I purchase all my facial needs through this company, so far I have enjoyed every product that I have ordered. This collagen goes on smoothly, easilty, and cools my skin after cleansing and toner. I will continue to use any of my skin needs from this company.

I’ve been using this for my smile lines. And I see an improvement. Like the texture. It goes well under makeup. Nice serum overall.

I prefer the collagen peptide serum over the cream. It’s lighter and absorbs faster. I’m in my 50s and recently discovered peptides - they are great.

It’s one of the best serums I’ve used. Leaves the skin nice and moisturized. I use the retinoid afterwards, and don’t even need a cream. In the morning, my skin is soft and smooth.

It’s a staple in my skincare routine now. I also use the vitamin C and the SPF from OPen Formula in the morning. My skin looks so glowy. I’m even getting compliments.

I think this is my new favorite skincare product. I use 5-6 other Open Formula products and they are all very nice. But this one just leaves my skin feeling so nice.

Good product. I wish they had a larger size available

It is great for my neck. I won’t say it’s like a ‘neck lift’ but it’s pretty damn close for a skincare product

I totally recommend this product. The lines on my forehead and around my mouth look a lot better after a few weeks. And the skin on my neck feels more firm

It’s a very thin serum, but still nice and moisturizing. I use the squalane in the dry winter months for an extra moisture boost. But in spring/summer, this one is perfectly sufficienrt