◐Use at different times (AM / PM)
Why
In published literature these work best at different pH ranges and stacking is commonly avoided due to combined irritation potential.
How to use them
Vitamin C in the AM under sunscreen; retinol in the PM.
🇮🇳 For Indian skin & climate
Vitamin C in the morning pairs well with sunscreen, important given high UV and pigmentation risk in India.
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