Hyaluronic acid rarely appears as “hyaluronic acid” on a product’s ingredient list. Instead, it shows up under a range of official names, most commonly “sodium hyaluronate,” the salt form that’s easier to formulate and more stable in finished products. Knowing these names helps you spot HA on any label, whether it’s a serum, moisturizer, or supplement.
The Most Common Label Name: Sodium Hyaluronate
The name you’ll encounter most often is sodium hyaluronate. This is the water-soluble salt form of hyaluronic acid, and it dominates ingredient lists for a practical reason: it dissolves easily in water, stays stable across different pH levels and temperatures, and produces smoother textures in water-based products. Many brands market a product as containing “hyaluronic acid” on the front of the package while listing sodium hyaluronate in the actual ingredients on the back. That’s not deceptive. Sodium hyaluronate is simply the formulation-friendly version of the same molecule.
The two forms do differ slightly. Sodium hyaluronate has a smaller molecular structure than native hyaluronic acid, which allows it to penetrate deeper into the skin’s surface layers. Pure hyaluronic acid, with its larger molecules, tends to sit on the surface and form a hydrating film. When you do see “hyaluronic acid” listed by its own name, the product is using that native, unmodified form.
Hydrolyzed Hyaluronic Acid
If you see “hydrolyzed hyaluronic acid” on a label, the molecule has been broken into smaller fragments using acid, enzymes, or another method. Standard hyaluronic acid ranges from 5 to 1,800 kiloDaltons in molecular weight, a huge span. Hydrolyzed versions sit at the lower end of that range, which is the whole point: smaller fragments penetrate more readily. Products that advertise “low molecular weight” HA are typically using this hydrolyzed form. Some serums blend both hydrolyzed HA and standard sodium hyaluronate to hydrate at multiple depths.
Sodium Hyaluronate Crosspolymer
This name signals a modified version where hyaluronic acid chains have been chemically linked together into a mesh-like network. The crosslinking makes the molecule more resistant to breaking down on the skin, so it provides longer-lasting hydration compared to standard HA. On a label, you’ll see it written exactly as “sodium hyaluronate crosspolymer.” It often appears alongside regular sodium hyaluronate rather than replacing it.
Sodium Acetylated Hyaluronate
This is a newer derivative where small chemical groups have been grafted onto the hyaluronic acid chain. The modification makes it penetrate roughly twice as deep into skin compared to the non-acetylated version of the same molecular weight, and it resists the enzymes that naturally break down HA. In testing, acetylated HA penetrated to about 100 micrometers into skin, while the standard form reached only about 50. It also showed a meaningful ability to protect collagen from degradation, something the unmodified form did not achieve at the same concentration. On labels, it appears as “sodium acetylated hyaluronate.”
Potassium Hyaluronate
Less common than the sodium version, potassium hyaluronate is another salt form of hyaluronic acid. It functions as a film-forming agent, creating a thin moisture-retaining layer on the skin’s surface. The Cosmetic Ingredient Review panel has assessed it as safe at current use concentrations. You’ll occasionally spot it in products formulated for sensitive skin or in formulations where the manufacturer wanted to avoid sodium-based ingredients.
Botanical Alternatives Labeled as HA
Some products, especially in the clean beauty space, use a plant-derived ingredient that mimics hyaluronic acid’s behavior. The most common source is Cassia angustifolia, also known as Indian senna seed. The polysaccharides extracted from these seeds have a similar moisture-binding structure to HA. On the ingredient list, this shows up as “Cassia angustifolia seed polysaccharide,” not as hyaluronic acid. Brands may call it “botanical hyaluronic acid” or “plant-based HA” in their marketing copy, but the official ingredient name will reference the plant.
Where HA Falls on the Ingredient List
Cosmetic ingredient lists are ordered by concentration, from highest to lowest. Hyaluronic acid in any form is effective at very low percentages, so you’ll almost always find it in the bottom third or bottom half of the list. That placement is normal and doesn’t mean the product contains too little to work. HA is a potent humectant even in small amounts, and higher concentrations can actually make a product feel sticky without adding benefit. Seeing sodium hyaluronate listed near the end, after water and the bulk ingredients, is exactly what you’d expect.
Quick Reference: Names to Look For
- Hyaluronic acid: the native, unmodified form
- Sodium hyaluronate: the most common salt form, smaller molecule
- Hydrolyzed hyaluronic acid: broken into smaller fragments for deeper absorption
- Sodium hyaluronate crosspolymer: crosslinked for longer-lasting hydration
- Sodium acetylated hyaluronate: modified for deeper penetration and collagen protection
- Potassium hyaluronate: an alternative salt form, film-forming
- Cassia angustifolia seed polysaccharide: plant-based HA alternative
If a product claims to contain hyaluronic acid, one or more of these names will appear in the ingredient list. When you see several of them in the same product, the brand is using a multi-weight or multi-type HA blend designed to hydrate at different levels of the skin.