NAD+ (nicotinamide adenine dinucleotide) has become a buzzword in the world of anti-aging and skin rejuvenation. Marketed as a cellular repair booster, NAD+ shots are often promoted as a way to achieve glowing, youthful skin from the inside out. But while the concept sounds promising, the reality for skin health is far less clear; and in some cases, potentially disappointing.

Counterfeit beauty products are illegal imitations designed to deceive. While they may look identical to your favorite high-end serum, what’s inside the bottle can be dangerous—and even permanently damaging—to your skin.