
The science·4 February 2026
How a drug-free nasal barrier actually works
Barrier sprays do not enter the bloodstream or block histamine. So how do they help? A look at the physics happening just inside your nose.
Bentrio editorial team6 min read
Practical reading on allergens, nasal health, and the science of drug-free protection – from the people who make Bentrio.

Barrier sprays do not enter the bloodstream or block histamine. So how do they help? A look at the physics happening just inside your nose.

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