Isntree Hyper Retinol EX 1.0 Serum
Hyper Retinol EX 1.0 Serum is Isntree's concentrated serum, formulated for dullness and an uneven-looking tone. Built around Niacinamide and Bakuchiol, it is aimed at rough texture without the sensitivity a stronger vitamin A ingredient can bring and rough texture and visible fine lines.
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- Suited to
- SensitiveDryNormalCombination
- Helps with
- Dullness and an uneven-looking toneRough texture without the sensitivity a stronger vitamin A ingredient can bringRough texture and visible fine linesPost-exfoliation sensitivity
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How it works
Hyper Retinol EX 1.0 Serum is Isntree's concentrated serum (20ml). Niacinamide sits in the formula as the brightening and barrier workhorse of the routine, the same B3 vitamin dermo-cosmetic protocols reach for when a complexion looks dull, blotchy or prone to visible redness after cleansing. Bakuchiol is a plant-derived vitamin A alternative formulated for skin that wants a texture-renewing routine without the dryness a stronger resurfacing ingredient can bring, and it layers easily alongside other actives. The concentrated texture sinks in without a greasy residue, leaving skin feeling smoothed and hydrated without a sticky after-feel. It sits in a Korean routine as the treatment step, best layered after essence and before a moisturizer.
Key benefits
- Niacinamide for brightening, barrier-supporting
- Bakuchiol for gentle vitamin A alternative
- Retinol for vitamin A derivative
- Concentrated texture built for a treatment step
- Authentic Korean-market formula, sourced as the same version sold on Korean retail shelves
- Layers cleanly after essence and before a moisturizer
Key actives
Niacinamidebrightening, barrier-supporting
Niacinamide sits in the formula as the brightening and barrier workhorse of the routine, the same B3 vitamin dermo-cosmetic protocols reach for when a complexion looks dull, blotchy or prone to visible redness after cleansing.
Bakuchiolgentle vitamin A alternative
Bakuchiol is a plant-derived vitamin A alternative formulated for skin that wants a texture-renewing routine without the dryness a stronger resurfacing ingredient can bring, and it layers easily alongside other actives.
Retinolvitamin A derivative
Retinol is the vitamin A derivative behind most Korean anti-aging serums, added here for night-time use once a routine is ready to work on fine lines and rough, uneven texture.
Allantoinsoothing agent
Allantoin is a gentle, well-studied soothing agent included to keep freshly cleansed or freshly exfoliated skin from feeling raw or tight while the rest of the formula gets to work.
Panthenolbarrier-softening
Panthenol is pro-vitamin B5, included to keep the skin barrier feeling supple and to soften the rough, flaky patches that show up on dry or wind-chapped skin during a Korean skincare routine's colder months.
What is the Hyper Retinol EX 1.0 Serum?
Hyper Retinol EX 1.0 Serum is Isntree's concentrated serum (20ml), formulated as treatment step in a Korean skincare routine. It suits sensitive, dry, normal skin types, and it is sourced here as the authentic Korean-market formula rather than a US-shelf reformulation.
How should I use the Hyper Retinol EX 1.0 Serum?
Smooth two to three drops over cleansed and toned skin morning and evening, patting gently until absorbed before a moisturizer. Working it in this order keeps the concentrated texture behaving the way Isntree formulated it to, rather than rushing straight to the next step in the routine.
How often should I use this serum?
Morning and evening, or evening only for a stronger treatment active, worked in gradually if skin is new to it. Consistency across a full skin cycle of several weeks matters far more than an occasional use for a serum like this one, since most of its benefit shows up with steady, repeated application.
Who is this serum best suited for?
This serum is best suited for sensitive, dry, normal, combination skin, particularly anyone dealing with dullness and an uneven-looking tone. Patch test first if skin is very reactive, even though this ingredient is gentler than a true retinoid.
What are the key ingredients in this serum?
The formula lists Niacinamide, Bakuchiol and Retinol among its ingredients, alongside the rest of the base that carries them across the skin. Each one is named here in the exact form it appears on Isntree's own ingredient list, not inferred from the product name.
- 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
- Use the Hyper Retinol EX 1.0 Serum after toner and before moisturizer, in the evening.
- Take 2 to 3 drops on the palm of your hands and gently pat it on your skin for maximum absorption. Apply the serum at night, after cleansing on a dry skin, before your moisturizer. For sensitive skin, test with a small amount before using it on your face.
- Toner first so the surface is damp, then this, then about a minute before your moisturizer goes over the top.
- Twice a day, every day. Do not stack it with a second serum of the same kind; two hydrating serums in one routine do the work of one.
Worth knowing
- Patch test first if skin is very reactive, even though this ingredient is gentler than a true retinoid.
- Use at night only and introduce two or three nights a week before moving to nightly use.
- Patch test on the inner arm before a first full-face application if skin tends to react easily.
- Store away from direct sunlight and high heat to keep the texture and scent stable over time.
Reviews
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Korean-market original
Shop Hyper Retinol EX 1.0 Serum (20ml), the authentic Korean-market serum from Isntree formulated with Niacinamide, sourced for the Korean market rather than a US-shelf reformulation.
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.
Bakuchiol is often used as a gentler alternative to retinol. It may help your skin look smoother and reduce the appearance of wrinkles.
Shilpi Khetarpal, MDDermatologist, Cleveland Clinic 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
1 more professional perspective
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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