I received a full size of Puregen Multi Collagen Lifting Serum in my June LUXPLUX BOX. I used the whole bottle, 2xs a day, AM/PM after my essence. I can really tell a big difference in how much firmer my skin feels. Mainly, my cheeks. I love this product so much, I came back to order another bottle! Yes, its pricey but, when an all natural product preforms as it says it will, that product is worth every penny! Im 58, soon to be 59 y/o. I have been using collagen products for several years but, because Puregen is more like a thinner liquid, I love using it over my essence. That way, it absorbs quickly and I dont feel like Im layering too many thick creams on my face. I do apply my serum and moisturizer over top, after the collagen absorbs. I cant even tell, Ive layered this product because, it is a thinner, viscosity. If you use collagen and want to try a collagen that layers beautifully AND is effect, I highly recommend this Puregen Multi Collagen Power Lifting Serum.