The daily snack that could help with depression in older adults

Key Points:

• Depression affects up to one in three older adults, especially those with health issues like heart disease, cancer, mobility limitations, or sleep problems, but it is not a normal part of aging.
• A Boston pilot study involving 18 participants aged 65 and older found that daily consumption of freeze-dried blueberry powder for three months led to improvements in depressive symptoms, though results were not statistically different from the placebo group.
• Researchers suggest blueberries may influence mood by altering the gut microbiome, increasing enzymes like polyamine-transporting ATPase that could boost GABA, a neurotransmitter linked to calming the nervous system and often found at lower levels in people with depression.
• The study's small, homogenous sample limits conclusions, and researchers call for larger, more diverse trials to confirm findings and better understand blueberries' potential role in mental health.
• Experts caution against relying on supplements like psychobiotics for mood improvement without more evidence, recommending instead dietary improvements such as reducing junk food intake.