NINELESS B-Boost 1% Kojic Acid Serum
NINELESS B-Boost 1% Kojic Acid Serum is a serum (30 ml) formulated with Niacinamide, a tone- and texture-focused brightening active.
No reviews yet- Ships from our California warehouse
- Duties prepaid
- Suited to
- NormalCombinationDull or uneven-tone skinSensitive
- Helps with
- Skin looking for a tone- and texture-focused brightening activeSkin looking for a calming, irritation-easing ingredientA serum step in a Korean-style routineShoppers who want NINELESS's Korean-market formula rather than a US-reformulated version
Sold out.
Tell us where to send it
One email, the moment this exact unit is back in stock. Not a newsletter and not a sequence, and your address comes off the list the second it is sent.
- Duties prepaid
- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
How it works
NINELESS B-Boost 1% Kojic Acid Serum is a serum sold in NINELESS's Korean-market packaging and format. Niacinamide is listed 2nd of 36 ingredients, an early, prominent position on the list, carrying this formula's brightening and tone-evening work. Panthenol is listed 5th of 36 ingredients, an early, prominent position on the list, carrying the calming work this formula leans on for skin that reacts easily. Tranexamic Acid is listed 6th of 36 ingredients, an early, prominent position on the list, carrying this formula's brightening and tone-evening work. Kojic Acid and Ascorbyl Glucoside are also present on the list, in a supporting amount alongside the ingredients above. It takes the step after toner and before moisturizer of a Korean-style layering routine, used after toner, am and/or pm.
Key benefits
- Niacinamide sits right near the top of the 36-ingredient list, a tone-evening ingredient that works on visible unevenness and surface texture
- Glycerin sits right near the top of the 36-ingredient list, a foundational humectant that draws in and holds surface moisture
- Panthenol sits right near the top of the 36-ingredient list, a soothing, moisture-holding ingredient that supports comfort right after use
- Tranexamic Acid sits right near the top of the 36-ingredient list, tranexamic acid, a brightening ingredient positioned for an even, clear-looking tone
- Formulated as a serum or ampoule from NINELESS, sized for regular use in a routine
- Comes in a 30ml format, sized for a treatment step layered after toner or essence
Key actives
Niacinamide
Niacinamide is listed 2nd of 36 ingredients, an early, prominent position on the list, carrying this formula's brightening and tone-evening work.
Panthenol
Panthenol is listed 5th of 36 ingredients, an early, prominent position on the list, carrying the calming work this formula leans on for skin that reacts easily.
Tranexamic Acid
Tranexamic Acid is listed 6th of 36 ingredients, an early, prominent position on the list, carrying this formula's brightening and tone-evening work.
Kojic Acid
Kojic Acid is listed 9th of 36 ingredients, an early, prominent position on the list, carrying this formula's brightening and tone-evening work.
Ascorbyl Glucoside
Ascorbyl Glucoside is listed 11th of 36 ingredients, a supporting position further down the list, carrying this formula's brightening and tone-evening work.
What is NINELESS B-Boost 1% Kojic Acid Serum for?
It is a serum in NINELESS's Korean-market lineup, built around Niacinamide (2nd of 36 ingredients). After toner, AM and/or PM. Press or smooth over the face and let it settle before the next step. What ships is the same Korean-market formula and packaging NINELESS sells at home, not a US-reformulated version.
Where does this go in a routine, and how do I use it?
After toner, AM and/or PM. Press or smooth over the face and let it settle before the next step. It takes the step after toner and before moisturizer of a Korean-style layering routine. Give it a minute to settle before adding the next product on top.
Does B-Boost 1% Kojic Acid Serum contain Niacinamide?
Yes, Niacinamide is listed 2nd of 36 ingredients on the panel, an early, prominent position. It is a tone- and texture-focused brightening active in this formula, working alongside the other ingredients on the panel.
Is this the authentic Korean-market version, not a US retail reformulation?
Yes. What we ship is NINELESS's Korean-market formula and packaging, sourced for the Korean market rather than a US-facing reformulation. The intact Korean barcode and batch code on the box are part of that proof.
Who is this product best suited for?
Normal, Combination, Dull or uneven-tone skin and Sensitive skin types are the best fit, based on the actives on its ingredient panel. Patch test first, as with any new addition to a routine.
- 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
We accept
How to use
- Use the B-Boost 1% Kojic Acid Serum after toner and before moisturizer, morning and evening.
- Apply a small amount on skin and gently massage until fully absorbed. Apply adequate moisturizer and sunscreen next morning. Keep the serum in the refrigerator.
- 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 on the inner arm 24 hours before adding this to your face or scalp, as with any new product.
- Introduce it gradually alongside the rest of your routine rather than adding several new actives at once.
Reviews
No reviews yet. Tell us how much you love the product!
Write Reviews (opens in a new tab)We’re on gram!
Creators trying on authentic Korean skincare routines and products from us.
Rating a shelf of Dr. Althea products one by one.
Jasmine Loo · YouTube
Two hydrating serums side by side, IUNIK and Dr. Althea.
Kristin · YouTube
A walk through the Dr. Althea serum lineup and who each one suits.
auraofmahmuda · YouTube
A blunt first take on the Dr. Althea range.
Lexi Chang · YouTube
A first look at the viral 345 Relief Cream before buying.
Shelley Nayak · YouTube
A first try of the Dr. Althea serum on camera.
Hannah Ziad · YouTube
Korean-market original
NINELESS B-Boost 1% Kojic Acid Serum, serum or ampoule with Niacinamide, 30ml, Korean-market formula.
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.
Pantothenol is a common ingredient in skin care and hair products I recommend, particularly for people who are prone to dryness.
Taylor Bullock, MDDermatology resident, Cleveland Clinic Topical tranexamic acid 5% cream is under investigation in the treatment of melasma and is showing promising results in the treatment of epidermal-type melasma.
Faisal R AliConsultant Dermatologist, DermNet NZ
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
Ask an AI assistant about this product
Ask an AI assistant about this product
Opens ChatGPT, Perplexity or Claude in a new tab with the question prefilled. Claude asks you to sign in first.