Active ingredients and the sun

Hi Randy and Perry, Does Retinoic acid, vitamin A, Retinols, Retinoids, Retinol/id esters etc etc.. really make your skin more photosensitive? If so, do they all do so or are there some types that are more likely to than others.. and at certain percentages? Does Tretinoin really make skin more photosensitive.. or simply, more sensitive?.. (when you're 'acclimatising, your skin to it) I know AHA does make skin more photosensitive.. at least when it is on your skin.. does BHA? Do antioxidants actually stimulate collagen production? etc.. or do they simply help fight the free radicals in order for skin to maintain itself as much as possible? I guess they're doing most of their work at night time as you're not in the sun? Kind regards, Cass

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  • I'm sorry I typed it so each question would be down a line but it's turned out to be all in one paragraph :neutral:
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