This lipophilic Vitamin C derivative offers exceptional stability and deep dermal penetration without the irritation typically associated with pure Ascorbic Acid. By utilizing a tetra-isopalmitate ester structure, it effectively promotes collagen synthesis and inhibits melanogenesis even at neutral pH levels.
- INCI Name:
- Ascorbyl Tetraisopalmitate
- Chemical/Scientific Name:
- L-Ascorbic acid, 2,3,5,6-tetrakis(2-hexyldecanoate)
- Common Aliases:
- VC-IP, Tetra-isopalmitoyl Ascorbic Acid
| Category: | Antioxidants |
| Source Origin: | Synthetic (derived from Ascorbic Acid and isopalmitic acid) |
| Comedogenic Rating: | 0–1 |
| Primary Industries: | Cosmetic, Dermatological |
| Solubility: | Oil (Lipophilic) |
At a Glance: Properties & Effects
| Anti-Aging/Renewal | |
| Brightening/Tone | |
| Formula Stability | |
| Irritation Risk |
- Primary Benefits: Superior oxidative stability, transdermal absorption, stimulation of collagen production, and significant reduction in UV-induced cell damage.
- Potential Risks: Minimal; rare instances of contact dermatitis in extremely sensitive individuals.
Biological Action & Cosmetic Profile
Intracellular conversion remains the primary mechanism for this molecule’s biological activity. Once absorbed into the skin, enzymes cleave the fatty acid chains to release free Ascorbic Acid. This process ensures a sustained delivery of Vitamin C to the dermis, where it acts as a cofactor for lysyl and prolyl hydroxylase, enzymes essential for collagen fiber cross-linking. Unlike water-soluble forms, the lipid-soluble nature of this ingredient allows it to bypass the stratum corneum barrier more efficiently, reaching deeper layers where it can exert its regenerative effects.
Melanogenesis inhibition occurs through the suppression of tyrosinase activity. Research indicates that this ester prevents the oxidation of dopa to dopaquinone, effectively lightening existing hyperpigmentation and preventing new age spots. Furthermore, its antioxidant capacity extends to protecting cellular lipids. By neutralizing reactive oxygen species (ROS) generated by UV exposure, it prevents lipid peroxidation and protects the integrity of the cellular membrane.
Formulation stability is a hallmark of this derivative. While pure Ascorbic Acid oxidizes rapidly in the presence of air, light, or water, the tetraisopalmitate structure remains stable for up to 12 months in standard cosmetic vehicles. It does not require the low pH (typically below 3.5) that characterizes traditional Vitamin C serums, making it compatible with a wider range of skin types and active ingredients.
Broader Applications & Origins
Laboratories synthesize this ingredient by esterifying Ascorbic Acid with a branched-chain fatty acid. This chemical modification specifically addresses the two primary flaws of L-ascorbic acid: instability and poor skin permeability. While it is chemically similar to Tetrahexyldecyl Ascorbate, manufacturers often use these terms interchangeably in the industry, though slight structural variations may exist depending on the fatty acid source.
Routine Integration
- Synergies: Exhibits enhanced photoprotection when paired with Tocopherol and Ferulic Acid. It also integrates seamlessly with Squalane or Caprylic Capric Triglyceride for improved emolliency.
- Conflicts: No major chemical conflicts, though it should be used cautiously alongside high-strength Retinol if the skin barrier is compromised.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel and SCCS data support the safety of this ingredient in concentrations typically ranging from 0.5% to 10%, though some professional formulations utilize higher percentages. Clinical trials consistently demonstrate that it is non-sensitizing and non-irritating, even for patients with rosacea or dermatitis who cannot tolerate acidic Vitamin C preparations. Because it does not exfoliate the skin or require a low pH, it is considered a safe option for both morning and evening application.
Is Ascorbyl Tetraisopalmitate as effective as L-ascorbic acid?
While L-ascorbic acid is more biologically active immediately upon application, this derivative is more effective at reaching the deeper dermis. Its high stability ensures that the product remains potent throughout its shelf life, whereas pure Vitamin C often loses efficacy through oxidation before it can be fully utilized by the skin.
Can this ingredient cause breakouts?
This ester has a very low comedogenic rating. However, because it is oil-soluble and typically delivered in an oil-based carrier like Caprylic Capric Triglyceride, individuals with extremely oily or acne-prone skin should monitor their skin’s reaction to the specific base oils used in the formulation.
How should I store products containing this ingredient?
Although it is significantly more stable than other forms of Vitamin C, storing it in a cool, dark place is still recommended. Protecting it from direct sunlight and extreme heat will further prolong the integrity of the fatty acid esters and ensure maximum antioxidant performance.