Hi, thanks for your review.
Regarding the "absorption of calcium and sodium", there is information that says that this is correct and there is also other information that rejects it. However you're right, I didn't find a solid source to validate this information, so the best thing I can do is eliminate that point from the article so that readers don't get confused.
I will also take into account your advice to cite the references in-text.

Thanks again for your review.