The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F

Number of Ingredients

More ingredients can mean more potential irritants, but a long list is not automatically worse.

This product: 7 ingredients

Price per Ounce

This compares similar product types using the price and size listed in Airtable.

This product: $19.80 per ounce

Dermatologist’s verdict

Recommended

The Ordinary Ascorbyl Tetraisopalmitate Solution 20% is the gentle way into vitamin C, and The Ordinary says so itself, pointing experienced users to L-ascorbic acid. THD ascorbate does not sting, but it has to convert in the skin and that evidence is weaker. Do not read 20% as 20% pure vitamin C.

What it is

The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F is a fragrance-free vitamin C serum that comes as a clear oil rather than a watery liquid, about $20 to $22. It is an antioxidant step and nothing more — it will not unclog a pore, exfoliate or replace a moisturizer.

The active is tetrahexyldecyl ascorbate, an oil-soluble vitamin C that skin has to convert before it can use it. It is carried in coconut alkanes, squalane and jojoba oil, with ethyl linoleate, one of the essential fatty acids The Ordinary calls Vitamin F. Hence the oil feel, the slow sink, and no sting.

What it does

Vitamin C does two jobs in skin. It gives up an electron to free radicals, the unstable molecules ultraviolet light creates, which limits the damage that ages skin. It is also required by the enzymes that build collagen. Both jobs need vitamin C in its active form, ascorbic acid.

The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F does not contain ascorbic acid. It contains tetrahexyldecyl ascorbate, the same vitamin with an oily tail attached, which is what makes it stable and gentle. Enzymes in the skin have to cut that tail off first, and the evidence for that conversion is much weaker than for L-ascorbic acid.

So read the 20% as 20% of a different molecule, not 20% vitamin C. In exchange you get a serum that does not sting, does not turn orange in the bottle, and costs about $20. The Ordinary says as much itself, and points experienced users toward L-ascorbic acid.

What it treats

## Dry Skin (Xerosis) | Good fit Dry skin is short of the surface fats that stop water leaving, so a watery serum can flash off and take moisture with it. This one arrives in squalane and jojoba oil, so the antioxidant step is also the last oily layer.

## Sensitive Skin | Good fit Pure L-ascorbic acid needs a low pH to stay stable, and that acidity is what stings. Tetrahexyldecyl ascorbate does not, so this is the one to try if vitamin C has burned you.

## Sun Damage (Photoaging) | Limited Ultraviolet light knocks electrons loose inside skin cells, and those free radicals damage collagen. Vitamin C hands over the missing electron and stops the chain. It works alongside sunscreen, never instead of it.

## Damaged Skin Barrier | Good fit Ethyl linoleate is an essential fatty acid, a raw material skin uses to rebuild the glue between its surface cells. Flaking, raw skin takes an oil like this better than a water-based serum.

Best for

**The evidence is weaker than pure vitamin C:** it is a derivative. The conversion to usable vitamin C in skin is the assumption the product rests on, and that evidence is much weaker than for L-ascorbic acid.

**May not suit oily or acne-prone skin:** the oil format will not suit oily or acne-prone skin.

**May conflict with niacinamide:** The Ordinary flags a conflict with niacinamide in their own guidance.

**The 20% figure is easy to misread:** do not read "20%" as 20% pure vitamin C. Not the same molecule.

Texture

Oil A thin, clear oil that spreads much further than a few drops look like they should.

It sinks in slowly and leaves a soft shine. On dry skin that reads as comfort; on oily skin it reads as greasy, which is why it does not suit everybody.

It is fragrance free and does not sting. Makeup over it can slide, so give it a few minutes.

How to use it

## How to use it How much: A few drops, as one of the last steps. Oils spread over water-based products, not under them. Layering: The Ordinary flags a conflict with niacinamide in its own guidance, so use the two at different times. Careful: Vitamin C is not sun protection. It reduces the damage ultraviolet light causes; it does not block the light. Sunscreen still goes on top. What to expect: Nothing dramatic, because antioxidant benefit shows up as damage that does not happen. Give brightening three months. If nothing has changed, L-ascorbic acid is the better-evidenced next step.

