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 » What's actually in McDonalds' chicken McNuggets? What 100 calories of fruit looks like 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.'" Reuters More in Diet and nutrition US Congress to review genetically modified labelling More: Diet and nutritionNews SPONSORED: So many prizes! Click through and see our fantastic competitions. advertisement Get a quote Momentum - save up to 35% on healthcare advertisement Read Health24’s Comments Policy Comment on this story 1 comment Add your comment Thank you, your comment has been submitted. Logout Comment 0 characters remaining Share on Facebook Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news Medical Sierra Leone's top doctor dies of Ebola News Life expectancy in SA drops by 4.3 years Medical 5 interesting facts about osteoporosis Medical Removing blood clots improves stroke recovery Medical Neurologists unsure on use of medical marijuana for brain disorders Medical 'Clot-grabbing' improves outcome for stroke patients From our sponsors Uncontrolled periodontal disease and diabetes – a collective health risk? Exam stress – a challenge for the whole family Eduloan offers affordable education finance Live healthier Medical bills » GP and money Cut medical bills Medical savings account Medical scheme: what is a self-payment gap? Have you exhausted your day-to-day benefits and moved into your self-payment gap? Here's what it means. Allergy alert » Allergy myths Cold or allergy? Children and allergies Allergy facts vs. fiction Some of the greatest allergy myths and misconceptions can actually be damaging to your health.