I just purchased the skin regeneration trial kit along with the skin tightening kit. How would I combine these products, layer them, so I can regenerate my skin, reducing sun damage spots, and tighten the tissue at the same time.

Thank you in advance.

The best way is the use the copper peptides at one time of the day and the hydroxy acids at another time.

Generally we don't layer products but some people mix the CPs and the acids and report good effects.