In 2021, a research team from the Harvard School of Public Health published a 20-year follow-up study in the Nutrients.

Researchers have found that consuming more than 5 walnuts (28g per serving, which is approximately 2-3 walnuts) per week can significantly reduce mortality and extend lifespan. Eating 2-4 servings of walnuts per week can help reduce the risk of death caused by cardiovascular disease. For individuals with a low dietary quality, consuming even a small amount of walnuts per week may help extend their lifespan.

The two major functions of walnuts cannot be ignored.

1. Protect blood vessels and reduce levels of "bad cholesterol."

2. Combat aging and eliminate oxygen free radicals