MEDIHEAL
Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P
MEDIHEAL Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P is a formula that names Sodium Ascorbyl Phosphate on its own ingredient panel, sourced as the Korean-market formula.
No reviews yet- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal skinDry or dehydrated skinCombination skin
- Helps with
- A routine stepA layered Korean routine
In stock. Arrives in 3 to 7 business days
We accept
You’re $100.00 away from free US shipping.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
Key benefits
- Sodium Ascorbyl Phosphate named on this product's own ingredient panel
- Niacinamide on the same panel, the formula's active
- Tartaric Acid on the same panel, the formula's exfoliant
- Korean-market formula, with its Korean barcode and batch code intact on the box
Key actives
6Niacinamide
Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.
13Tartaric Acid
Tartaric Acid is the fruit acid of grapes and tamarind. It is an AHA, but it is used more often to adjust pH and bind metal ions than as the main exfoliant.
16Adenosine
Adenosine is a nucleoside that Korea's own cosmetic authority recognises as a wrinkle-care functional ingredient, which is why it appears on so many Korean lists at a low level. It is used for the look of fine lines and is stable and well tolerated.
26Sodium Ascorbyl Phosphate
Sodium Ascorbyl Phosphate is a water-soluble, stable vitamin C salt. It works at near-neutral pH, so it appears in formulas aimed at skin that pure ascorbic acid leaves stinging.
Inside the formula
Inside the formula
- 6Niacinamide
- 13Tartaric Acid
- 16Adenosine
- 26Sodium Ascorbyl
Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.
![MEDIHEAL Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P](https://cdn.shopify.com/s/files/1/0951/0780/9595/files/product_images_1764580025.768898564761067_14361650831783197406_2af5b2ea-f2e0-4dfc-ab1f-0817b93c343d.jpg?v=1789020132)
How is this skincare formula used in a routine?
Apply to cleansed skin as directed and follow with the next step of a routine. It works as a routine step suited to the format of the product.
Is this the same formula sold in Korea?
Yes. MEDIHEAL's Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P is sold here as the Korean-market formula, the same version carried in Korea, with intact Korean-market packaging and batch coding, not a US-shelf reformulation.
Who is this skincare formula suited for?
Normal skin, Dry or dehydrated skin are the best fit for this skincare formula. Patch test on the inner arm before first full use, as with any new skincare product.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (35): Water, Glycerin, Dipropylene Glycol, Polyacrylic Acid, Agar, Niacinamide, Sodium Polyacrylate, Hydroxyacetophenone, Xanthan Gum, Caprylyl Glycol, Cellulose Gum, Disodium EDTA, Tartaric Acid, Cetyl Ethylhexanoate, Caprylyl/Capryl Glucoside, Adenosine, Melaleuca Alternifolia (Tea Tree) Leaf Oil, Lactobacillus Ferment, Melaleuca Alternifolia (Tea Tree) Leaf Water, Aluminum Glycinate, 4-Terpineol, 1,2-Hexanediol, Butylene Glycol, Dipotassium Glycyrrhizate, Melaleuca Alternifolia (Tea Tree) Extract, Sodium Ascorbyl Phosphate, Glutathione, Hydrolyzed Collagen, Sodium Hyaluronate, Potassium Hyaluronate, Sodium Hyaluronate Crosspolymer, Hydrolyzed Sodium Hyaluronate, Phenoxyethanol, Hyaluronic Acid, Sodium Acetylated Hyaluronate
Ingredient list read from medihealshop.com on 30 August 2026.
33 of 35 explained
- Water solvent
- Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Dipropylene Glycol humectant
- Dipropylene Glycol is a glycol used as a solvent and a light humectant. Its main job is keeping the rest of the formula dissolved and the texture fluid rather than adding hydration of its own.
- Agar thickener
- Agar is a seaweed polysaccharide that sets into a firm gel. It is the gelling agent behind jelly masks and thick sleeping packs.
- Niacinamide active
- Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.
- Sodium Polyacrylate thickener
- Sodium Polyacrylate is a polymer that absorbs many times its weight in water. It thickens a formula and holds water in a gel against the skin.
- Hydroxyacetophenone preservative booster
- Hydroxyacetophenone is an antioxidant that also strengthens a preservative system, so a formula needs less traditional preservative. Korean formulas pair it with 1,2-hexanediol constantly.
- Xanthan Gum thickener
- Xanthan Gum is a polysaccharide made by fermenting sugar. It thickens a watery formula into a gel and holds the whole thing in suspension so nothing separates. Too much of it and a serum turns stringy, which is why it appears in fractions of a percent.
- Caprylyl Glycol preservative booster
- Caprylyl Glycol is a glycol that conditions skin and, more importantly, strengthens a preservative system so less of the traditional preservative is needed. It appears in most modern formulas built without parabens.
- Cellulose Gum thickener
- Cellulose Gum is plant cellulose modified to dissolve in water. It thickens, holds particles in suspension and gives a smooth, slippery body.
- Disodium EDTA chelator
- EDTA is a chelator: it locks up trace metal ions from water and packaging that would otherwise turn a formula cloudy, off-colour or rancid. It does nothing to skin and appears at a fraction of a percent.
- Tartaric Acid exfoliant
- Tartaric Acid is the fruit acid of grapes and tamarind. It is an AHA, but it is used more often to adjust pH and bind metal ions than as the main exfoliant.
21 more explained
- Cetyl Ethylhexanoate emollient
- Cetyl Ethylhexanoate is a synthetic ester used as a dry-feeling emollient. It spreads easily, leaves a silky rather than oily finish, and helps disperse pigments and UV filters evenly.
