Golden Pits: Why White Shirts Turn Yellow, Plus How To Remove Pit Stains
Let us face it, most of us have been there. You pull out your favourite white shirt, and there it is, a yellow stain under the arm. It is frustrating, and it often sends a great shirt to the bin. Here is what causes those yellow armpit stains, and how to help prevent them.
The Cause, Aluminium and Sweat
One of the main culprits is the interaction between aluminium salts in traditional antiperspirants and components of sweat. Many antiperspirants use aluminium salts to reduce perspiration by temporarily blocking sweat ducts, and these ingredients can contribute to yellow staining on fabric.
We have two main types of sweat glands. Eccrine glands are found all over the body. They produce a mostly water based sweat that evaporates quickly and usually does not cause odour. Apocrine glands, concentrated in areas such as the underarms and groin, produce a thicker secretion containing proteins and lipids.
When sweat components, body oils and product residue build up on fabric, particularly alongside aluminium based antiperspirants, yellow discolouration can develop, especially on white cotton.
The Solution, Switch to Aluminium-Free Deodorant
To help prevent yellow underarm stains, choose an aluminium-free deodorant. Natural deodorants such as Frank + Bare do not rely on aluminium salts to block perspiration.
Instead, Frank + Bare takes a skin-first approach. Our AHA-powered formula helps support a mildly acidic environment that makes it harder for odour causing bacteria to thrive, helping control odour while allowing your body to perspire naturally.
No aluminium. No baking soda. Just effective odour control with skincare built in.
Discover Frank + Bare deodorant →
How To Remove Golden Pit Stains
If stains have already set in, try this simple method at home.
DIY Pit Stain Remover
- Mix ½ cup hydrogen peroxide with 5 teaspoons bi carb soda into a paste,
- Massage the paste into the stained underarm area until fully covered,
- Leave to sit for 30 minutes,
- Launder as usual, and air dry to check progress before using heat.
The combination can help break down residue and lift discolouration. Repeat if needed for older, set in stains.
Share Your Tips
Have another way to rescue white shirts from golden pits? Share your method in the comments, and help others save their favourites.
Frequently Asked Questions
What causes yellow armpit stains on white shirts?
Yellow stains can develop when aluminium salts from antiperspirants interact with sweat components, body oils and product build-up on fabric. The discolouration is particularly noticeable on white cotton.
Can switching to an aluminium-free deodorant help prevent yellow stains?
Yes, removing aluminium salts from your underarm routine can help reduce the aluminium and sweat interaction associated with yellow staining. Other factors, including body oils, product build-up and laundering, can also contribute to discolouration.
How do I remove existing yellow pit stains?
Make a paste with ½ cup hydrogen peroxide and 5 teaspoons bi carb soda, apply it to the stained area for around 30 minutes, then wash as usual. Air dry first so you can assess the result before exposing the fabric to heat.
Does sweat alone cause yellow stains?
Sweat itself is usually colourless, but yellow staining can develop when sweat components combine with product residue, body oils and aluminium based antiperspirants over time.
Will this method work on coloured fabrics?
Hydrogen peroxide can lighten colours, so always patch test on a hidden area first. For delicate or valuable garments, consult a professional cleaner.
