Review title is No difference after three weeks of consistent use, and product won't dispense through pump. [SEP] ANOTHER UPDATE:<br /><br />My dermatologist told me that unless a Vitamin C serum contained the L-ascorbic acid form of Vitamin C, I was wasting my money and doing little to improve my skin.  I found a serum here on Amazon that contains 17% L-ascorbic acid, and I've been using it for approx. 3 weeks.  What a difference!  I can definitely feel it working for one thing (it burns for about 5 seconds), but more importantly, I can SEE the difference in my skin already.  At first I thought my eyesight was going downhill, but then I realized my skin really did look smoother and had a new glow.  Do an Amazon search for L-ascorbic Vitamin C serum to get the good stuff.<br /><br />Having said all this, I have added a LOT more spinach to my daily regimen lately, so I'm sure that's contributing to my skin's appearance too.<br /><br />UPDATE:<br /><br />I finished the bottle which gave me about 5 weeks of use.  If it made any difference in my skin, it's at a microscopic level.  I'm buying another bottle - mainly because there's got to be SOME truth to all the 5-star reviews.  But if, after another month or so of use, I still don't see improvement in my skin, I'm asking a dermatologist for a Rx for Retin-A.<br /><br />ORIGINAL REVIEW:<br /><br />I've been using this product for three weeks, and I have yet to see any improvement in my skin.  I'm amazed (and not a little skeptical) about some people seeing results in two weeks.  I also wonder how many 5-star reviews were written by people who were given the product to try.<br /><br />I'm very methodical about using new products on my skin.  I use a 10x magnifying mirror, establish a &#34;baseline&#34; area of my skin to observe over time, and take close-up &#34;selfies&#34; of my skin to compare with photos taken a few weeks later.  No difference so far, but I'll continue to use this product until it's gone.<br /><br />I DO like that this retinol doesn't irritate my skin, which is highly unusual.  So unusual, it makes me wonder if it indeed contains any retinol.<br /><br />In conclusion, and not a critique of the product itself, but the product won't dispense through the pump.  It's too thick.  I'm having to pull the cap off and shake the serum on to my fingertips. I wish it came with a dropper instead.  I changed out out the pump with a dropper from another bottle of serum.  I'm surprised I haven't read about this problem in other reviews. Another reason I'm leery of all the glowing comments.<br /><br />I'll update with my progress, or lack thereof, at a later date.