5 Best Korean Peptide Serums (2026), by Olive Young Sales
Five peptide serums picked by rule from Olive Young Korea's skincare sales rankings of 6 Sep, 1 Oct and 13 Oct 2026 and its serum sales list of 14 Oct, with Hwahae ratings of 14 Oct 2026. All five are Korean brands.
5 products compared · Korean data as of Olive Young Korea 13 Oct 2026 · Olive Young Korea 14 Oct 2026 · Hwahae 14 Oct 2026
Start with COSRX's The 6 Peptide Skin Booster Serum if you want the peptide serum Koreans buy most: #67 on 6 Sep and #60 on 13 Oct 2026 in Olive Young Korea's skincare ranking. Its Korean list puts six peptides 7th to 12th, right after niacinamide.
Three of the five rest on one serum sales list of 14 Oct 2026 only, and we did not test these serums on skin.
medicube Zero Pore One Day Peptide Serum · best for: Peptides plus exfoliating acidsIts refill set sat 51st on Olive Young Korea's serum sales list, 14 Oct 2026.
COSRX Blue Peptide Bakuchiol Serum · best for: Copper peptide with bakuchiol97th of 144 serums by sales at Olive Young Korea on 14 Oct 2026.
How we picked · Research-based — not personally tested · Korean data as of Olive Young Korea 13 Oct 2026 · Olive Young Korea 14 Oct 2026 · Hwahae 14 Oct 2026 · How we research →
The 5 picks, one by one
Korean data used on the cards:Skincare rank = Olive Young Korea — skincare rank (Olive Young Korea, 13 Oct 2026) · Sales position = Olive Young Korea — essences & serums by sales (position) (Olive Young Korea, 14 Oct 2026) · Hwahae rating (reviews) (Hwahae, 14 Oct 2026)
Not confirmed to be the same formula as the Korean version (as of 14 Oct 2026): Amazon US, YesStyle
1
COSRX The 6 Peptide Skin Booster Serum
best for: Most readers, our data pick
Korean figures:Skincare rank: #60 (13 Oct) · — (1 Oct) · #67 (6 Sep)(Olive Young Korea, 13 Oct 2026) · Sales position: #45(Olive Young Korea, 14 Oct 2026)
COSRX
The 6 Peptide Skin Booster Serum
150 ml
COSRX's The 6 Peptide Skin Booster Serum leads our order: #67 in Olive Young Korea's skincare ranking on 6 Sep 2026 and #60 on 13 Oct, both times as a two-bottle 150 ml set. Its Korean notice lists six peptides from 7th to 12th, at 5 ppm or less each, with niacinamide 6th and a run of amino acids after them. Hwahae gives it 4.64 from 4,478 reviews (14 Oct 2026), the highest score and the largest base of these five.
Good for
You want the peptide serum with the most Korean reviews behind it
A watery first step after cleansing that you can layer, per the Korean directions
Skip it if
You want a small bottle to try first: Korea sells it in 150 ml
Watch out: COSRX suggests using it within 6 months of opening, short for a 150 ml bottle. The Amazon US listing shows key ingredients only, so we could not compare the full list.
Korean figures:Skincare rank: #54 (13 Oct) · — (1 Oct) · #96 (6 Sep)(Olive Young Korea, 13 Oct 2026) · Sales position: #78(Olive Young Korea, 14 Oct 2026)
Biodance
Pore Perfecting Collagen Peptide Serum
30 ml
Biodance's Collagen Peptide Serum ranked twice: #96 in Olive Young Korea's skincare ranking on 6 Sep 2026 and #54 on 13 Oct, as a refill set and then a two-bottle set. Its Korean list starts with collagen water and ends with ten peptides, 40th to 49th. The Amazon US listing we link, sold by Biodance, shows the same ingredients in the same order.
Good for
You order from the US and want the Korean ingredient list confirmed
Skip it if
You want peptides high on the list: all ten come last
Watch out: Hwahae shows 4.27 from just 66 reviews on 14 Oct 2026. Its median rank, 96, rests on a September ranking near the bottom of the Top 100.
Texture: Pump bottle.
Images: Biodance Olive Young product page
See price on Amazon · Amazon US
Not confirmed to be the same formula as the Korean version (as of 14 Oct 2026): YesStyle
Korean figures:Sales position: #43(Olive Young Korea, 14 Oct 2026) · Hwahae rating: 4.20 (69)(Hwahae, 14 Oct 2026)
SUNGBOON EDITOR
Silk Peptide EGF Heart-Fit Volume Lifting Ampoule
40 ml
SUNGBOON EDITOR's Silk Peptide EGF Ampoule placed highest of the three serums that missed the skincare rankings: #43 on Olive Young Korea's serum sales list on 14 Oct 2026. Its long Korean notice opens with silk water and lists 30 peptide entries from 19th down. You draw it out of the bottle with the syringe that comes in the box, per the Korean directions.
Good for
You want a long list with many peptides and silk water first
You shop at Olive Young in Seoul
Skip it if
You want a short ingredient list
Watch out: No partner store sells this ampoule in the US yet, so the card has no buy button. Hwahae shows 4.20 from 69 reviews (14 Oct 2026), the lowest score here.
Texture: Gel with gold threads, dosed with a syringe.
Label caution: The Korean notice says to rinse with water if the particles get into the eyes.
Images: SUNGBOON EDITOR Olive Young product page
Stores not checked · US: we have not checked stores there, so we can't say whether it is sold.
Korean figures:Sales position: #51(Olive Young Korea, 14 Oct 2026) · Hwahae rating: 4.56 (1,016)(Hwahae, 14 Oct 2026)
medicube
Zero Pore One Day Peptide Serum
30 ml
medicube's One Day Peptide Serum is #51 on Olive Young Korea's serum sales list of 14 Oct 2026, as a bottle-plus-refill set. Read its Korean notice before you buy: lactic, glycolic and salicylic acids and gluconolactone sit well above its ten peptides, which come 41st to 60th at parts-per-billion levels.
