Why does dandruff only appear on your head and not, say, your knees or back?
• Dandruff is simply flakes of the outer skin layer that is continually shed as older cells die and are replenished. Look in any enclosed space visited by people and you will notice how much is suspended in the air.
It is estimated that each of us sheds around 450 million of these cells daily – or up to 0.2 grams. House dust is up to 90 per cent human cells. Not surprising given that we change our skins monthly.
“House dust is up to 90 per cent human cells – not surprising…
