounds was projected over the same time frame. It was further established that these associations held more sway among participants classified as having excessive body weight as opposed to those maintaining a healthier weight. Additionally, the link between vegetable choices and weight gain was more pronounced among female participants.
Furthermore, the study illuminated a strong correlation between increases in glycaemic load, which affects blood sugar levels, and weight gain.