Review submitted. I have been using this serum twice daily for almost 2 weeks. I use it twice a day in combination with my vitamin C serum and spf as this is the recommended way to use it to get the best benefits. I have oily combination skin and have found that this P-Tiox serum does not add extra oily on my skin. It's very lightweight, and absorbs very easily into my skin. I squeeze around 1 to 2 pippets into my palms and dab then massage it lightly into my face, being careful around my eye area. Since using this serum I have noticed the fine lines on my forehead, under my eyes and just under my cheeks where I smile are starting to look less pronounced and smoother. This serum contains Peptides, niacinamide, 5%PHA (polyhydroxy acid) which is similar to AHA but less sensitising. This exfoliates the skin and helps to protect the skin's barrier. This serum also contains laminaria which is formulated to improve the skin's texture and radiance, whilst also helping to reduce visible signs of ageing. Overall I am very pleased with the results to date. My skin is looking smoother, glowing and more radiant. I'll definitely be keeping this is my skincare routine. I've not experienced any bad side effects from using this serum.