I appreciate a safety seal on a product so you know it is sanitary. This is a tiny bottle but packs a punch. I am unfortunately at a time where my skin does not have any acne problems so I am not really sure how useful this is. I have super sensitive skin and it stings a little to use this but no redress or stinging after I wash it off. I think I just have to get used to the active product. Will try again when I have a breakout.