Good for
You already use acid serums and want one with peptides on the list
Skip it if
Children aged 3 and under: the Korean notice rules it out
Skin that reacts to AHA or BHA
Watch out: The Korean notice asks for sunscreen alongside it, because it contains AHA. The Amazon US listing shows no ingredient list, so it was not compared.
Texture: Watery serum in a dropper bottle.
Label caution: The Korean notice says this serum contains AHA, which can make skin more sensitive to the sun: use sunscreen with it, try it on a small area first, and do not use it on children aged 3 and under.
Korean figures:Sales position: #97(Olive Young Korea, 14 Oct 2026) · Hwahae rating: 4.56 (217)(Hwahae, 14 Oct 2026)
COSRX
The Blue Peptide Bakuchiol Plump Glow Serum
50 ml
COSRX's Blue Peptide Bakuchiol Serum takes the last place on our rule: #97 on Olive Young Korea's serum sales list of 14 Oct 2026. Its Korean notice states copper tripeptide-1 at 0.5 percent, 11th, and bakuchiol at 0.25 percent, 14th, with five more peptides in parts per million. Ethanol sits 16th on that list.
Good for
You want a stated amount of copper peptide on the label
Skip it if
You avoid alcohol in serums: ethanol is 16th on the list
Watch out: Its sales position is the lowest of the five. The Amazon US listing shows key ingredients only, so we could not compare the full list.
Korean data in this table:Skincare rank = Olive Young Korea — skincare rank (Olive Young Korea, 13 Oct 2026) · Sales position = Olive Young Korea — essences & serums by sales (position) (Olive Young Korea, 14 Oct 2026) · Hwahae rating (reviews) (Hwahae, 14 Oct 2026)
From the Korean ingredient notices at Olive Young Korea (14 Oct 2026); position = place on that list; not an effect claim.
How we picked
Pool: every serum, ampoule or essence whose Korean product name says peptide (Olive Young category: essence/serum/ampoule; promo brackets ignored) in Olive Young Korea's skincare sales ranking Top 100 on 6 Sep, 1 Oct and 13 Oct 2026, plus the 144 best-selling items in that category on 14 Oct 2026. Every pick's Korean ingredient notice lists at least five peptides.
Left out: listings that bundle several different serums, and medicube's PDRN Pink Peptide Serum, already picked on our PDRN serum list. Mists, creams and eye products with peptides are other categories.
Order: how many of the three Olive Young Korea skincare rankings each serum appears in, then its median rank (missing = 101), then its place in the essence/serum/ampoule sales list on 14 Oct. Price and commission play no part.
2 of the 5 products with an Olive Young Korea rank reached it through a promotional listing (influencer pick, Olive Young pick, collab or sale).
Ranked products that came from a gift-set or bonus listing (an extra item or a second unit in the pack): 3 of 5 — a rank can partly reflect the deal.
We have not tried these on skin, so the picks lean only on the Korean data shown here.
For most US readers, COSRX's The 6 Peptide Skin Booster Serum is the pick.
It is one of only two serums here that made Olive Young Korea's skincare Top 100 (6 Sep and 13 Oct 2026), and Hwahae gives it 4.64 from 4,478 reviews (14 Oct 2026), the highest score from the largest base. The Amazon US listing we link is sold by COSRX.
Which peptide serum do Koreans buy the most right now?
COSRX's The 6 Peptide Skin Booster Serum, by our rule. It placed #67 on 6 Sep and #60 on 13 Oct 2026 in Olive Young Korea's skincare ranking, and Biodance's serum placed #96 and #54. No other peptide serum made those rankings, so the last three picks come from the serum sales list of 14 Oct 2026.
Is the COSRX 6 Peptide Skin Booster worth it?
Yes, if Korean reviews matter to you: Hwahae shows 4.64 from 4,478 reviews on 14 Oct 2026, the highest score here. The catch is size, since Korea sells it in 150 ml and COSRX suggests finishing it within 6 months of opening.
Which peptide serum is right for my skin?
Start from the ingredient lists, since we did not test these on skin. medicube's serum contains AHA and BHA, so skip it if acids bother you. COSRX's Blue Peptide serum lists ethanol and bakuchiol, and SUNGBOON EDITOR's ampoule has a long list, so a short-list fan may prefer COSRX's 6 Peptide serum.
How much peptide is in these serums?
Very little, by the Korean notices that state an amount. COSRX's 6 Peptide serum gives 5 ppm or less per peptide, and medicube's gives parts per billion. COSRX's Blue Peptide serum is the exception, stating copper tripeptide-1 at 0.5 percent.
Why is medicube's PDRN Pink Peptide Serum not on this list?
medicube's PDRN Pink Peptide serum is on another list of ours. It ranked #11 and #31 in Olive Young Korea's skincare Top 100 on 6 Sep and 1 Oct 2026, and we already picked it for our PDRN serum list. We do not repeat a pick across lists built from the same rankings.
More questionsIs the peptide serum on Amazon US the same as in Korea?
Biodance's is, as far as the list goes. Its Amazon US listing showed the same ingredients in the same order as Olive Young Korea's notice on 14 Oct 2026. The COSRX and medicube Amazon US pages show the same bottles but no full ingredient list, so we could not compare them.
Can I use a peptide serum with an acid serum?
medicube's serum already combines them: its Korean list has lactic, glycolic and salicylic acids alongside ten peptides. The Korean notice asks for sunscreen with it and a test on a small area first. If you add a separate acid product, add one new product at a time.
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