The human body contains enough fat to make approximately seven bars of soap.
Why it is true
The average body fat of an adult is about fourteen kilograms, and the fatty acids present in that fat can be saponified to create soap, although this is not the most hygienic or practical use.
Source: Chemistry
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.