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Q: What is the most abundant and least expensive source of calories in the human body?
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neuronal tubulin


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Mind is the second most abundant substance in the human body


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Oxygen is most abundant element .


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What nutrients are most important to the human metabolism?

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The most abundant element in any organic structure, including the human is hydrogen.


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Carbon is the most abundant element in the human body. Hydrogen, nitrogen, oxygen, phosphorus and sulfur are next in abundance.


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Why does oxygen have a cheap price and diamond expensive?

At a first glance, this seems really weird since:oxygen is essential for human survivaldiamond is not essential for human survival...and therefore, oxygen should be expensive whereas diamond not.However, looking at the scarcity we realize that there are a lot more oxygen than there are diamonds.Therefore, since oxygen is abundant (while not infinite), it is cheap (unit price). and since diamond is extremely scarce, it is expensive.