Vitamin C: Natural vs. Synthetic
A considered examination of the source, structure, and skin compatibility for natural vs. synthetic forms of Vitamin C.
Vitamin C: Natural vs. Synthetic
A considered examination of the source, structure, and skin compatibility for natural vs. synthetic forms of Vitamin C.
Vitamin C remains one of the most extensively studied and widely endorsed ingredients in skin care. Its role in antioxidant defence, collagen synthesis, and the mitigation of environmental stress is irrefutably proven. Yet within this consensus lies a more nuanced question: not whether Vitamin C is effective, but how its form shapes its function.
Increasingly, research suggests that this distinction is not marginal. It is foundational.
Two Expressions of the Same Molecule
In topical formulations, Vitamin C typically appears in one of two forms. The first is synthetically derived L-ascorbic acid—an isolated compound, widely used in the industry. The second is natural Vitamin C, as it exists within whole plant systems, where it is embedded in a complex biochemical matrix.
Both ultimately deliver ascorbic acid to the skin. But how these different forms of Vitamin C are stabilized, transported, and interact with the skin is divisively different.
Fig 2.
Australian Kakadu Plum, the world’s richest natural source of Vitamin C.
Absorption Without Compromise
L-ascorbic acid presents a well-documented formulation challenge. In its original state, it struggles to be absorbed by the skin. To be effective, it is formulated to be highly acidic—with a pH typically below 3.5. This temporarily disrupts the skin barrier enabling the L-ascorbic acid to pass through. [1]
Though this approach allows the synthetic Vitamin C to be effective, it has consequences. For many, particularly those with sensitive or compromised skin, this manifests as irritation, redness, or stinging. A common deterrent for people avoiding Vitamin C.
In contrast, natural Vitamin C within a whole plant matrix—such as that found in Australian Kakadu Plum or Acerola Cherry—follows a fundamentally different pathway. Here, ascorbic acid is accompanied by polyphenols—such as gallic and ellagic acids—that act as molecular chaperones. These compounds help transport the Vitamin C into the skin without requiring barrier disruption, facilitating uptake while maintaining physiological balance. [2]
This natural approach prevents the likelihood of an inflammatory response from Vitamin C.
Stability As Efficacy
The instability of L-ascorbic acid is widely acknowledged. Once exposed to air and light, it begins to oxidize, with meaningful reductions in potency often occurring within weeks of opening. [3] The resulting degradation not only diminishes efficacy but can contribute to surface-level irritation.
Whole-plant Vitamin C behaves differently. Encased within a dense, low-water-activity matrix, the molecule is inherently shielded from oxidative stress. This structural environment slows degradation and preserves activity over time. [4]
There is also a secondary advantage: certain plant compounds, notably ellagic acid, as found in Australian Kakadu Plum, actively support the recycling of oxidized Vitamin C via glutathione pathways. This creates a regenerative antioxidant system—one that extends functionality beyond initial application. [5]
Synthetic formulations, by contrast, offer no comparable mechanism of renewal; swiftly losing their potency and becoming rapidly less stable.
A Higher Standard, Naturally
Kakadu Plum exemplifies the potential of plant-matrix Vitamin C. It is the world’s most powerful source of natural Vitamin C, with one of the highest recorded concentrations. But, beyond its clinically proven potency, it is the quality of its molecular structure that is most significant.
Within the fruit, ascorbic acid is integrated into a network of polyphenols and organic acids that stabilize, transport, and amplify its activity. Notably, its high proportion of bioavailable ellagic acid enables immediate antioxidant and regenerative function—without reliance on conversion within the skin.
The result is not simply delivery, but continuity of exemplary efficacy.
A New Approach to Vitamin C
At LESSE, formulation begins with this understanding. Vitamin C is not approached as an isolate, but as part of an integrated system designed to work in alignment with the skin.
In the Essential Moisturizer, Australian Kakadu Plum is selected as a primary source of Vitamin C—supported by barrier-replenishing ceramides, deeply hydrating polysaccharides, and microbiome-conscious actives. Each component is chosen not in isolation, but for how it interacts within the whole.
The objective is to optimize compatibility—and efficacy without compromise.