Sweat itself is clear, but when sweat patches get on your clothes and dry, the salt, proteins and oils in your sweat may leave a residue. This usually disappears with normal machine washing.
What causes yellow sweat stains?
Yellow sweat stains occur when sweat patches are left to dry and not washed for a long time, or if there’s a build-up of antiperspirant or deodorant product mixed in.
Over time, the aluminium in the product and the salt in your sweat combine to form yellow armpit sweat stains, which are harder to remove with normal washing.
How do I get deodorant stains?
Deodorant stains (or white marks) on clothes can come from your deodorant or antiperspirant product. Some products transfer easily to your clothes and leave marks as you dress.
Other products, like Sure®’s Invisible range, are specially designed to reduce deodorant stains on your clothes and to prevent the build-up of yellow stains. This means you still get great protection for you and your favourite clothes.