The Ordinary - Hi :-) CAIS is NIOD's Copper Amino Isolate Serum. It contains GHK peptides bound to copper which is known as copper peptides (GHK-Cu) that are found in our plasma
UPDATED: Review: NIOD Copper Amino Isolate Serum 2:1 (CAIS2) and CAIS3 – Fifty Shades of Snail
Product question] My Deciem Niod copper serum (CAIS 2:1) turned dark gray, is it safe to continue using it? (I still have the full bottle of it 😱😭) : r/SkincareAddiction