niacinamide

If you use the serum on your entire face and the spot treatment only locally, I would not worry about it. I would not recommend using both on your entire face. Just use one and skip the other, or use them on alternate days. If you really need to use both of them on your entire face I would do a patch test first since you have sensitive skin. I hope this helps 😊

Many brands now make products with super high concentration because as consumers we have come to know ingredients and tend to believe that higher concentration means efficiency. The thing is that our skin is capable of absorption for certain ingredients up so some amount and then: a) the extra amount is not absorb ed and your skin makes no difference between say a 20% and 30% while you bank account certainly does b) the higher concentration leads to higher likelihood of irritation So it's essential to test before applying all over your face and to consider using different products or same but not the dame day -whatever works best for you :-)

It shouldn't be a problem! But if you have sensitive skin, you can try a patch test first 🌟

You have sensitive skin, i think be better to patch test

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