Research shows why we should be going nuts for weight loss

Research from the University of South Australia shows that including nuts in calorie-controlled weight loss diets doesn’t hinder weight loss, and instead may have the opposite effect.

Analysing the findings of seven randomised controlled trials that assessed weight changes and glycaemic control in energy-restrictive (ER) diets, researchers found that none of the studies produced an adverse effect to weight loss when nuts were included as part of the diet.

Instead, four out of the seven studies showed that people who ate 42–84 g of nuts as part of an ER diet achieved significantly more weight loss than those on ER diets without nuts. Weight loss from the ‘nut-enriched’ ER diets achieved an extra 1.4–7.4 kg, which may be related to the ability of nuts to help curb hunger efficiently.

Interestingly, in the studies that showed no difference in weight loss between ‘nut-enriched’ and ‘nut-free’ ER diets, the diets typically included fewer nuts.

UniSA researcher Professor Alison Coates says nuts are a nutrient-rich food that should be included in weight-loss diets.

“People often avoid nuts when trying to lose weight because they think that the energy and fat content in nuts can contribute to weight gain,” Coates said.

“But in fact, nuts are rich in healthy unsaturated fats, plant protein and dietary fibre, all of which play a role in promoting satiety and reducing excess calorie consumption. Nuts are associated with improved cardiovascular and metabolic health, better gut health and enhanced cognitive performance.

“Despite this, most Australians do not eat enough nuts, and 60% report eating none at all.

“If weight gain was a concern discouraging people from eating nuts — rest assured that this is not the case. Nuts do not cause weight gain. Furthermore, they do not adversely affect weight loss, rather they appear to assist it.”

Dr Sharayah Carter, a co-author of the study, said the study’s results are welcome news for nut lovers everywhere.

“Nuts are an important part of many people’s diets because they provide a taste and texture you can’t find in other food groups, while also being a healthy, on-the-go snack,” Carter said.

“For people who enjoy eating nuts, knowing that they can help meet weight-loss goals while also improving their overall health is a huge plus. It’s also great for health professionals who can be confident in recommending nuts, in the context of a healthy diet, without concerns of an adverse effect on weight.”

Read the full findings here.

Image credit: iStock.com/Mykola Sosiukin