Sadoer Dark knuckle niacinamide + vitamin C serum 50ml

Brighten and even out dark knuckles with this potent serum combining niacinamide and vitamin C. The 50ml formula works to reduce hyperpigmentation, strengthen skin barrier, and boost radiance where you need it most. Niacinamide minimizes pore appearance and soothes irritation, while vitamin C delivers antioxidant protection and promotes a luminous complexion. Perfect for targeting stubborn discoloration on hands, elbows, and other sensitive areas. Apply daily for visible results and smoother, more unified skin tone.