The human body contains enough fat to make 7 bars of soap.
Why it is true
In addition to fat, the human body also contains enough iron to make a 3-inch nail. This fact highlights the raw chemical composition of the human body.
Source: Biology
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.