What’s the right order to apply a BHA serum?

Little Rhino asks…I would like to add a B5 Serum into my skincare routine. I use a BHA ( salycic acid 2% ) lotion in the am/pm. I works well with my skin and mild acne. However, I do need a little extra boost of hydration. So the B5 sounded like a great place to […] from The Beauty Brains