I have been using all sorts of olay products . My Morning routine is

Skinceuticals CE ferulic
Olay definity foaming moisturizer with with spf 15

In the evening
Olay definity foaming moisturizer


At night
Skinceuticals CE Ferulic
Olay Regenersit Microsculpting cream

So my question is can you have too much Nicinamide ? and in that case will it be ineffective? And finally is it better to use different products that contains different ingredients.

I am thinking about changing my routine and adding Eucerin in the evening ( it has coQ10) and Aveeno Positively Radiant at night.

Nadia