Eating a handful of walnuts every day for six weeks might boost vitamin B6 levels in older adults who are otherwise healthy.

What we've found so far suggests that eating walnuts daily might be linked to higher vitamin B6 levels in older adults who are otherwise healthy. Our analysis of the available research shows this idea is supported by the evidence we’ve reviewed. We looked at one key assertion from the data, and it indicates that consuming a handful of walnuts each day for six weeks could increase vitamin B6 levels in older adults [1]. This finding is based on 64.0 supporting studies or data points, with no studies or data points refuting it [1]. While the evidence we’ve reviewed leans toward a positive effect, we only have a limited number of assertions to draw from so far—just one unique claim, even if backed by many supporting data points. We don’t yet know how large this effect might be, or whether it applies to all older adults, especially those with health conditions. We also don’t know if other factors—like overall diet, lifestyle, or medication use—might influence the outcome. Since we’re only working with what’s been shared so far, our current analysis is incomplete. As more data becomes available, our understanding may change. Vitamin B6 is important for brain function, immunity, and making red blood cells. Walnuts are a plant-based food rich in healthy fats, fiber, and various nutrients, which might explain why they could play a role in supporting vitamin levels. Practical takeaway: If you're an older adult and enjoy walnuts, adding a handful to your daily diet might support your vitamin B6 levels—but it’s just one piece of a bigger health picture.