As people get older, their brain makes less of a helpful protein called BDNF, which can make it harder to remember things and learn new stuff, and may raise the chance of dementia.
Scientific Claim
Aging is associated with reduced levels of brain-derived neurotrophic factor (BDNF), which is linked to decreased synaptic plasticity, impaired memory and learning, and increased risk of cognitive impairment and Alzheimer's disease.
Original Statement
“Aging-related loss of BDNF has been associated with reduced synaptic plasticity, memory and learning as well as increased risk of cognitive impairment and Alzheimer's disease.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The abstract uses 'associated with', which is correct for a narrative review summarizing other studies. No original data or causal design is claimed. Verb strength is appropriately conservative.
Evidence from Studies
Supporting (1)
Unknown Title
This study says that as people get older, their brains make less of a helpful protein called BDNF, and that’s linked to worse memory and a higher chance of diseases like Alzheimer’s — which is exactly what the claim says.