very good, mild, and gentle on the skin and improve skin barrier and hydrating. I'm so glad I'm capable of thinking critically and didn't listen to that fear-mongering skeleton with a medical degree on YouTube, AKA the Dr Dray that doesn't enjoy the chronic. This technology has been used for years and I haven't seen a damn thing about a silica granuloma. This stuff was probably made with holy. water, I will forever repurchase. Your skin will look and feel like silk and it really does hasten absorption of all following products. F around and find out, you'll be glad you did! Doesn’t cause any irritation, works well with my other products and a noticeable difference the next morning.This one specifically can be used everyday and let me tell you my skin has changed so much since I use to have very bad dark spots and when I started this serum and used my regular skincare I saw a big difference including with my skin texture ! I have Large pores and I tried this for the first time