How to Make Hyaluronic Acid Serum: Complete Beginner's Guide

If you've ever wanted to create your own facial serum, hyaluronic acid serum is one of the easiest and most rewarding places to start.

This step-by-step guide walks you through the process of making a simple water-based hyaluronic acid serum and explains the key formulation principles used across many of our serum recipes. Once you understand this method, you'll be able to confidently create a wide range of customised serums using ingredients such as niacinamide, tranexamic acid, aloe vera juice, hydrosols, panthenol and more.

Whether you're making your very first serum or expanding your DIY skincare skills, this guide will help you understand not just how to make a serum, but why each ingredient is included and how the process works.

Watch the Step-by-Step Video Tutorial, How to Make Hyaluronic Acid Serum

Hyaluronic acid has become a staple in modern skincare, so we thought we'd break down what it actually is and share a couple of easy DIY recipes so you can make your own.

Hyaluronic acid (HA) is a type of glycosaminoglycan, essentially a very large, water-loving sugar molecule. It occurs naturally throughout the body, especially in connective tissue, where it helps maintain the structure of the extracellular matrix, the supportive “scaffolding” around our skin cells.

One of the reasons HA is so popular is its impressive ability to attract and hold moisture. It binds significant amounts of water relative to its size, which contributes to that hydrated, plump look in the skin. As we grow older, our natural levels gradually decline, which is partly why HA is also widely used in cosmetic injectables and lip fillers.

In topical skincare, hyaluronic acid stays within the surface layers of the skin because of its large molecular size. It does not reach the deeper layers, but it can still create a visible cosmetic effect by drawing moisture to the surface and helping the skin appear smoother, fresher and more hydrated. This is why hyaluronic acid serums are popular for giving the skin a plump, healthy-looking finish after application.

HA also layers beautifully with other products. Applying a moisturiser on top helps lock in that surface hydration and enhances the overall effect. You can use it daily if you like, or simply reach for it whenever your skin needs an instant boost of hydration.

Follow along with our complete Hyaluronic Acid Serum tutorial as we demonstrate the entire process from weighing ingredients through to bottling your finished serum.

What Is Hyaluronic Acid Serum?

Hyaluronic acid serum is one of the most popular skincare products in the world. Known for its ability to attract and hold moisture, it helps the skin feel hydrated, refreshed and visibly plumper.

Despite its name, hyaluronic acid is not an exfoliating acid. It is a naturally occurring humectant that attracts water to the skin's surface, making it a valuable ingredient in daily skincare routines.

Because it works well with a wide range of cosmetic ingredients, hyaluronic acid is often used as the foundation of many serum formulations.

How to Use Hyaluronic Acid Serum

For best results, apply hyaluronic acid serum to slightly damp skin. HA attracts water, so giving it a little moisture to work with helps it sit comfortably on the skin and improves that hydrated finish.

Recommended order in your skincare routine

1. Cleanser
2. Toner or hydrosol mist (leave the skin lightly damp)
3. Hyaluronic acid serum
4. Face oils and/or moisturiser

Using a moisturiser or oil after your HA serum helps seal in the surface moisture, supporting a smoother, more hydrated appearance. HA works well on its own, but it performs even better when followed by a cream or oil because these occlusive or emollient layers help slow water loss.

You can use HA morning or evening, or both if your skin enjoys it.

Why Start With a Hyaluronic Acid Serum?

For beginner formulators, hyaluronic acid serum offers several advantages:

• Simple ingredient list
• Easy formulation process
• Suitable for most skin types
• Compatible with many active ingredients
• Excellent base for future customisation

Many advanced serums begin with the same water-based structure demonstrated in this tutorial. Once you've mastered the fundamentals, creating customised formulations becomes much easier.

Hyaluronic Acid Serum recipes

Here's a couple of easy DIY hyaluronic acid serum recipes to get you started
Simple 1% Hyaluronic Acid Serum
Hero Hyaluronic Acid Serum

Essential Equipment

• Precision digital scales
• Heat-resistant beaker or mixing jug
• Stirring rod or mini spatula
• Small whisk or electric milk frother (optional)
• Sanitised serum bottles or dropper bottles
• Spray bottle containing isopropyl alcohol for sanitising

Why Accurate Measuring Matters

Skincare formulations rely on percentages rather than approximations. Using digital scales ensures ingredient accuracy, consistency between batches and improved product stability.

Understanding the Core Ingredients

Learning what each ingredient contributes to a formula helps you make informed decisions when customising recipes later.

Distilled Water

Distilled water forms the foundation of most water-based serums. It acts as the carrier for the remaining ingredients and provides the lightweight texture commonly associated with facial serums.

Many future serum recipes will replace a portion of the distilled water with ingredients such as:

• Rose Hydrosol
• Lavender Hydrosol
• Chamomile Hydrosol
• Aloe Vera Juice
• Cucumber Hydrosol

The overall method remains the same.

Hyaluronic Acid

Hyaluronic acid is the star ingredient in this formulation. Its primary role is to attract and hold moisture within the upper layers of the skin, helping the skin appear smoother and more hydrated.

One of the most common questions beginner formulators ask is:

"Why does hyaluronic acid clump?"

The answer is pretty simple. Hyaluronic acid powder absorbs water rapidly when first introduced to a formula. This creates temporary clumps that gradually hydrate and disperse over time. This is completely normal and one of the reasons we recommend allowing the serum to sit overnight before final evaluation.

Glycerin

Glycerin is another highly effective humectant. It works alongside hyaluronic acid by attracting moisture and improving the skin's hydration levels. Glycerin also contributes to the slip and skin feel of the finished serum.

Preservatives

Any product containing water requires preservation. Without an effective preservative system, bacteria, mould and yeast can develop within the product over time.

Common preservative systems used in our serum recipes include:

• Geogard 221
• Microcare DB

Always use the recommended preservative percentage specified in your recipe.

Step-by-Step Method

Step 1: Sanitise Equipment

Before beginning any formulation, thoroughly sanitise all equipment, containers and work surfaces. Good practices help improve product quality and reduce contamination risks.

Step 2: Combine Your Water Phase

Add the distilled water to your mixing vessel. If your recipe includes hydrosols or aloe vera juice, they will generally be added during this stage as part of the water phase.

Step 3: Add Humectants and Active Ingredients

Add ingredients and mix thoroughly until dissolved.

Step 4: Add Hyaluronic Acid

Slowly sprinkle the hyaluronic acid powder over the surface of the liquid. Avoid dumping it in one pile. Continue stirring gently. Some clumping is expected.

Step 5: Allow Hydration Time

Cover the mixture and allow it to sit for several hours, preferably overnight.

This hydration period allows the hyaluronic acid to fully absorb water and develop its final texture.

Step 6: Add Preservative

Once the serum is fully hydrated and smooth, add the preservative and mix thoroughly.

Step 7: Bottle Your Serum

Transfer the finished serum into sanitised bottles. Dropper bottles are popular for facial serums because they allow controlled dispensing and help minimise contamination during use.

Understanding pH

Many skincare ingredients perform best within a specific pH range. For most beginner serum formulations, a target pH between 5 and 7 is generally appropriate. While pH testing is optional for hobby formulators, it becomes increasingly important as formulations become more advanced.

Common Questions

My Serum Looks Clumpy

This is usually caused by partially hydrated hyaluronic acid. Allow additional hydration time and stir again.

My Serum Is Too Thick

The serum may require additional hydration time or a lower concentration of hyaluronic acid in future batches.