Yellow sweat stains gradually build up from wash to wash. These stains are based on a complex interaction between:
- Your skin lipids
- Sebum
- Sweat
- Active anti-perspirant ingredients
- Laundry detergent
- Water
This chemical reaction produces yellow-coloured deposits that remain stuck in the fibres of your clothes. Several factors are involved, including:
- Frequency of application and changing clothes
- Amount of anti-perspirant used
- Your unique sweat composition
- Minerals or trace elements in your tap water
- Fabric composition
It’s important to note that yellow sweat stains may also occur without any anti-perspirant ingredients. Skin lipids and dirt particles in the air can alone cause persistent yellow stains.