hello
I would like to ask for information about Pure-EGCG ™ ( Green Tea Extract , 98% EGCG ). I put Pure-EGCG ™ into a clear gel and found that the gel has turned a dark brown. I am not sure if it is from this substance or not. Is there a chance that the Pure-EGCG ™ raw material will change color or become darker over time or if it is exposed to light or air for a long time?
thank you