B11 vitamins, also known as PABA (para-aminobenzoic acid), are part of the B-complex vitamins group. They play a role in the synthesis of folic acid and are involved in the metabolism of proteins and carbohydrates. While not classified as an essential vitamin for humans, they are found in various foods, including grains, eggs, and dairy products. Although B11 vitamins are not widely recognized, they may contribute to skin health and hair pigmentation. Some people take PABA supplements for potential benefits, but scientific evidence supporting these claims is limited. Always consult a healthcare professional before starting any new supplement.