Great serum
Great serum for dark spot and pore tightening as it has niacinamide.

Perfect
I’ve been using the niacinamide of TO and now im switching to Tiam which i heard lots not only good reviews but loooots of amazing reviews. One of my friends is using this serum and shes the one whi suggested this to me and im glad i did try. Been loving it since i used it.

Great serum
I bought many of them, as this serum has niacinamide that could tighen the pore.

Good product
I’m really enjoying this serum, it has pretty high concentration of brightening ingredients, really light weight, absorbing really well and does not leave any residue or tacky feeling on the skin, perfect for layering with other products, doesn’t have any scent

Average
If you consider going for vitamin product, then I suggest this one as the performance is greater than what I used to purchased.