- Caprylyl/Capryl Glucoside surfactant
- Caprylyl/Capryl Glucoside is a sugar-derived cleansing surfactant. It foams modestly and is mild enough for low-pH cleansers built for reactive skin.
- Adenosine active
- Adenosine is a nucleoside that Korea's own cosmetic authority recognises as a wrinkle-care functional ingredient, which is why it appears on so many Korean lists at a low level. It is used for the look of fine lines and is stable and well tolerated.
- Melaleuca Alternifolia (Tea Tree) Leaf Oil fragrance component
- Tea Tree Leaf Oil is an essential oil from an Australian shrub, carrying terpinen-4-ol. Korean formulas use it in products aimed at blemish-prone skin; it is potent, aromatic, and one of the essential oils most likely to bother reactive skin.
- Lactobacillus Ferment ferment
- Lactobacillus Ferment is the liquid left after lactobacillus bacteria have fermented a plant or milk substrate. It carries the small molecules the fermentation produced, including lactic acid and amino acids, and is used for the look of dull, uneven skin.
- Melaleuca Alternifolia (Tea Tree) Leaf Water plant extract
- Tea Tree Leaf Water is the distillate, used in place of plain water as a base. It carries a trace of the plant's aroma and none of the essential oil's strength.
- 4-Terpineol fragrance component
- A terpene alcohol, and the main constituent of tea tree oil. On a label it is an aromatic plant constituent rather than a functional ingredient.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- Dipotassium Glycyrrhizate active
- Dipotassium Glycyrrhizate is a water-soluble salt derived from licorice root. It is the licorice fraction Korean formulas use for the look of redness, and it is far more stable in water than the whole extract.
- Melaleuca Alternifolia (Tea Tree) Extract plant extract
- Tea Tree Leaf Extract is the water-based extract rather than the essential oil, so it is far milder and much less aromatic. It is used in formulas for blemish-prone skin.
- Sodium Ascorbyl Phosphate antioxidant
- Sodium Ascorbyl Phosphate is a water-soluble, stable vitamin C salt. It works at near-neutral pH, so it appears in formulas aimed at skin that pure ascorbic acid leaves stinging.
- Glutathione antioxidant
- Glutathione is a small peptide the body uses as one of its main antioxidants. In skincare it is used as an antioxidant and for the look of dullness; it is unstable in water, so formulas that carry it are usually built around protecting it.
- Hydrolyzed Collagen protein
- Hydrolyzed Collagen is collagen broken into fragments small enough to dissolve in water. It cannot become collagen in skin; what it does is hold water at the surface and leave a smooth, conditioned film.
- Sodium Hyaluronate humectant
- Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.
- Potassium Hyaluronate humectant
- Potassium Hyaluronate is another salt of hyaluronic acid, used for the same reason as the sodium form: it dissolves easily and holds a large amount of water in the outer layer of skin.
- Sodium Hyaluronate Crosspolymer humectant
- Sodium Hyaluronate Crosspolymer is hyaluronic acid linked into a mesh. It holds water in a soft gel on the surface rather than sinking in, and it releases that water slowly through the day.
- Hydrolyzed Sodium Hyaluronate humectant
- Hydrolyzed Hyaluronic Acid is hyaluronic acid cut into much shorter fragments. The smaller the fragment, the further into the outer layer it can settle, which is why serums stack several sizes together instead of using one.
- Phenoxyethanol preservative
- Phenoxyethanol is the most widely used cosmetic preservative outside the paraben family. It keeps a water-containing formula from growing bacteria and mould, and is capped at one percent in most markets, so it always sits low on a list.
- Hyaluronic Acid humectant
- Hyaluronic Acid is a sugar chain the body already makes, and one gram of it can hold several litres of water. In a formula it is a humectant that pulls water to the surface of skin and holds it in a film, which is what makes skin look plumper while it is there.
- Sodium Acetylated Hyaluronate humectant
- Sodium Acetylated Hyaluronate is hyaluronic acid modified to be part oil-loving, so it clings to skin instead of rinsing away. Formulators call it the one that stays put.
- Market
- Korean market, the version sold in Korea
- Made in
- Republic of Korea
- Category
- Sun Care
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
How it works
Sodium Ascorbyl Phosphate is named on the ingredient panel on this formula. Sodium Ascorbyl Phosphate is a water-soluble, stable vitamin C salt. It works at near-neutral pH, so it appears in formulas aimed at skin that pure ascorbic acid leaves stinging. On this panel it sits alongside Niacinamide, Tartaric Acid and Adenosine. Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.
How to use
- Apply to cleansed skin as directed and follow with the next step of a routine.
Worth knowing
- Patch test on the inner arm before first full use, as with any new skincare product.
Complete the routine
- This itemMEDIHEAL Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P$20.00
- The treatment step of this routineMEDIHEAL Tea Tree Calming Barrier Ampoule 50ml$37.50
- Cleanse first, so the next step meets bare skinMEDIHEAL Teatree Trouble Calming Cleanser 120ml$15.00
Total for 3 items$72.50
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MEDIHEAL Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P
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MEDIHEAL, Korean-market original
MEDIHEAL's Vitamin C UV Cut Outdoor Sun Patch [Triple Protection] 4P, sourced for the Korean market.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about the key actives in this formula, quoted from the medical sources linked beside each.
Using topical vitamin C can result in less cell damage and better-looking skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Niacinamide helps reduce the appearance of pores in a few ways. By strengthening the skin barrier and improving elasticity, pores appear less noticeable and more even.
Ashlyn YankeAesthetician, Cleveland Clinic
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