Baking Soda for Nail Fungus
Most baking soda remedies for nail fungus rest on one claim: that fungus can’t survive in an alkaline environment, so dusting or soaking with baking soda should stop it. It’s a neat theory. The evidence to back it up, unfortunately, doesn’t really exist.
Where the theory comes from
Some fungi do grow more slowly in alkaline lab conditions, which is where this idea traces back to. The leap from “fungus grows more slowly on a lab plate at a certain pH” to “sprinkling baking soda in your shoes cures an established nail infection” is a big one, and there’s no clinical trial testing it directly on nail fungus in people.
Where it might genuinely help — indirectly
Baking soda is a decent, cheap odour absorber, and keeping shoes and socks dry and less hospitable to fungus in general is a legitimate part of prevention. Used as a shoe powder to help manage moisture, it’s a reasonable habit. Used as a claimed treatment for the infection itself, it’s overselling what a mild alkaline powder can realistically do to an infection living under a hard nail plate.
What it won’t do
- Penetrate a thickened nail to reach fungus living underneath.
- Reverse discolouration or thickening that’s already happened — only new nail growth does that.
- Replace a treatment with actual clinical trial data behind it.
It’s low-risk and cheap enough that using it in shoes as a drying aid costs you nothing, but building a treatment plan around it as the main approach is likely to leave the actual infection untouched for months. See home remedies for nail fungus: which ones work for the options with better support.
Frequently Asked Questions
Can baking soda irritate the skin around a nail?
It’s generally mild, but a strong paste left on for long periods can be drying or irritating for some people — a dusting in shoes is lower-risk than a direct paste on skin.
Is baking soda better than commercial shoe deodorisers?
It’s a reasonable, cheap alternative for odour and light moisture absorption, though neither replaces properly drying shoes between wears.
Does mixing baking soda with tea tree oil improve results?
There’s no evidence the combination outperforms tea tree oil alone against the infection itself, though it’s a common home mix.
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