Yes, most of it is either not absorbed or it is excreted through the kidneys in less than 6 hours. Because of this, bladder cancer has the most dramatic improvement on mega-doses of C. C doses should be spread out over each day so that it stays in the body.
The most important function of C is to make strong collagen to hold the body together. That is why animals have an average of 100 times more C in their system than humans. Humans are extremely unusual in that they don't make their own C in massive doses. The strength of collagen increases with increasing C, provided there is enough lysine and other amino acids. The fascia needs strong collagen.
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