Yon-Ka Advanced Optimizer Serum (30ml) Anti-Aging Face Serum Gel with Marine Collagen and Hyaluronic Acid, Clinically Proven to Firm and Lift Skin, Paraben-Free

Advanced Optimizer Serum is another great product from this line and works perfectly before using a day/night cream. One pump goes a long way and is able to cover my entire face. It is very smooth and spreads easily. I love the consistency of this product because I can pump it onto the back of my hand and its gel-like texture keeps it from running off allowing me to use all the product. I feel like a lot of serums are too fluid and it’s hard to contain it from running off your hand. Very moisturizing and absorbs nicely.

My new favorite serum, makes my skin feel tight and youthful. Love to use this product on my neck and chest as well. Noticed a difference after just a couple weeks!

Love applying this product as it smells nice and feels so smooth and moisturizing. I’ve noticed a lovely change is my 45 year old skin as well. It’s only been a few weeks but I’m definitely going to stick with it!

My Estheticians Yonka product has bright yellow serum mixed with an oil that has to be shaken so it mixes before you spray. The smell is very beautiful.Product is very expensive has to be the real deal.Product I received didn’t have a sealed box and product did not have a beautiful smell nor did it separate

I love Yon Ka! This crime with the firming serum is like a mini face lift. With in the first week, your face is glowing, hydrating and feels wonderful!By the second week laugh lines, dark eyes, and fine lines are brighter and plumper. Friends notice and people you will stop you when you are out and tell you how what beautiful skin you have! At 54 I am more than satisfied, I am realistic, I don't want to look twenty but I like having hydrated, bright and firmer skin. The wonderful spa arouma makes the morning and evening routine even more smoothing and relaxing. Most important, you may look at the price and think no way, but you only need a few drops so it lasts for 6 - 8 weeks. Absolutely more than a 5 star product on every scale!

Nice scent.

I'll try to update once I've used this longer but after 2 weeks I can tell a difference. I would say it's just that I look a bit more rested at this point but I'm encouraged that I can tell it's doing something

I use this with Phyto 52 cream and it works very well. My skin feels very good and smooth in the morning. I have very dry and sensitive skin and this gives it the added moisture it needs.

This is my second purchase of this product and I will purchase another. It is expensive so I am going to wait to see if they come on sale this up coming season.

This is great serum, especially when used with Yon-Ka lotion and Daily cream

Love this product. It really makes a difference in fine lines appearance!

I love this product!