Tree nuts have been shown to have some highly beneficial and unique health effects. In some cases this relates to the minerals they contain, in other cases it relates to the fatty acids they contain. There is also a role for the vitamins, antioxidants and fibre present in tree nuts in human health. In some cases all of these factors likely play a role, and this may be so when considering the effects of tree nuts on metabolic syndrome. For example, researchers have assessed the effects of a single serving of walnuts on subjects with health level of blood lipids. The results of the study showed that following ingestion of the nuts, the selenium levels in the blood rose. There was also a significant reduction in low density lipoprotein and a significant increase in high density lipoprotein, a favourable shift in the ratio of blood lipids that is associated with significant health effects. Therefore a single serving of Brazil nuts may confer significant health benefits in the short-term suggesting regular consumption may improve long-term health.
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