If all that you demand of what you eat is that it is healthy and tastes good, macadamia nuts are a wonderful choice for those of us who have diabetes. But no food is perfect.
Unlike all other nuts, eating macadamia nuts won’t wreck your ratio of omega 3 to omega 6 fats, which are both polyunsaturated fats. The absolute amount of polyunsaturated fats in even a large amount of macadamias is so low that relative amount need not be a concern. As long as we get a ratio of 1:1 or even twice as much omega 6 and omega 3 in our total diet we are doing fine. We can do that by eliminated from our diet soybean, corn, canola, and cottonseed oils and by eating fatty fish like salmon or sardines or mackerel or by taking fish oil or krill oil capsules.