Several years ago skinbiology used to offer trireduction with or without retinol but now I only see it with retinol. May I ask why you stopped selling the other formula? I have a bottle of each here that were put away and I recently decided to use them up. It seemed that I noticed more skin turnover without the retinol. I got very dry and skin was definitely sluffing off but when I switched to the one with retinol I don't see anything happening at all. Any insight skinbio?

The problem is too many products.

The retinol free Trireduction was for people having difficulties with retinol, such as breakouts. So our idea was that people could use either CP Serum or Super CP serum which have no retinol if they have troubles with retinol.

Our clients with dry skin and over about 45 preferred the copper peptides with retinol while those who were younger preferred the retinol free product.

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