Home > Diet and nutrition > News Updated 29 April 2013 Adding nuts is a healthy choice People can safely add a few nuts to their diet without gaining weight, a new review of past studies suggests. 1 iStock Related Eat nuts to stay healthy and lose weight Go nuts for your health Pistachios have weight, heart benefits Check Glycaemic index tool » Count Calorie counter » Quiz Ready for weight loss? » Ask DietDoc » Your quick guide to Banting 10 foods with hidden fat People can safely add a few nuts to their diet - or replace other foods with the high-unsaturated fat, high-fibre snacks - without gaining weight, a new review of past studies suggests. Researchers combined data from 31 trials conducted across the globe and found that on average, there was very little difference in changes in weight or waist measurements between people who were put on a normal or a nut-supplemented diet. Lower risk of death "Most of the nut-enriched studies don't show that patients gain a significant amount of weight, in contrast to what one might think," said Dr. David Bleich, head of Endocrinology, Diabetes and Metabolism at the University of Medicine and Dentistry of New Jersey in Newark.Gemma Flores-Mateo from the Institut Universitari d'Investigacio en Atencio Primaria Jordi Gol in Tarragona, Spain and colleagues said previous research has tied nut-containing diets to a lower risk of death, diabetes and high blood pressure. Bleich, who wasn't involved in the new report, said his own work has shown measures of insulin resistance - a diabetes predictor - were lower when people added nuts to their diets."One would generally think if you're increasing the 'fat content' of the diet, you might in fact make insulin resistance worse," he told Reuters Health. "It speaks to this issue of the quality of the fats that we consume."Nuts may also suppress hunger because of their unsaturated fats, fibre and protein, the researchers noted. In the trials they looked at, participants were randomly assigned to a normal diet or one that included extra nuts - or, more often, nuts substituted for other food items - and followed for anywhere from two weeks to five years. At the end of follow-up, people on nut diets had dropped about 1.4 extra pounds (0,63kg) and lost close to half an inch (1,27cm) off their waists, compared to those in the nut-free groups. However, the differences could have been due to chance."Although the magnitude of these effects was modest, the results allay the fear that nut consumption may promote obesity," Flores-Mateo's team wrote last week in the American Journal of Clinical Nutrition. "Our findings support the inclusion of nuts in healthy diets for cardiovascular prevention." Eat one serving of nutsHowever it's not simply a matter of "throwing additional nuts into your already poor-quality diet," Bleich said. He said heart protection comes from looking at a fuller picture of the diet - and adding fruits, vegetables and olive oil, for example, in addition to nuts. Dr. Adam Gilden Tsai, an obesity researcher from the University of Colorado in Denver, said he wouldn't recommend people eat nuts on top of their normal diet, but that substituting them for other foods may lead to some benefits, such as on cholesterol levels. "It's fine to eat nuts if you can still limit your calories," Tsai told Reuters Health. But he cautioned that it can be hard for people to eat just one serving."Normally what I would say to a patient is, 'A small handful of nuts can be a very good and filling snack, but you have to be very careful because it's high in calories.'" More in Diet and nutrition HPCSA to say why they instituted a disciplinary inquiry against Noakes More: Diet and nutritionNews advertisement Read Health24’s Comments Policy Comment on this story 1 comment Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news Diet and nutrition HPCSA to say why they instituted a disciplinary inquiry against Noakes Lifestyle 10 common health warnings you should not ignore Lifestyle No more smoking anywhere at DHL Newlands stadium News Department of health denies allegations of frozen posts Medical Sierra Leone discharges last known Ebola patient Medical Fentanyl: drug 50 times stronger than heroin causing havoc in US From our sponsors Why probiotics are beneficial for IBS Hearing aids on a windy day? No problem! A step-by-step guide on how to do pelvic floor exercises correctly Live healthier Perfect parent » Parents boost kids' social skills Parent with ADHD? Why baby wakes at the night Top tips on parenting Browse through Health24's parenting guide for all you need to know about parenthood. Strong, healthy hair » 10 interesting facts about your hair Weird remedies for hair loss Causes of hair loss Healthy hair diet Sound nutrition can improve the health of your hair and give you lustrous locks.