Unfortunately, this is just another example of bad reporting of scientific research. The study was on blood glucose levels after meals and didn't focus on weight. Although it is possible that future research may link the two, this particular study does not.
A very good analysis of the study and press reporting around it is here:-http://
www.nhs.uk/news/2015/11November/Pages/One-diet-doesnt-fit-all–people-metabolise-food-differently.aspx
I thoroughly recommend checking the
www.nhs.uk/news site whenever there is a big health story in the news. Many journalists are good at writing but not very good at science so they frequently misinterpret scientific publications. The writers for
www.nhs.uk/news are scientific experts but also good at communicating. If your'e not keen on the details, just skip to the conclusions at the end of the article.
