great niacinmide
non-irritation and moisturising. does not cost the earth too!

Very good serum.
One bottle last few months. brightening my skin. No irritation. I like it.

great
A lightweight, water-like serum that absorbs into the skin very fast. Dries down to a matte finish. I am using it daily, 3-4 drops are enough for the face and neck. This product is giving me very noticeable results even out the skin’s texture. My face becomes less oily during the day. Reduces inflammation of acne significantly and makes them heal quicker. This serum is improving my dark spots and hyperpigmentation. Layers well with other skincare products. This product hasn't given me any irritation, redness, or breakouts. Don't forget to apply for SPF protection in the morning. The packaging has a new design now.

Good Good
I love love love love

Vita B3 Source
It was a watery consistency which makes it fast absorbing and nonsticky. This was a plus because you can easily layer it together with your other products. As for the scent, it’s fragrance-free.