Scientists successfully reverse brain aging with nasal spray

From retinol creams to ice rollers, the anti-aging playbook may eventually add a new step: a nasal spray.

Scientists at Texas A&M have developed an experimental nasal spray designed to reduce brain inflammation, a key driver of long term cognitive decline including dementia.

Let’s break it down

The spray delivers extracellular vesicles, or tiny biological carriers packed with microRNAs, to the brain to help regulate gene activity.

• These vesicles travel through the nose via olfactory nerves, bypassing the blood-brain barrier that’s a major hurdle for many traditional treatments.
• Once there, the microRNAs reduce inflammation that builds up in key brain regions tied to memory and learning as people age.
• This age-related inflammation has been linked to brain fog, slower thinking, and higher risk of diseases like Alzheimer’s.

Early results pass the sniff test: In animal studies, just two doses of the nasal spray restored cognitive function within weeks. The treatment also showed similar effects across male and female subjects, which isn’t always the case in neuroscience research.

The potential impact: Roughly 500,000 US adults over the age of 55 are diagnosed with dementia each year, with that figure projected to double to 1 million/year by 2026. All told, studies show the risk of developing dementia at any time after age 55 among Americans stands at ~42%.

Looking ahead…Texas A&M has filed a patent for their new nasal spray, though human trials are still years away.