Some formulation notes from Engineer Lin
In the past year or two, quite a few skincare brands have come to us with a similar request: they want a serum focused on anti-photoaging.
Most of them are not looking for a heavy anti-aging cream. What they want is something lighter, something that fits easily into a daily skincare routine, but still offers protection against long-term UV damage.
From a formulation point of view, that usually means building a good antioxidant system first, and then making sure the texture works well as a serum.
Below are a few notes from our internal discussions when we design this type of formula
Why Photoaging Needs Antioxidant Systems
When skin is exposed to UV radiation for long periods of time, it starts producing reactive oxygen species (ROS).
These molecules gradually damage collagen fibers and accelerate the aging process. Over time this shows up as wrinkles, dullness, and uneven pigmentation.
Because of this mechanism, most anti-photoaging formulations start with antioxidants.
Ferulic-acid based ingredients are often part of these systems. In some of our formulation discussions we look at derivatives such as Arginine Ferulate, which combine ferulic acid with amino-acid structures. These kinds of ingredients are interesting because they can provide antioxidant activity while remaining relatively compatible with serum formulations.
Thinking About the Formula Before Choosing Ingredients
One thing we often tell customers is that the structure of the formula matters as much as the actives.
Many brands start by listing trendy ingredients, but from a formulator’s perspective the first question is simpler:
What kind of serum texture do we want?
Most modern serums are built as very light gel systems.
A typical base might include:
- purified water
- glycerin
- butylene glycol
Then a rheology modifier such as carbomer is used to create a light gel network.
The goal here is not thickness, but stability and spreadability.
If the serum feels heavy or sticky, most consumers simply stop using it.
Choosing the Active Ingredients
Once the base is stable, we start looking at the antioxidant system.
In anti-photoaging formulas this can include combinations such as:
- ferulic acid derivatives
- amino-acid based antioxidants
- retinoid derivatives like HPR
Different brands choose different directions depending on the positioning of the product.
In some cases we evaluate ingredients like Arginine Ferulate, which can work as part of the antioxidant system while fitting well into water-based serum structures.
A Simple Reference Structure
Below is a simplified reference formula that illustrates the basic idea.
| Phase | Ingredient | Purpose |
|---|---|---|
| A | Deionized Water | Base |
| A | Glycerin | Humectant |
| A | Carbomer | Gel structure |
| B | Arginine Ferulate | Antioxidant active |
| B | Butylene Glycol | Solvent |
| C | Phenoxyethanol | Preservation |
| C | Triethanolamine | pH adjustment |
In real development work, this structure is usually modified quite a bit. The final concentrations depend on stability testing, sensory evaluation, and the overall product concept.
A Small Detail That Often Gets Overlooked
One thing we often notice in early prototypes is that too many actives are added at once.
From a marketing perspective this sounds attractive. From a formulation perspective it can create instability or unpleasant texture.
In many cases, a cleaner formula with two or three well-chosen actives performs better than a crowded ingredient list.
Final Thoughts
Anti-photoaging products will probably remain popular for a long time. As UV exposure and environmental stress continue to affect skin health, brands are looking for formulations that provide daily protection without feeling heavy.
From a formulator’s perspective, the challenge is fairly practical:
build a stable antioxidant system, keep the texture elegant, and make sure the product works well in real-world skincare routines.