I read the reviews of the Ordinary’s Niacinamide 10% + Zinc 1% and most people recommended was to use 1-3 droplets applied to a clean face. I tried this method and it work beautifully! I apply 2 droplets to my neck and face rapidly because of evaporates quickly.
https://www.amazon.com/Ordinary-Niacinamide-10-Zinc-30ml/dp/B01MDTVZTZ

