[Routine help] When should I use my vitamin c serum so it will be the most effective?

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Hello everyone! Long time lurker here.First off, this subreddit has helped me TREMENDOUSLY already. Now I'm just working on PIE and light scarring, with small problem areas. I've read that using vitamin c with certain things can irritate your skin (mixing pHs, yada yada stuff I unfortunately don't understand yet.)Current routine:AM: CeraVe foaming, Witch hazel, CeraVe AM or PM (depending on how much sun I expect to get, because I prefer PM)PM: CeraVe foaming, Stridex redbox, Paula's choice 8% AHA, CeraVe PM, Slug mask of vaseline(Also, I'm still experiencing an overall kind of redness. Any tips?My only remaining problem areas are the side of my chin which I assume to be hormonal. I've read spearmint capsules may help blocking androgens?)Thank you for reading! Any help is welcome.And THANK YOU SCA!Edit: sorry for the formatting. Currently mobile.
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Submitted by babesuruncle