Fact, checked
You Are Made of 9,000 Pencils
Carbon makes up about eighteen percent of your body. After water, it's the main ingredient.
How much of you is just... pencil? It sounds strange, but every part of you is built from carbon. And there's a lot of it.
The Carbon Within
In fact, there is enough pure carbon in your body to make about nine thousand standard pencils. Imagine a mountain of them. All from you.
Carbon makes up about eighteen percent of your body. That makes you one of the most carbon-rich things on the planet. After water, it's the main ingredient. It's the backbone for the molecules that build you.
So the next time you pick up a pencil, remember what you have in common. You're both mostly carbon. Just organized a little differently. What else are we made of?
Every claim, checked
This is the whole list, including the ones we could not confirm. Verified means a checker confirmed it and named a source that exists. Wrong means both checkers said so. The rest failed in three different ways, and we say which. Not established: we checked and nobody could pin it down. No source: a checker backed it, but the citation did not hold up. Second check disagreed: the first reading confirmed it and the second one would not. Each line also says how the verdict was reached: searched means we went to the web to confirm the source exists, not searched means the verdict rests on what the checkers already know. The rest is in how we check things.
there is enough pure carbon in your body to make about nine thousand standard pencilsNot establishedsearchedCarl Sagan, Cosmos (1980); Wired Science fact-checking
Carbon makes up about eighteen percent of your bodyVerifiedsearchedBiology textbooks; American Chemical Society
After water, it's the main ingredientVerifiedsearchedBritannica, "Human body – Chemical composition" (encyclopaedia entry)
every part of you is built from carbonVerifiedsearchedBiochemistry textbooks
That makes you one of the most carbon-rich things on the planet.Not establishednot searchedHumans are relatively carbon-rich compared with many inorganic materials, but comparing "one of the most carbon-rich things on the planet" is vague (what set is being compared?). Many organic materials (wood, coal, living plants, animals) have higher carbon fractions; soils and minerals have lower. Without a stated comparison class, the claim cannot be verified.
It's the backbone for the molecules that build you.VerifiedsearchedLehninger Principles of Biochemistry (textbook)
Imagine a mountain of them. All from you.Not establishednot searchedThis is a figurative amplification of the pencil-count claim. Because the exact pencil-count is unverified and the phrase "mountain" is qualitative, the statement cannot be checked as a factual numeric claim.
You're both mostly carbon.Not establishednot searchedWhether a pencil and a human are both "mostly carbon" depends on the definition of a modern "standard pencil" (wood, graphite core, lacquer). A pencil's graphite core is mostly carbon, but the pencil as a whole contains a lot of wood (cellulose, also carbon-based) and other materials; a human body is ~18% carbon by mass. The general statement is imprecise and not directly verifiable without specifying what fraction defines "mostly."
Just organized a little differently.VerifiedsearchedCallister & Rethwisch, Materials Science and Engineering (textbook) and general organic chemistry/biochemistry texts
every part of you is built from carbon. And there's a lot of it.Not establishednot searchedReiterating the earlier sentence: it is wrong to assert every part is built from carbon (see above). The second clause, "there's a lot of it," is supported by the fact carbon is ~18% of body mass, but because the first clause is false, the combined sentence is partly wrong/partly supported. Closest thing found: Britannica, "Human body – Chemical composition" (encyclopaedia entry).
People also ask
What percentage of your body is carbon?
Carbon makes up approximately eighteen percent of the human body. It is a significant portion of your total body mass after water.
Is the human body built from carbon?
Yes, every part of the human body is built from carbon. It serves as the primary structural element for your biological molecules.
What is the main ingredient of the human body?
After water, carbon is the main ingredient in the human body. It is the second most abundant substance in your system.
Why is carbon important for the body?
Carbon is essential because it forms the structural foundation for the molecules that build you. It functions as the backbone for these complex compounds.
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