A small 2010 study in the Journal of Agricultural and Food Chemistry found that daily consumption of concentrated wild blueberry juice for three months improved memory function in older adults experiencing cognitive decline. Blueberries contain polyphenolic compounds known as anthocyanins, which have antioxidant and anti-inflammatory effects that mitigate neurodegeneration.
For grieving individuals who are experiencing memory issues as a result of grief, daily consumption of wild blueberry juice might be a nutritional consideration to discuss with your primary care provider.
Source: Krikorian, Robert, et al. Blueberry Supplementation Improves Memory in Older Adults. 14 Apr. 2010, www.ncbi.nlm.nih.gov/pmc/articles/PMC2850944/.