Ascorbyl Tetraisopalmitate: Comedogenic Rating & Ingredient Analysis
Ascorbyl tetraisopalmitate, sometimes labelled VC-IP or ATIP, is a stable, oil-soluble vitamin C derivative closely related to tetrahexyldecyl ascorbate. Like that ingredient, it wraps the vitamin C molecule in fatty chains to make it lipid-loving, stable and non-irritating, so it can be used in luxurious oil and cream textures without the sting of L-ascorbic acid. It is a common choice in Japanese and Korean anti-aging serums, where it is valued for penetrating the skin's lipid layers and for its role in brightening and supporting collagen. Because it is fat-soluble and comfortable, it suits dry, mature and even sensitive skin.
Quick facts
- Comedogenic rating
- our estimate — not measured
- Irritation risk
- Low
- Effective pH
- —
- Typical strength
- 1–3%
- Pregnancy
- Considered safe
- Suits skin types
- drynormalmaturesensitivecombination
Where this number comes from
No one has published a comedogenic rating for this ingredient. Fulton's 1989 table tested about 250 raw materials and this was not among them, and we found no later study measuring it. The figure shown is our own reasoning from the ingredient's chemistry and how it is used — treat it as an estimate, not a measurement.
Fulton read his own scale as 0-1 not significant, 2-3 borderline, 4-5 positive. The assay is the rabbit ear at 10% dilution, which the paper itself calls extremely sensitive and not fully predictive of human skin. Ratings describe the raw ingredient; concentration and formulation change real-world behaviour.
Caution profile
The four published fields on this page, on one 0–5 scale. Further from the centre means more care is needed — never that the ingredient is worse.
Derived, not measured: pore-clogging is the published comedogenic rating; irritation maps low/moderate/high to 1/3/5; pregnancy maps safe/caution/avoid to 0/3/5; skin-type limits is how many of the seven skin types this entry does NOT list. Every input is printed in words in the quick-facts card above.
Show the numbers
| Metric | 0–5 | Published field |
|---|---|---|
| Pore-clogging | 1 | 1/5 |
| Irritation | 1 | Low |
| Skin-type limits | 1.4 | 5/7 |
| Pregnancy | 0 | Considered safe |
Working pH and typical strength
Where this ingredient is formulated to sit, and at what concentration.
Both bars come from the fields above: the pH window and the typical strength range published for this ingredient. The tinted column is healthy skin's surface pH (about 4.7–5.75).
Show the numbers
| Metric | 0–5 |
|---|---|
| Typical strength | 1–3% |
What is it?
Ascorbyl tetraisopalmitate is L-ascorbic acid modified with four isopalmitate (fatty) groups. This heavy lipid coating makes it exceptionally stable and oil-soluble, so it stays intact in anhydrous formulas and mixes easily with facial oils and balms. Skin enzymes are thought to release active vitamin C from it after it penetrates, and laboratory studies suggest good uptake into the skin thanks to its lipophilic nature. As with other esters, precise real-world potency is harder to pin down than for L-ascorbic acid, and it is usually used at modest concentrations of 1–3%. Its appeal lies in combining vitamin C benefits with a comfortable, non-acidic, oil-friendly delivery.
Benefits
Stable, oil-soluble vitamin C
Its fatty coating keeps ascorbyl tetraisopalmitate stable and lets it blend into oils and balms, delivering vitamin C in comfortable, non-stinging textures ideal for dry skin.
Penetrates the lipid layers
Being lipophilic, it associates with the skin's own lipids and is absorbed well in lab studies, offering a route to vitamin C for those who dislike watery, acidic serums.
Brightening and even tone
By supplying vitamin C, it helps reduce dullness and uneven pigmentation over time, contributing to a brighter, more radiant complexion with consistent use.
Supports collagen and defence
Vitamin C is vital for collagen synthesis and neutralises free radicals, so ascorbyl tetraisopalmitate supports firmer skin and adds antioxidant protection under sunscreen.
How to use
Use a product with ascorbyl tetraisopalmitate once daily, typically in the morning, applied to clean skin before richer creams and sunscreen; its oil-friendly texture layers smoothly. Concentrations are usually modest at 1–3%, and it is often blended with other antioxidants like vitamin E and ferulic acid, or paired with tetrahexyldecyl ascorbate for a fuller oil-soluble vitamin C effect. It does not require the slow ramp-up retinoids need. Store it away from strong heat and light, though its stability means it holds up well. Daytime use complements sunscreen but is not a substitute for it.
Side effects
Ascorbyl tetraisopalmitate is gentle and rarely stings, since it lacks the acidity of pure vitamin C. Because it is oil-based, very oily or congestion-prone skin might find rich formulas heavy, though its comedogenic rating is low. Allergic reactions are uncommon. As always, a short patch test on a new product for several days helps confirm that your skin gets along with the whole formula.
Who should avoid it
Most people, including those with sensitive and dry skin, tolerate ascorbyl tetraisopalmitate well. Very oily, acne-prone skin should be mindful of heavy oil textures. Anyone allergic to vitamin C derivatives should avoid it, and those wanting the most heavily researched high-strength vitamin C may still choose L-ascorbic acid. It is considered pregnancy-safe.
Pairs well with
Frequently asked questions
What is VC-IP in skincare?
VC-IP is a common trade name for ascorbyl tetraisopalmitate, a stable, oil-soluble vitamin C derivative used for brightening and anti-aging in serums and oils, especially in Asian skincare.
Is ascorbyl tetraisopalmitate effective?
It supplies vitamin C in a stable, well-absorbed oil-soluble form and supports brightening and antioxidant defence, though exact potency versus L-ascorbic acid is less firmly established.
Is it good for sensitive or dry skin?
Yes. Its non-acidic, oil-soluble nature makes it comfortable on dry, mature and sensitive skin that finds watery, acidic vitamin C serums drying or irritating.
Can I combine it with vitamin E?
Yes. Vitamin E and ferulic acid pair naturally with oil-soluble vitamin C esters, reinforcing the antioxidant network and helping keep the formula stable.
Is ascorbyl tetraisopalmitate safe in pregnancy?
Topical vitamin C derivatives like ascorbyl tetraisopalmitate are generally considered safe during pregnancy and breastfeeding. Since VC-IP usually arrives inside an oil or balm alongside several other ingredients, run the full label past your doctor rather than this one ester.
Sources & further reading
- PubChem — Nikkol VC-IP (Ascorbyl Tetraisopalmitate, CID 10260680)
- European Commission CosIng database — Ascorbyl Tetraisopalmitate
- Sunscreens and Cosmetic Formulations Containing Ascorbyl Tetraisopalmitate and Rice Peptides for the Improvement of Skin Photoaging: A Double-blind, Randomized Placebo-controlled Clinical Study (PubMed)
Medical disclaimer
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