I bought this in order to find a natural lightening product for a serious smattering of "post-inflammatory hyper pigmentation"left after two years of constant adult acne that I received from Mother Nature as a 30th birthday present. Lucky me. Two years later, the aftermath meant I could not leave the house without foundation and a thick concealer, and the hyper pigmentation STILL had a purple cast on my face. I started using this on March 3rd, and by April 15th, my husband noticed a significant lightening of the discoloration, so much so a CC cream (Peter Thomas Roth camu camu) and a light dusting of powder to set was more than enough to conceal. I have two thirds of the bottle left so it will last me at least 8 more weeks. It's no more expensive than other serums that promise results and do nothing. As a prep to the serum I would double cleanse and use an acid pad ( PTR unwrinkle) and would press the serum into the skin. I did not like the smell, but is dissipates quickly and who cares, really if it does what it says on the tin? I apply a high SPF whenever I go out and avoid going out during peak hours. As I work from home, I would use this in the morning and my Differin at night. I don't know how it would respond to layering products, like make up, as others have said, it does have a sticky residue. But, despite the smell and the tacky feeling, it is packed full of outstanding research-based high quality ingredients and will provide results, if used consistently, and with SPF. I will repurchase.

I was looking for a Vitamin C serum and saw this also contains niacinamide - brilliant for evening out skintone. Being Oskia, it also contains the signature MSM. I already take the Oskia MSM supplements, which are like a miracle supplement for me. I like this serum very much. I wanted to take a break from my strong retinoids over the spring/summer, so am happy I have this as a replacement.

He estado usando el serum durante aproximadamente 4 semanas. Desde la primera semana noto la piel mucho más luminosa, más jugosa, si bien no he notado cambios en cuanto a la pigmentación de algunas zonas. El olor es muy agradable, y la textura muy suave, por lo que la aplicación resulta un placer. Justo después de aplicarlo, la piel permanece algo pegajosa, pero transcurridos unos segundos, se absorbe por completo, dejando la piel confortable, aunque normalmente aplico una crema hidratante posteriormente. El único punto negativo es el precio, que me parece algo elevado... ***I've been using the serum for about 4 weeks. From the first week I noticed my skin was much more luminous, although I have not noticed changes in terms of pigmentation. The smell is very nice, and very soft texture, so the application is a pleasure. Just after applying, the skin remains somewhat sticky, but after few seconds it is completely absorbed, leaving the skin comfortable. I do however normally apply a moisturiser afterwards. The only negative point is the price, which seems a little high.***

I've been using this serum for about 3 weeks now, but after only 2 days, I fell in love with it. My skin looks less dull than before, and it gives me a healthy glow. I use this after my toner, and it absorbs right away. It only takes a small amount, so I expect the bottle to last awhile. (2 drops covers my face - if I use any more it feels tacky). I was looking for a vitamin C serum and decided to order this one because it also has the benefits of MSM and the antioxidant glutathione. I'm very pleased with the results.

I really wanted to like this. I can't speak to the brightening properties as I have only used this a handful of times. What has kept me from testing this out further is the texture. Everything I apply over this rolls on my skin. Sadly I had to wash it off a couple of times as well. If it wasn't such a bother to use, I might have stuck with it longer. It's a shame really, I was quite keen to try this. I might give this a shot again in a while. We shall see.