What is p-aminobenzoic acid or PABA?

p-Aminobenzoic acid is comprised of a benzene ring substituted with an amino group and a carboxyl group. This substance are not actually essential vitamin but may be considered ‘conditional’ B vitamin. Humans under special circumstances require it.

p-aminobenzoic acid is found in significant amounts in liver, kidney, spinach, whole grains ,mushrooms, yeasts, eggs and molasses. It is an essential growth factor for many species of bacteria, which use it for the biosynthesis of folate.

p-aminobenzoic acid

p-aminobenzoic acid always functions as a part of folate molecule in the human system.  It is synthesized by intestinal bacteria.  In bacteria, enzymes are available that can synthesize folate from pteridine, p-aminobenzoic acid glutamate.

High doses of p-aminobenzoic acid may cause nausea, vomiting and possibly liver damage. p-aminobenzoic acid is used as a sunscreen to protect against ultraviolet rays. It has also been used to turn gray hair back to it natural color.
What is p-aminobenzoic acid or PABA?