How long does a serum last?
1805191
I apply the serum twice a day morning and night. In the morning application I do notice a sight low sheen (indicating the products is active and working) however clinically speaking I don not know the longevity of the active ingredients. I recently have completed a syringes worth of the serum and I really do not notice a difference with my eye bags "they look the same". The serum does apply nice and smooth, light in texture, no smells/odors and I do feel that it gave nourishment to the delicate under eye skin and protection. I will not repurchase due to the high price and no difference with my eye bags. I apply the serum twice a day morning and night. In the morning application I do notice a sight low sheen (indicating the products is active and working) however clinically speaking I don not know the longevity of the active ingredients. I recently have completed a syringes worth of the serum and I really do not notice a difference with my eye bags "they look the same". The serum does apply nice and smooth, light in texture, no smells/odors and I do feel that it gave nourishment to the delicate under eye skin and protection. I will not repurchase due to the high price and no... » Read More I apply the serum twice a day morning and night. In the morning application I do notice a sight low sheen (indicating the products is active and working) however clinically speaking I don not know the longevity of the active ingredients. I recently have completed a syringes worth of the serum and I really do not notice a difference with my eye bags "they look the same". The serum does apply nice and smooth, light in texture, no smells/odors and I do feel that it gave nourishment to the delicate under eye skin and protection. I will not repurchase due to the high price and no difference with my eye bags. « Show Less
1805192
Started using serum end of Nov 2012 (twice a day, everyday) and just finished Feb 2013. 2.5 months!
1805193
You need actually very little. Just drop is enough for both eyes. Otherwise your drowning your eyes in the stuff. I would say that you could get at least 6 months out of it, perhaps 8. I've used it now for two months and used approx. a quarter of it. And I apply it twice a day.
1805194
Your mileage will vary. Most customers agree it's about 45-60 days. If you find yourself using it faster than that (per tube) you probably are applying too much serum. OR, you could be using it on your whole face, which is fine, but just keep in mind it's designed for the eyes and applying to the entire face will obviously take more serum and in turn, not garner the same times we reference (45-60 days). Richard BanksCTO - SKIN PRO
1805195
I cannot use it. It irritates my eyes and they swell. I have tried everything.
1089790
The cleanser lasts for about 4 mos. The serums and moisture's last longer..6-7 mos or more.
1764087
The serum only comes in the bottle, which has lasted me two months. The facial creams come in a bottle.
1287904
The information on the label was designed to comply with FDA requirement for such product. Moreover this product typically retains its effectiveness upto two years when stored well. Mostly, they are used up within few weeks to months of production, so as important as expiry date is they may not be an issue with so many vitamin c serums.
1417331
Hi Azi - the serum is for any age range. It proactively prevents visible signs of aging and for those who have signs of aging, helps reduce wrinkles, fine lines and firm skin. We have people of all age groups using the serum. I hope that helps! Lois
1627162
If you use an acid peel, leave your skin time to heal completely before you use this serum. I'd start using it a week after the acid peel, but everyone has different skin, mine heals fast.
2065797
I haven't tried the serum yet, but the filler is a very soft light cream that doesn't cause me to break out. This is my second tube and it lasts about 6 months with constant use. I've used serums of other brands and they tend to be a little like egg white - almost watery.
1409878
I use it on my legs and I'd estimate that it's good for 60 days. Hard to say for sure as I only use it once a week and I've had this bottle for over a year.
406369
the serum is clear when it's fresh and turns orangey when it's old. I keep my C serums in the fridge so it lasts longer. My box didn't have an expiry date, I assume it's 6 months from what I found out on the web. hope this helps you!
2065796
I'm not sure. I only have this one. It does "work" though. I say "work" because it's a temp result. My guess is the serum would be over time as the filler is more of an instant result. This does well under makeup.
475399
On the package somewhere it should have a small thing that looks like a tub with lid and a number like 24 or something that means it's good for 2 years. So all cosmetics and even body care has "expiration" dates just beware using them after the efficiency of the product won't be as good and for cosmetics it means it could be full of germs that you're transferring on to your body.
83744
i think it will last 4-6mos. because i only use about 4 drops for face & neck.
240258
People tend to use too much product. I use serum from 1/2 oz dispensers and one lasts 2 months. My esthetician tells me I am using the correct amount. Thing is, the vit C goes bad in about three months. so that is why I buy mine in smaller quantities.
258667
My Cellex C usually lasts at least 6-8 weeks. I use it generously each morning on my face, neck and decollette area and keep it in ther refrigerator.
1148344
For me the effects last 4 to 6 hours depending on activity factors. Unless you over-apply there shouldn't be any visible residue to flake off.
1558975
If your Serum is an unopened product which has been sealed for the past year, it should still be safe to use. Sealed hair care products can last up to 3 years. However, once they are opened and air, heat or light exposure occurs, the shelf life of the hair product decreases to about 1 1/2 years. It's been said that hair care products are not required to have an expiration date. But more professional hair care lines are adding expiration dates to their own line of products. Try storing your sealed products in cool dark places to prolong the shelf life.
2156884
If you do like the web site states to do and apply 1 coat, then wait 30 days and apply another coat, it'll last for a good 10 months. It doesn't state that on the paste version, but it does on the liquid version.