Full ingredient list

Coconut Alkanes, Tetrahexyldecyl Ascorbate, Ethyl Linoleate, Coco-Caprylate/Caprate, Simmondsia Chinensis Seed Oil, Solanum Lycopersicum Fruit Extract, Squalane

The rest of the line

AXIS: Gentlest, no sting | Strongest, most likely to irritate

The Ordinary sells vitamin C in several forms. The form decides how strong it feels and how well skin tolerates it; the price barely moves.

**Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F (this one)** — An oil-soluble derivative in a light oil base. No grit, no low pH, almost no sting.

**Ascorbyl Glucoside Solution 12%** — A water-based derivative your skin has to convert. Mild and slow.

**Vitamin C Suspension 23% + HA Spheres 2% | the-ordinary-vitamin-c-suspension-23-percent-plus-ha-spheres-2-percent** — Pure ascorbic acid in a gritty base. Stronger than either derivative, and the one most people find scratchy.

Similar products

These are the options if you want the pure form, or a texture that suits oily skin. On this ingredient, this is the price to beat.

Vanicream Vitamin C Serum | same | Also THD ascorbate at 5%, in a light gel rather than an oil, with ceramides and an airless pump. Lower dose, better for oily skin. Timeless Vitamin C | same | 10% L-ascorbic acid with vitamin E and ferulic acid — the better-evidenced form, and the sensible next step if this does nothing in three months. Sunday Riley CEO 15% Vitamin C Brightening Serum | less | The same derivative at 15% for about $85, in a dropper that lets air in, with citrus oils and glycolic acid.

Key facts

Key active: THD ascorbate 20% Texture: Lightweight oil Best for: Dry or sensitive skin; vitamin C beginners Approximate price: $20–$22 Fragrance: Fragrance free Size: 1.01 oz Price: $20.50 Type: Serum

Questions patients ask

Is The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F as strong as L-ascorbic acid? No. A gentle derivative that must convert in the skin, with weaker evidence.

Is The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F good for oily skin? Less so. The oil base suits dry or sensitive skin.

Can I use The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F with niacinamide? The Ordinary flags a possible conflict, so use them separately.

Is The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F fragrance-free? Yes.

Where does The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F go in my routine? Near the end, since it is oil-based.

References

1. Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F | The Ordinary (https://theordinary.com/en-us/ascorbyl-tetraisopalmitate-solution-20-in-vitamin-f-vitamin-c-100416.html) — Manufacturer page confirming the 20% ascorbyl tetraisopalmitate formulation, its ~$20 (US$20.50) price, its hydrating oil-based positioning, and that The Ordinary frames derivatives as suited to newer users while offering direct L-ascorbic acid for others. 2. Double-blind, half-face study comparing topical vitamin C and vehicle for rejuvenation of photodamage. (https://pubmed.ncbi.nlm.nih.gov/11896774/) — Clinical trial showing an oil-soluble vitamin C (tetrahexyldecyl ascorbate) formulation produced statistically significant improvement in photodamage and new collagen without inflammation, backing the derivative's efficacy and low-irritation profile. 3. Benefits of combinations of vitamin A, C and E derivatives in the stability of cosmetic formulations. (https://www.mdpi.com/1420-3049/17/2/2219) — Confirms ascorbyl tetraisopalmitate is a chemically stable, fat/oil-soluble vitamin C ester derivative used in cosmetic formulations, supporting the page's description of an oil-soluble vitamin C derivative. 4. Photostability and efficacy studies of topical formulations containing UV-filters combination and vitamins A, C and E. (https://pubmed.ncbi.nlm.nih.gov/17614223/) — Study of ascorbyl tetraisopalmitate topical formulations reporting hydration and anti-aging (cell-renewal) effects and reduced skin irritation, supporting the derivative's benefits-with-less-irritation claim. 5. An Open Label Clinical Trial of a Multi-Ingredient Anti-Aging Moisturizer Designed to Improve the Appearance of Facial Skin. (https://pubmed.ncbi.nlm.nih.gov/26151786/) — Clinical trial of a moisturizer containing THD ascorbate that showed significant improvement in fine lines, tone and brightness while being mild and well tolerated, supporting efficacy and low-irritation claims for the vitamin C derivative.