Making hyaluronic acid gel at home requires just a few ingredients: hyaluronic acid powder, distilled water, and a preservative. The standard approach is to create a 1% stock solution, meaning 1 gram of powder dissolved in roughly 99 grams of water. This produces a viscous, gel-like serum you can use on its own or mix into other skincare formulations.
What You Need Before You Start
Hyaluronic acid powder is sold by cosmetic ingredient suppliers in two general categories: high molecular weight (1,000 to 1,400 kDa) and low molecular weight (20 to 300 kDa). High molecular weight powder creates a thicker gel that sits on the skin’s surface and provides a smooth, plumping feel. Low molecular weight powder produces a thinner, less viscous solution, but it actually penetrates through the outer layer of skin, while the larger molecules cannot. Many DIY formulators buy both and blend them for a gel that works at multiple depths.
Beyond the powder itself, you’ll need:
- Distilled water (tap water contains minerals and microbes that shorten shelf life)
- A digital kitchen scale that reads to 0.1 grams
- A glass beaker or measuring cup for mixing
- A preservative (more on this below)
- A clean pump bottle or dropper bottle for storage
Wash all equipment in warm water with detergent, rinse under hot running water, and dry with a lint-free cloth before you begin. Any bacteria introduced during mixing will thrive in a water-based gel.
The Basic 1% Stock Solution
A 1% concentration is the easiest starting point and produces a nicely viscous gel. For a 100-gram batch, weigh out:
- 1 gram hyaluronic acid powder
- 0.5 grams preservative (such as Liquid Germall Plus)
- 98.5 grams distilled water
Pour the distilled water into your beaker first. Then slowly sprinkle the hyaluronic acid powder over the surface. This is where patience matters. The powder clumps aggressively on contact with water, and even a 1% solution gets gooey. Stir gently with a clean spatula or spoon, breaking up clumps as they form. Avoid whipping in air bubbles.
Once you’ve mixed it as well as you can, cover the beaker and let it sit. High molecular weight powder typically needs several hours, sometimes overnight, to fully hydrate and dissolve. You’ll know it’s ready when the gel is smooth, clear (or slightly hazy), and free of visible powder clumps. Trying to push past 2% concentration with standard high molecular weight powder is extremely difficult with normal mixing, and studies show there’s not much additional skin benefit above 2% anyway.
Choosing a Preservative
Any water-based product without a preservative is a breeding ground for bacteria and mold. If you skip this step, your gel must be refrigerated and used within one to two weeks. With a proper preservative, it can last up to three months.
The preservative you choose depends partly on the pH of your final product. Hyaluronic acid gel in distilled water typically falls in the pH 5 to 7 range. Good options for this window include phenoxyethanol (effective from pH 6.0 to 8.0), potassium sorbate paired with sodium benzoate (both work well in water-based products), and sorbic acid (effective from pH 3.5 to 6.0). Liquid Germall Plus is popular in the DIY community because it’s broad-spectrum and easy to use at a low percentage. Follow whatever usage rate the supplier recommends for your specific preservative, and add it to the water before or after the powder hydrates, depending on the preservative’s instructions.
Adjusting Thickness and Concentration
Your 1% stock solution is the building block. You can use it straight as a serum, or you can dilute it into other formulations at lower concentrations. The math is simple: if you use 20% of your 1% stock in a formula, your final product contains 0.2% hyaluronic acid. Using the full stock undiluted gives you the maximum 1% concentration.
If you want a thicker gel, use high molecular weight powder exclusively. If you want something lighter that absorbs quickly, use low molecular weight powder. You can also make a stock of each and blend them together. A common approach is roughly 70% high molecular weight stock and 30% low molecular weight stock, though the ratio is flexible and comes down to the texture you prefer.
For a richer product, some formulators add a small amount of vegetable glycerin (2 to 5% of the total formula) as an additional humectant. This adds body and extra moisture-binding capacity without changing the gel’s basic character.
Adding Other Active Ingredients
Hyaluronic acid gel plays well with most water-soluble actives. Niacinamide and vitamin C are both safe to combine with hyaluronic acid, and all three are suitable for all skin types with very low risk of irritation. Since both hyaluronic acid and niacinamide are water-based, they mix easily in the same formula.
One thing to watch is pH. Hyaluronic acid is stable across a wide pH range, but it shows slight degradation at extremely acidic (below pH 2) or extremely alkaline (above pH 12) levels. For practical DIY purposes, keeping your gel between pH 4.5 and 7 is ideal. This matters most when adding vitamin C in its pure ascorbic acid form, which drops pH significantly. If you’re adding acidic actives, test the final pH with strips and adjust if needed.
Storage and Shelf Life
Pour your finished gel into a clean pump bottle or dropper bottle. Dark glass is preferable to clear plastic, as it limits light exposure. Store it in a cool place away from direct sunlight.
With a preservative, expect about three months of usable life. Without one, keep it in the refrigerator and finish it within one to two weeks. If the gel changes color, develops an off smell, or becomes cloudy when it was previously clear, discard it. Making small batches (50 to 100 grams) helps you use it up before degradation becomes an issue.
How to Apply Your Gel
Hyaluronic acid is a humectant, meaning it works by pulling water toward itself. Applied to damp skin, it draws that surface moisture in. Applied to completely dry skin in a dry climate, it can actually pull moisture from deeper skin layers instead of attracting it from the environment, leaving your skin feeling drier than before.
The most effective routine is to apply a few drops of your gel to skin that’s still slightly damp from cleansing or a quick mist of water. Pat it in gently, then follow with a moisturizer that contains occlusive ingredients like dimethicone or petrolatum. The hyaluronic acid pulls water in, and the occlusive layer on top prevents that water from evaporating. Without that sealing step, much of the hydration benefit is lost to evaporation, which is why hyaluronic acid alone is not a complete moisturizer.