Heliocare Advanced Niacin B3 Supplement – 120 Vegan Capsules – 240mg Fernblock® PLE is a dietary supplement combining 500mg of non-flushing Vitamin B3 (nicotinamide) with 240mg of Fernblock® Polypodium leucotomos extract (PLE) per 2-capsule serving. It is designed to provide antioxidant support and help maintain the skin’s natural defenses against environmental and UV-related oxidative stress.