What is Hyaluronic Acid?
Hyaluronic acid ("HA") naturally exists in our body. It is found in the highest density in our eyes and joints. It plays many roles important roles as discuss here, including lubrication and joint cushion As we age, the rate at which we produce HA slows down.
The Ordinary notes that the natural function of HA in our body is not for hydration. In its natural molecular state, HA cannot penetrate our skin surface. Instead, it sits on top, drawing out moisture to make the skin feel hydrated. Hence, by using various molecular weight of HA as well as HA crosspolymer, they "hang out" longer on your skin surface to enhance that "moist" feeling as well as hydration at deeper level.
Hyaluronic Acid 2% + B5
Aqua (Water), Sodium Hyaluronate, Pentylene Glycol, Propanediol, Sodium Hyaluronate Crosspolymer, Panthenol, Ahnfeltia Concinna Extract, Glycerin, Trisodium Ethylenediamine Disuccinate, Citric Acid, Isoceteth-20, Ethoxydiglycol, Ethylhexylglycerin, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol.
Easily seen in the ingredient list, Sodium Hyaluronate and its crosspolymer are the main players in this mix. They are modified forms of HA with small molecular size, which helps them penetrate better. "Crosspolymer," from my layman understanding, is the substance--here it is sodium hyaluronate--attached to a polymer structure (think of it like a vehicle) which keeps the the substance at the skin surface to enhance hydration. Understand that it works by attracting water to itself. See more here.
I have combination/ oily skin. This HA mixture is good, but it takes a while to dry for me and keeps me pretty shiny. My skin definitely feels hydrated. However, I live in Miami with a very high level of humidity, my face feels a little "tacky" after combining this with 2 other serums.
>>> The bottom line is: It works great, but listen to your skin.
Aqua (Water), Glycerin, Algae Extract, Pseudoalteromonas Exopolysaccharides, Pseudoalteromonas Ferment Extract, Ahnfeltia Concinna Extract, Arginine, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Aspartic Acid, PCA, Sodium PCA, Sodium Lactate, Salicylic Acid, Citric Acid, Propanediol, Dimethyl Isosorbide, Ethoxydiglycol, Polysorbate 20, Potassium Sorbate, Sodium Salicylate, Sodium Benzoate, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol.
Totally different combination here. Technically, this is not an HA mix. It does, however, work to achieve similar result. Those two main ingredients with long, unpronounceable names are formed by the fermentation of marine bacterial strain. It's actually a fascinating process. I do not understand it fully myself. If you want to know more, start here.
>>> The bottom line is: it carries a light scent (I am guessing from the fermentation process), but my skin much prefers this formula. Much lighter and absorbs much faster.
I use these HA formulas in combination with Niacinamide and the "Buffet" mix. Check them out at The Ordinary and let me know how they work for you.