Science
What Is the Hardest Substance in the Human Body?
A riddle from Fawazeer's Science pack — one of 2,500+ Arabic riddles across 11 themed packs. Guess, then reveal the answer below.
What is the hardest substance in the human body?
People also ask
What is the answer to 'the hardest substance in the human body'?
Tooth enamel. It's the hard, mineral-rich layer covering your teeth and it's even tougher than bone.
Is tooth enamel really harder than bone?
Yes. Enamel is about 96% mineral, making it the hardest tissue your body produces, much denser than bone.
Can tooth enamel grow back if it's damaged?
No. Unlike bone, enamel has no living cells, so once it wears away it can't regenerate, which is why protecting it matters.