Why the Percentage of Hyaluronic Acid Is Not a Measure of Quality
A higher percentage of hyaluronic acid does not automatically mean a better effect.
What matters is the type of forms used, their molecular weight, and the way they are combined within a formulation.
Hyaluronic acid is one of the most commonly used substances in cosmetics. Despite this, it is often subject to simplifications. One of the most frequent assumptions is that a higher percentage of hyaluronic acid automatically indicates a higher‑quality product. In reality, the situation is significantly more complex.
Hyaluronic Acid Is Not a Single Substance
Hyaluronic acid is a polymer whose properties vary substantially depending on molecular weight — that is, the length of the polymer chains.
High‑molecular‑weight hyaluronic acid primarily acts on the surface of the skin, where it binds water and forms a hydrating film.
Low‑molecular‑weight hyaluronic acid penetrates deeper into the skin and supports hydration and regeneration over the long term.
Each form has its role, and meaningful results arise from their balanced combination.
Why Percentages Can Be Misleading
The solubility of hyaluronic acid in water depends on its molecular weight.
High‑molecular‑weight forms may have a solubility of approximately 0.5%.
Low‑molecular‑weight forms can dissolve at concentrations exceeding 5%.
This leads to a key conclusion:
The same percentage does not mean the same functionality.
Two products with the same declared concentration may differ in:
– the ratio of molecular weights used
– their behaviour in an aqueous environment
– and consequently in their effect on the skin
What Matters More Than the Percentage Itself
When evaluating a cosmetic serum containing hyaluronic acid, it is more meaningful to consider:
– which molecular weights are used
– whether different forms are combined
– how the mixture is technologically prepared
– whether the formulation makes sense in terms of solubility and stability
A percentage value alone, without this context, does not provide meaningful information about product quality.
Understanding Instead of Simplification
Hyaluronic acid is an exceptional substance when handled with respect for its physico‑chemical properties.
For this reason, we prefer balanced mixtures of different forms rather than pursuing the highest possible percentage.
We believe that understanding is the foundation of truly functional skin care.
FAQ – Hyaluronic Acid and Percentages
Does a higher percentage mean a better serum?
No. The percentage alone does not indicate quality or effect.
Why are percentages insufficient as an indicator?
Because different forms of hyaluronic acid have different solubility and behaviour in the skin.
What is the difference between individual forms of hyaluronic acid?
They differ in molecular weight and in where they act within the skin.
What matters more than the percentage itself?
The combination of forms, their technological processing, and the overall coherence of the formulation.