Walk down any skincare aisle and you’ll see it everywhere:
“fragrance-free,” “for sensitive skin,” “gentle.”
It sounds reassuring. And it’s not wrong.
But in clinic, it’s also not enough.
What we actually see
In patch testing clinics, patterns emerge.
Patients come in with reactive skin, rashes, or skin that just won’t settle—
even though they’re using products labeled for sensitive skin.
When we test for contact allergens, the results are often surprising.
It’s not always fragrance.
It’s ingredients that are commonly considered “safe,” or even “soothing”:
- Alkyl glycosides (often used in sensitive skin products)
- botanical extracts like chamomile or lavender
- preservatives that don’t make the “clean beauty” blacklist such as propylene glycol
These aren’t inherently “bad” ingredients.
But they are frequent sensitizers—especially with repeated exposure over time.
And that’s the part most people don’t realize:
Skin doesn’t always react immediately.
It remembers.
