Review title is Sticky and non-absorbent [SEP] Application of vitamin C serum to my face twice a day is a routine I carry out without fail. I have tried numerous brands of vitamin C sera (usually combined with Hyaluronic Acid for hydration effects). When this 20% vitamin C serum from Premium Nature was offered as a Lightning Deal, I jumped at a chance to test out yet another brand.<br /><br />An immediate problem I encountered was a shattered glass dropper upon receipt of the item (please see photos), resulting in a potentially dangerous situation. Not to be fazed, I poured the serum into another clean amber glass bottle and commenced using the product.<br /><br />No other vitamin C serum I have tried has been as sticky and gooey as this product. No matter how much or how little of this serum I apply, it remains glistening on the surface of my skin for hours. When I apply sunscreen on top of this serum, the sunscreen too appears not to be absorbed, which I find disturbing.<br /><br />As a child, I used to read cereal boxes to entertain myself during breakfast. Nowadays, my reading material gravitates toward ingredient lists. As a biochemist, a published complete list of ingredients in any biochemical product fascinates me. I wish this serum’s ingredient list were more informative. To that end, I wish the first listed ingredient were not a vague “Organic Herbal infusion”.<br /><br />There are four features I do like about this serum:<br />1) 100% Natural, Cruelty Free, GMO-Free & Paraben Free<br />2) Made and bottled in the USA<br />3) Affordable price<br />4) The clarity of the serum suggests that it has not oxidized into an ineffective product.<br /><br />Despite an intense dislike for the texture of the serum and its non-absorbent characteristics, I religiously applied this product twice a day for the past 3 months. Unfortunately, I have not observed a decrease in the number or depth of the lines on my skin in that time frame.