Dear Dr. Pickart
I recently introduced Tretinoin (the lower dosage) into my skin routine. I am using it at night before GHK. Now I do not know how and when to use Lactic Power.Can I use it before/after tretinoin? If yes, How long should I wait before applying it?

Thanks a lo!

Use the Tretinoin immediately after the copper peptides. They work well together.

Then use the Lactic Power 10 later.

Thanks Dr. PIckart. Just a last question, later means after 30 minutes?

Yes, at least 30 minutes. You want the other products to have time to get into the skin.

I would use it in the morning, myself. Too much going on in the evening using that combo IMO

Thanks for your comments/suggestions.

I will try both ways and see what works better for my skin