Do walnut-enriched diets reduce VCAM-1 levels and improve blood vessel health in adults?
What the Evidence Shows
What we've found so far does not support the idea that walnut-enriched diets reduce VCAM-1 levels or improve blood vessel health in adults. Our current analysis shows the evidence leans against this claim.
We analyzed the available research and found one assertion suggesting walnuts might help blood vessels and reduce inflammation . However, this claim is not backed by supporting studies. Instead, we found 67.0 assertions that refute the idea, meaning the body of evidence we’ve reviewed does not show a beneficial effect of walnuts on VCAM-1 levels or vascular health in adults. Since no studies were cited to support the positive claim, and a large number of assertions argue against it, our analysis currently leans away from the idea that walnuts improve these markers.
We recognize that this does not rule out possible benefits in other areas or for other health markers. Our analysis is based only on what has been studied and reported so far, and it focuses specifically on VCAM-1 and blood vessel health. As new data becomes available, our understanding may change.
For now, if you're eating walnuts hoping to lower VCAM-1 or directly improve blood vessel function, the evidence we've reviewed doesn't support that expectation. Walnuts may still be a healthy snack for other reasons, but based on what we’ve seen, they don’t appear to have the effect on blood vessel health that some might expect.