What approximate percentage of the human body's total mass is genuinely primordial, originating directly from the Big Bang?

Answer

About 3%

Since most mass is water (H2O), and hydrogen makes up only about one-third of that water mass, only about 3% of total body mass is genuinely primordial, while the vast majority is stellar product.

What approximate percentage of the human body's total mass is genuinely primordial, originating directly from the Big Bang?

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