The pathogenic microorganisms, their toxic exudates, and other contaminants together, cause serious conditions such as cholera, diarrhea, typhoid, amebiasis, hepatitis, gastroenteritis, giardiasis, campylobacteriosis, scabies, and worm infections, to name a few.

Vitamin A, also known as retinol, is a fat-soluble vitamin traditionally associated with vision and eye health. The most abundant dietary sources of vitamin A are liver, fish liver oil and butter.