Eating the equivalent of one cup of cranberries per day for 12 weeks improved memory and brain function and lowered LDL cholesterol in 50 to 80-year-old adults.

A receptor found on neural stem cells known as the insulin receptor (INSR) is found to be vital for brain stem cell longevity and cognitive function.

Sleep deprivation disrupted corneal stem cell turnover and altered the composition of the protective tear film of the cornea, reducing the tear film antioxidants in sleep-deprived mice. 

Elevated body mass index (BMI) may contribute to abnormalities in aging sperm cells. Some older men showeda very limited ability to develop sperm cells; these men were all found to have obese BMIs.