Grooming and coat
Can I use human shampoo on my dog?
Last updated 23 September 2026 · How we write and check this
Short answer
It is best avoided as a regular habit. Human shampoo is formulated for a more acidic skin pH than dogs have, and repeated use can dry out and irritate a dog's skin. A single accidental use in an emergency, such as no dog shampoo being available, is unlikely to cause lasting harm.
The core issue is pH mismatch
A dog's skin sits closer to neutral, often in the range of 6.2 to 7.4, compared to the more acidic pH around 5.5 typical of human skin. Human shampoo is formulated for that lower pH, and using it on a dog can strip the natural oils and disrupt the skin's protective barrier faster than a dog formulated shampoo would.
What repeated use can lead to
One bath with human shampoo is unlikely to cause a problem, but using it regularly over weeks or months can leave a dog's skin dry, flaky, and more prone to irritation or itching. Dogs with already sensitive skin are more likely to react noticeably to the mismatch.
What to do instead
Keeping a basic dog shampoo on hand avoids the issue entirely, and in a genuine pinch, a small amount of baby shampoo, which is milder and closer in pH to some dog formulas, is a better emergency substitute than an adult human shampoo, though it still is not a long term solution.
Key takeaways
- Human shampoo is formulated for a more acidic skin pH than dogs have.
- Occasional accidental use is unlikely to cause harm, but repeated use can dry and irritate the skin.
- Baby shampoo is a milder emergency substitute if no dog shampoo is available.