MEDIHEAL Collagen Firming Volume Serum with Retinol 40ml
MEDIHEAL Collagen Firming Volume Serum with Retinol 40ml is a serum that names Retinol on its own ingredient panel, sourced as the Korean-market formula.
No reviews yet- Ships from our California warehouse
- Duties prepaid
- Suited to
- Sensitive skinNormal skinDry skin
- Helps with
- A formula built around SqualaneA treatment serum stepA layered Korean routine
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- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
How it works
Retinol is named on the ingredient panel on this serum. Retinol is the alcohol form of vitamin A and the strongest retinoid available without a prescription. Skin converts it in two steps to retinoic acid, and it is used at night, at low percentages, for the look of fine lines and rough texture. It can leave skin flaking while it acclimatises. On this panel it sits alongside Niacinamide, Hydrolyzed Extensin and Sodium Dilauramidoglutamide Lysine. 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.
Key benefits
- Retinol named on this product's own ingredient panel
- Niacinamide on the same panel, the formula's active
- Hydrolyzed Extensin on the same panel, the formula's protein
- 40 ml to a unit
- Korean GS1 barcode matched against a Korea sourcing supplier's record for this item
Key actives
Retinol
Retinol is the alcohol form of vitamin A and the strongest retinoid available without a prescription. Skin converts it in two steps to retinoic acid, and it is used at night, at low percentages, for the look of fine lines and rough texture. It can leave skin flaking while it acclimatises.
Niacinamide
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.
Hydrolyzed Extensin
Extensin is a structural glycoprotein from plant cell walls. Hydrolysed, it is cut into fragments small enough to dissolve, and it works as a water-holding film on the surface.
Sodium Dilauramidoglutamide Lysine
An amino-acid-based lipid built from glutamic acid and lysine. It behaves like the lipids between skin cells and forms a liquid-crystal structure that holds water in.
What does Squalane do in this serum?
Squalane sits among the first ingredients on the list. It is a lightweight, non-greasy emollient, and this early a placement means it is doing real work cushioning the formula, not trailing off the list.
Is Niacinamide also in this formula?
Niacinamide sits within the first ten ingredients, the tone-evening, barrier-supporting active Korean formulas lean on most often, and its early position here means it is not a token dose. It sits alongside Squalane on MEDIHEAL's ingredient list for this product.
How is this serum used in a routine?
Apply a few drops to cleansed skin and pat in gently before moisturiser. It works as a treatment step layered under moisturiser.
Who is this serum suited for?
Sensitive skin, Normal skin are the best fit for this serum. Patch test on the inner arm before first full use, as with any new skincare product.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
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 - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
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.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, 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.
Payment and security
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How to use
- Start on two nights a week and build up slowly over a month rather than starting nightly.
- Apply after toner on dry skin, pressing three or four drops across the face.
- Follow with a moisturiser, which makes a retinol routine considerably more comfortable.
- Do not use it on the same night as an exfoliating acid, since stacking is what turns a routine sore.
Worth knowing
- Patch test on the inner arm before first full use, as with any new skincare product.
Reviews
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Korean-market original
MEDIHEAL's Collagen Firming Volume Serum with Retinol 40ml, 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.
Match the batch code on the box against the code printed on the bottle or tube itself; the two are stamped separately and should agree.
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.
Vitamin A has a molecular structure that's tiny enough to get into the lower layers of your skin, where it finds and boosts collagen and elastin, which is a protein that strengthens your skin's flexibility.
Wilma Bergfeld, 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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