Should I take my shoes off inside the house?
Keep them on, if you can stomach knowing what they carry on their soles.
Tests have shown that shoes carry a host of faecal bacteria – including E. coli – which could come from the floors in public toilets as well as from dog poo.
One study carried out at the University of Arizona, US, suggested that over 90 per cent of the bacteria from your shoes then transfer to the floors in your home. Shoes can also traipse in carcinogenic chemicals picked up from roadside dust, along with problematic pesticides from lawns.
Of course, some dirt is good for you, but you can always go into the garden to be exposed to germs.
- Why do sweaty feet smell of cheese?
- Is there really poo everywhere?
- How do I know if my toe is broken or just bruised?
- Do I really need to wash veg if I’m going to be cooking it?
Asked by: Stephanie Lee, Bristol
To submit your questions email us at firstname.lastname@example.org (don't forget to include your name and location)
Dr Emma Davies is a science writer and editor with a PhD in food chemistry from the University of Leeds. She writes about all aspects of chemistry, from food and the environment to toxicology and regulatory science.