An early sign of Alzheimer’s can be noticed while showering: what should you pay attention to? | November 4, 2025

It’s often thought that the first signs of Alzheimer’s are solely related to memory: forgetting a name, having a word “on the tip of your tongue,” or becoming disoriented.

But a recent study has revealed a much more subtle—and unexpected—indicator that could be detected simply… while showering!

Yes, you read that right.

🧼 Not recognizing the smell of soap: a sign that shouldn’t be ignored

Imagine you open your usual shower gel, the one whose scent has been familiar to you for years, and suddenly… nothing.

Or perhaps, a vague, hard-to-identify smell.

This detail, which might seem insignificant, can be one of the first signs of cognitive decline, according to Professor Davangere Devanand, a psychiatrist and neurologist at Columbia University (New York).

Why does this happen?
Smell isn’t just about the nose: it’s a brain function closely linked to memory. The areas of the brain that allow us to recognize smells are among the first affected in the initial stages of Alzheimer’s.🔬 A simple but revealing test
In an eight-year study with over 1,000 participants, researchers used a very simple olfactory test:
They simply had to scratch scented samples and identify common smells like soap, smoke, rose, or leather.