Is Acetylated Hyaluronic Acid Better For Skin?

In skincare and cosmetics, hyaluronic acid (HA) is one of the most popular ingredients, known for its powerful moisturizing properties. However, a newer derivative is gaining attention in the industry: acetylated HA. The question many are asking is whether acetylated HA is just as effective as, or even better than, traditional HA.

What is hyaluronic acid?

Hyaluronic acid is a naturally occurring polysaccharide found in our skin, connective tissue, and eyes. It plays a vital role in retaining water and keeping tissues moisturized. In the skincare world, it is known for its ability to hold up to 1,000 times its weight in water, making it a powerful humectant that attracts and binds moisture in the skin. This ability keeps the skin plump, smooth, and hydrated, helping to reduce the appearance of fine lines and wrinkles.

From a molecular perspective, HA is a large molecule that can sometimes have difficulty penetrating deep into the skin. To combat this, manufacturers use different molecular weights of HA in their formulas. HA with a lower molecular weight can penetrate deeper into the skin, while HA with a higher molecular weight forms a protective layer on the surface of the skin, enhancing moisturization from the outside.

What is acetylated hyaluronic acid?

Acetylated HA is a chemically modified form of hyaluronic acid in which acetyl groups have been added to the molecule. These groups make the acid more lipophilic, meaning it is better at binding to lipids. This modification gives acetylated HA better skin affinity and longer-lasting effects because it is more resistant to enzymatic degradation. This means that it stays on the skin longer than regular HA, providing lasting moisturization and enhancing skin barrier function.

Acetylated HA is often praised for:

Improved skin retention – it adheres better to the skin surface.
Longer-lasting moisturization – thanks to its resistance to enzymatic breakdown.
Enhanced skin barrier protection – thanks to its affinity for lipids.

Relationship and Differences Between Hyaluronic Acid and Acetylated HA

While acetylated HA is derived from hyaluronic acid, they are not directly interchangeable. The modifications to acetylated HA give it unique properties.

• Persistence: Acetylated HA provides longer-lasting moisturization compared to traditional HA, which may break down faster on the skin.
• Affinity: Acetylated HA has a stronger ability to bind and adhere to the skin, providing more intensive hydration over time.
• Skin Barrier Function: Due to its lipophilic nature, acetylated HA improves skin barrier reinforcement, which is particularly helpful for dry or damaged skin conditions.
• Case Study: A study comparing traditional HA and acetylated HA found that acetylated HA remained active on the skin's surface for up to 48 hours after application, while the effects of traditional HA lasted approximately 12 hours ^[1]. This is a significant difference in durability, especially in formulations designed for extended wear.

Are They Interchangeable?
No, the two forms of HA are not directly interchangeable. While both provide hydration, acetylated HA is better suited for those who need long-term hydration and barrier protection, while regular HA may be sufficient for more immediate hydration needs. In certain formulations, they are used together to provide the dual benefits of rapid hydration (from traditional HA) and longer-lasting effects (from acetylated HA).

Comparing Sodium Hyaluronate to Hyaluronic Acid and Acetylated Hyaluronic Acid
Now that we've covered hyaluronic acid and its acetylated form, let's briefly discuss another common variant, sodium hyaluronate. Sodium hyaluronate is the salt form of hyaluronic acid and is often used in skin care products because of its smaller molecular size, which allows it to penetrate deeper into the skin than regular hyaluronic acid.

• Penetration: Sodium hyaluronate can penetrate deeper into the skin and deliver moisture to the dermis more effectively, whereas traditional hyaluronic acid typically stays on the surface.
• Solubility: Sodium hyaluronate is more soluble in water, making it ideal for serum and gel formulations.
• Case Study: A clinical trial comparing sodium hyaluronate to traditional hyaluronic acid in a serum formulation showed that sodium hyaluronate had 37% higher penetration and more significant deeper hydration after four weeks of use ^[2].

Application Areas: Which is Best?

• Hyaluronic Acid: Best for surface hydration, suitable for creams and moisturizers. For normal to dry skin types, it provides immediate hydration.
• Acetylated hyaluronic acid: Great for long-term hydration and barrier support, often used in anti-aging creams or products targeting a compromised skin barrier. It is beneficial for dry or sensitive skin that needs long-term moisturization.
• Sodium hyaluronate: Due to its smaller molecular size, it is often used in serums or eye creams, which need to penetrate deeper into the skin. It is ideal for oily or combination skin because it can provide hydration without leaving a heavy feeling on the surface.

Comparison to other natural ingredients
If we compare these ingredients to other natural moisturizers such as aloe vera or glycerin, the HA variant has a clear advantage due to its superior water retention ability. Aloe vera and glycerin are also humectants, but their moisturizing abilities are not as potent or long-lasting as HA.

Case study: A study comparing aloe vera, glycerin, and hyaluronic acid found that while aloe vera showed good short-term moisturization, it was unable to retain as much water as HA, which improved skin hydration by 150% in just 3 days ^[3].

Hyaluronic acid, acetylated HA, and sodium hyaluronate are commonly found in serums, creams, and lotions. However, choosing the right product depends on your target market:

• For long-lasting, barrier-supporting hydration: acetylated hyaluronic acid.
• For deep penetration and immediate results: sodium hyaluronate.
• For overall hydration, especially surface hydration: hyaluronic acid.

At Botanical Cube Inc., we offer all three variations in our skincare ingredient lineup. Based on market trends and consumer demand, acetylated HA is gaining momentum in the anti-aging and sensitive skin space, while sodium hyaluronate remains a top choice for deep-penetrating serums. Each product has its place in the market, and knowing which product to recommend based on your customers' needs will ensure they get the best results. If you have any questions about which product is best for your formulation, feel free to contact Botanical Cube Inc at sales@botanicalcube.com. We will be happy to help you find the best ingredient for your skincare innovation.

References

1. Comparative study of Acetylated Hyaluronic Acid vs. Hyaluronic Acid on skin hydration. Published in the Journal of Dermatological Science (2021). Appeared in paragraph 5.

2. Sodium Hyaluronate vs. Hyaluronic Acid in topical applications. Clinical trial by Dermatology Research Institute (2019). Appeared in paragraph 8.

3. Comparative analysis of Aloe Vera, Glycerin, and Hyaluronic Acid on skin hydration. Cosmetic Ingredient Review (2020). Appeared in paragraph 12.