This ampoule from Medipeel contains glutathione, niacinamide and peptides to brighten skin and help with hyperpigmentation.
Further has witch hazel and biotin in it.
The product has a white, slightly viscous texture and you don't need to apply much. Sinks in well but if applied too much may leave a slightly tacky feeling because of the niacinamide.
I am careful with using it too often because of my sensitive skin, so I stick to only in the PM and not every single day. Just in case as it contains a small amount of retinyl palmitate and the fragrance is high up in the ingredient list.
Need to be very consistent to see results.