Switched to natural deodorant and ended up with red, itchy underarms? You're not alone, and it doesn't mean natural deodorant isn't for you. Usually it means the formula didn't suit your skin. This guide covers the two ingredients most often behind the problem, how to test a new deodorant, and the baking-soda-free and unscented options we stock.
Key takeaways
- Baking soda is a common odor fighter in natural deodorants, but some people find it irritating.
- Fragrance is another common culprit: a large patch-test study found deodorants were the leading cause of fragrance allergy.
- If your skin reacts easily, start with a baking-soda-free, unscented formula.
- Patch test new deodorants on your inner arm first.
- See a dermatologist if a rash doesn't clear after you stop the product.
Why some natural deodorants irritate
Baking soda
Baking soda (sodium bicarbonate) is popular in natural deodorants because it absorbs odor. Underarm skin is thin and often rubbed by clothing, and some people find baking soda formulas leave it red, itchy or stinging. Not everyone reacts, but if you have, switching to a formula made without it is the simplest next step.
Fragrance and essential oils
Scent can be a problem whether it comes from synthetic fragrance or essential oils. In a study of more than 17,000 patients patch tested in Denmark, about 10% had a fragrance allergy, and deodorants were the single biggest identified cause, at 25% of cosmetic-related cases (Heisterberg et al., Contact Dermatitis, 2011). If you've reacted to scented products before, unscented is the safer place to start.
Baking-soda-free and unscented deodorants we stock
| Deodorant | Baking soda | Scent | Format | What the brand highlights |
|---|---|---|---|---|
| Natural Embrace Unscented Roll-On | Not listed | Fragrance-free | Roll-on | Organic aloe, prebiotics, dermatologist tested |
| Naturallow Natural Deodorant | Free of baking soda, per the brand | See listing | Stick | Magnesium hydroxide and probiotics |
| Blu Atlas 48-Hour Natural Deodorant | No baking soda, per the brand | See listing | Gel | Volcanic ash and arrowroot; 14 ingredients |
| UpCircle Deodorant Refills | Baking-soda-free, per the brand | Bergamot and lime | Refill stick | Macadamia oil; refillable |
| Balmy Tallow Citrus Vanilla | Not listed among key ingredients | Citrus and vanilla essential oils | Balm | Grass-fed tallow, magnesium hydroxide, arrowroot (not vegan) |
Ingredient lists can change, so check the full list on each product page before you buy. Browse all options in our natural deodorant collection.
How to patch test a new deodorant
The American Academy of Dermatology (AAD) recommends testing a new skin care product before using it widely:
- Apply a small amount to the same spot, such as the inside of your elbow or the underside of your arm, twice a day.
- Keep going for 7 to 10 days.
- If you see no redness, itching or swelling, you can use the product.
- If you react, wash it off gently and stop using it.
Tips for a smoother switch
- Apply to clean, completely dry skin.
- Wait a few minutes after shaving before you apply deodorant.
- Use a small amount; more product doesn't mean more protection.
- Expect a couple of weeks of adjustment if you're coming off antiperspirant. Our guide to switching to natural deodorant covers what to expect.
When to see a dermatologist
If a rash doesn't clear within a week or two of stopping a deodorant, or if it blisters, cracks or spreads, see a board-certified dermatologist. They can patch test you to find exactly which ingredient you react to.
See all our picks for the best natural deodorant.
FAQ
Why does natural deodorant give me a rash?
The most common reasons are baking soda and fragrance, including essential oils. Some people find baking soda irritating, and deodorants are a leading cause of fragrance allergy. Try a baking-soda-free, unscented formula, and patch test it first.
What is the best natural deodorant for sensitive skin?
Start with one that is both baking-soda-free and unscented, such as the Natural Embrace Unscented roll-on, then try others if you need stronger odor control. Everyone's skin is different, so patch test before switching fully.
Is baking soda bad in deodorant?
Not for everyone. It's an effective odor absorber and many people use it without problems. If it irritates your underarms, choose a formula made without it.
How long should I patch test a deodorant?
The AAD suggests applying a product to a test spot twice a day for 7 to 10 days and using it only if there's no redness, itching or swelling.
Can I use natural deodorant right after shaving?
Freshly shaved skin is more easily irritated, so waiting a few minutes, or shaving at night and applying deodorant in the morning, can help.
Sources
- Heisterberg MV et al. Deodorants are the leading cause of allergic contact dermatitis to fragrance ingredients. Contact Dermatitis, 2011
- American Academy of Dermatology: How to test skin care products
This guide is general information, not medical advice.
This guide is general information, not medical advice. Patch-test new products and ask a dermatologist or doctor about skin or health concerns.