PABA is well known for its use externally in sunscreen products. Para-aminobenzoic acid (PABA) is a naturally occurring non-protein amino acid. It was previously thought to be a B vitamin. Added Vitamin C supports collagen formation and provides antioxidant support. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 1968, NOW has been making top quality products that are tested to the highest standards to empower people to lead healthier lives. Our promise - what is on the label, is precisely what is in the bottle.