Para-aminobenzoic acid (PABA) is a compound people sometimes take as a supplement. This entry covers standard PABA, which is different from potassium PABA. The substance forms part of the folic acid molecule and occurs in certain foods.
People use PABA to support skin and hair. The evidence backing that use is thin. Researchers have studied higher doses for specific health conditions. These applications have not become widely accepted in mainstream medicine.
Oral doses commonly start at 200 mg per day or higher. The right amount depends on the form and the intended purpose.