PABA, or para-aminobenzoic acid, is a nonprotein amino acid, sometimes included in the B Vitamin family. PABA has been linked to red blood cell formation as well as the production of folic acid. PABA is also influential in the break down and usage of many proteins. PABA is essential for health and well-being - contributing to healthy hair and skin, among other functions. PABA is most widely recognized for inclusion in sunscreen due to the protection PABA provides against UV rays. However, supplement PABA is different. PABA can be found naturally formed in the intestines from bacteria and also in grains and animal products.