Learn more The Ordinary is an evolving collection of ... retinol can cause extreme dryness and irritation. If you use vitamin C products, make sure to use them in the AM and the niacinamide ...
My experience using The Ordinary Niacinamide 10% + Zinc 1% ... the skin on your hands and going to waste. Those who use vitamin C products should avoid using this serum as niacinamide negatively ...