>I have just started to use a physical exfoliant with hydrolyzed silica as the scrub agents. I plan to wait again 2-3 days before resuming, or should I wait for a full week just to be on the safe side because I don't want to exacerbate the skin condition?
>If I were to use a chemical exfoliant such as a BHA or AHA, are the circumstances the same or different than that of the scrub?
>Say I buy both the 1.5-mm and 0.25-mm dermarollers and decides to use them both in my skin care regimen. I have read a lot of your threads and posts, but I don’t think my specific question was answered for me: So I use my 1.5-mm on a Friday, then how many days should I wait until it is OK for me to use the 0.25-mm for product penetrations?
>Just to confirm, using the 0.25-mm (not immediately after) will or will not interfere with the collagen production caused by the 1.5-mm?
>I have read somewhere that the conversion from Collagen III to Collagen I takes months to complete. I do not understand the benefit and logic of rolling even 5-6 weeks after the first session. You said in one of your post that at least the first stages of collagen production is complete, but pricking the skin with a 1.5-mm again will cause trauma to the same area, again, so wouldn’t it destroy the collagen III “in progress” that have finish just the first few stages?
>I have a fresh tube of tretinoin I rather not waste, how many days after using the 1.5-mm is it OK to apply tretinoin? 2-3 days? One week?
>How about hydroquinone? L-ascorbic acid? I know you said you can apply vitamin C before, but you never give an exact number of days before you can resume acids such as these.
>If I can tolerate the acids with mild to no redness, then it is still OK to use Tretinoin and vitamin C after rolling? Yes, I am also referring to IMMEDIATELY afterwards. And on top of that, some cheap Vaseline in a tube as my occlusive for the holes in the skin.
>How long should I be avoiding anti-inflammatory ingredients after using 1.5-mm?2-3 days? One week? I will be using 0.25-mm to give better penetrations to ingredients like these and acids, hydroquinone, and niacinamides.
>Last question here (for now): in your instruction manual, you give advice on Vitamin C serum, I still have questions: If I don’t have a 100ml bottle, is there is formula you can give me to make the percentage of vitamin C I want to the size of bottle I have? Say I have a clean 270ml toner bottle from an old product I cleaned with alcohol and washed with hot water, how many teaspoon of vitamin C powder should I add to make 10% vitamin C? 20%? You weren’t clear about percentage in your manual.
>I have clogged pores, will I make my pores and the clogged ones in a worse state if I rolled on that area?