Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Tree nuts, including almonds, walnuts, pistachios, and others, have been studied for their effects on blood lipid profiles, including triglyceride levels. Multiple clinical trials and meta-analyses have shown that regular consumption of nuts can have a beneficial effect on cardiovascular risk factors, with some studies specifically noting a reduction in triglyceride levels. For example, a 2015 meta-analysis published in the American Journal of Clinical Nutrition found that nut consumption (particularly walnuts and almonds) was associated with a modest but statistically significant reduction in triglycerides.

The mechanism is thought to involve the healthy unsaturated fats, fiber, and bioactive compounds (such as phytosterols and polyphenols) found in nuts, which can improve lipid metabolism and reduce inflammation. However, the degree of triglyceride reduction is generally small, and effects may vary depending on the type and quantity of nuts consumed as well as the baseline diet of individuals.

While traditional medicine systems may not have specifically targeted high triglycerides with tree nuts, the scientific evidence supports their use as part of a heart-healthy diet. Most guidelines recommend nuts for overall cardiovascular health, which includes management of blood lipids. However, the evidence is moderate and not as strong as for some other interventions, hence the rating of 3.

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