It has been shown that only ½ to 1 ounce/day for 5 days , out of the 7day week, results in 60+ years old men and women having just the right amount of plant based linolenic acid to help the endothelial layer of blood vessels: blood pressure heads toward normalization, blood sugar is controlled in type II diabetes,as measured in FBS (fasting blood sugar) and the 3 month blood sugar measure by HA1C (hemoglobin A one C), the levels of LDL and VLDL cholesterol are decreased, and walnuts actually contribute to weight loss in the obese. Lastly, but not least, one lab study showed walnuts inhibited breast cancer growth by 63% and colon cancer cells growth was inhibited by 51%. Many animal studies , however, have shown walnuts, compared with placebo, inhibit tumor development ; also, the growth and size of the tumor is decreased.

Source:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401409/

Eating Walnuts may EXTEND your Life, Michael Downey, April 2022, pp32-38, Life Extension Publications