What is the primary excretory route for the water-soluble vitamins?

The primary excretory route for the water soluble vitamins is the kidney and then in to the urine. the vitamin c is water soluble so the only way it can be transported is by facilitated diffusion using a channel protein, channel proteins allows polar. thank you for this question. i hope the answer could help you.

When we say water-soluble vitamins, these are the vitamins that can be absorbed and utilized by the body easily and when excess vitamins are taken, these are easily excreted by the body through the KIDNEYS. Therefore, the primary excretory route for this is the kidneys. 

This is giving me a headache i have asked others and they don’t know it either

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