AnnaMaria
Most people think Alzheimer’s disease starts with memory problems—a forgotten name or a lost sense of direction. But new research reveals a much subtler, surprising early sign: not being able to smell your usual soap in the shower.
Losing the Scent: What It Means
Picture this—you reach for your favorite shower gel, but suddenly, the familiar scent is missing or feels oddly faint. According to Professor Davangere Devanand at Columbia University, this loss of smell could be one of the first signs of cognitive decline. Smelling is closely tied to the brain’s memory functions, and Alzheimer’s can impact the parts of the brain responsible for recognizing scents.
How Smell Testing Works
In a study lasting eight years and involving more than 1,000 people, researchers used a simple smell test. Participants tried to identify everyday scents—like soap, smoke, rose, or leather. Those who struggled to name these smells were more likely to develop cognitive issues down the line.
Scoring less than 8 out of 12 on this test was seen as a warning sign. When combined with a basic memory check, this scent test was as helpful as brain scans for predicting risk.
Why This Matters
The beauty of this test is its simplicity: it’s quick, non-invasive, and affordable. It can be done at a doctor’s office—no fancy equipment needed. Early detection means earlier treatment and more time for prevention.
Dr. Jeffrey Motter, a co-author of the study, believes adding smell tests to routine checkups could transform how Alzheimer’s is detected, giving hope to patients and families.
Scents That Matter
The smell test looks at 12 common scents. Here’s what to watch for if you find it hard to recognize several:
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Non-food smells: soap, leather, lilac, smoke, gas, rose
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Food smells: cherry, clove, strawberry, menthol, pineapple, lemon
If you repeatedly miss these scents—especially something as familiar as soap—and notice other changes like memory slips or confusion, it’s smart to check in with your doctor.
Sometimes, what you notice in the shower could be your brain’s way of asking for attention. Little details can make a big difference.
