To be honest, NONE! 
But just make sure when it&#39;s you&#39;re first time using it, only use it 1x a week and build it up to 2x then 3x so and so forth until your face get use to it.

AFFORDABLE AND EFFECTIVE! 
Whenever I&#39;m using this product, it makes my face instantly bright and that&#39;s the power of vitamin C in it. I already used this before and I&#39;m not applying it every night for the first few weeks. Gradually, I&#39;m now using it every night and my skin is grateful for it! 🥺👉🏼👈🏼

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