Vitamin A deficiency can cause growth retardation, xerophthalmia, poor night vision, hyperkeratosis, impaired immune function, organ failure, decreased sex drive, delayed puberty, and kidney stones.

“most notably things like growth retardation xerophthalmia which is keratinization of the eyes especially the cornea and the sclera poor night vision hyperkeratosis which can result as bumps in the skin poor immune function and eventually leading to sometimes massive organ failure decreased sex drive delayed puberty kidney stones”