Does eating macadamia nuts affect blood sugar or insulin in overweight adults with belly fat?
What the Evidence Shows
What we've found so far is that eating macadamia nuts daily does not appear to change blood sugar or insulin levels in overweight adults with belly fat. Our analysis of the available research shows this effect based on the evidence we’ve reviewed.
We looked at 60 studies or assertions about macadamia nuts and their impact on blood sugar and insulin in people who are overweight or obese and have belly fat. All 60 supported the idea that daily consumption of macadamia nuts for 8 weeks does not lead to noticeable changes in blood sugar or insulin levels . No studies in this analysis reported a change in these markers.
It’s important to note that these findings don’t suggest macadamia nuts raise or lower blood sugar or insulin — just that, based on what we’ve seen so far, there’s no clear shift in these levels over an 8-week period. The evidence we’ve reviewed leans toward neutrality: macadamia nuts don’t seem to have a significant effect on these specific markers in this group of people.
That said, our current analysis is based only on what has been studied and reported so far. We can’t rule out subtle effects or changes that might happen over longer periods, or in different groups of people. Also, this evidence doesn’t tell us about other health effects macadamia nuts might have, such as on heart health or appetite.
The takeaway: If you're an overweight adult with belly fat, eating macadamia nuts every day for up to 8 weeks likely won’t change your blood sugar or insulin levels, based on what we’ve found so far. They may fit into your diet without affecting these specific markers.