Best Peptide Serum? 3,487 Reviews of The Ordinary, Biossance and COSRX
THE BEAUTY READ / FIND YOUR FIT
The decision, simplified.
Which peptide serum do reviewers rate? What 3,487 reviews of The Ordinary, Biossance and COSRX say about hydration, glow, stickiness and breakouts.
Published · Listings checked October 25, 2026
THE BEAUTY READ · REVIEW ANALYSIS
We read 3,487 customer reviews before writing this.
Sephora, theordinary.com, Ulta, Target and cosrx.com · October 25, 2026
| Retailer | Reviews read | Which ones | Read on |
|---|---|---|---|
| Sephora · The Ordinary Multi-Peptide + HA | 1,245 | every US English review except 412 marked incentivized or staff (Dec 21, 2017 to Aug 25, 2026) | October 25, 2026 |
| theordinary.com · The Ordinary Multi-Peptide + HA | 983 | every US English review except 243 marked incentivized (Mar 11, 2017 to Oct 24, 2026); 362 from free-product waves in June to August 2024 set aside | October 25, 2026 |
| Ulta · The Ordinary Multi-Peptide + HA | 103 | every distinct review Ulta's pages served, 103 of 106 shown (Oct 25, 2022 to Oct 18, 2026) | October 25, 2026 |
| Target · The Ordinary Multi-Peptide + HA | 19 | all 19 reviews (Nov 13, 2022 to Jun 3, 2026) | October 25, 2026 |
| Sephora · Biossance Squalane + Copper Peptide | 571 | every US English review except 97 marked incentivized or staff (Dec 7, 2021 to Oct 16, 2026) | October 25, 2026 |
| Ulta · COSRX The 6 Peptide Skin Booster | 280 | every distinct review Ulta's pages served, 280 of 5,343 shown (Jun 18, 2024 to Oct 17, 2026) | October 25, 2026 |
| cosrx.com · COSRX The 6 Peptide Skin Booster | 278 | every review outside an April to May 2024 bulk import of 14,509 and not marked incentivized (Aug 4, 2023 to May 18, 2026); 40 that also appear on Ulta counted once | October 25, 2026 |
| Target · COSRX The 6 Peptide Skin Booster | 8 | the 8 reviews written on Target (Jan 5, 2025 to Jul 13, 2026) | October 25, 2026 |
Where we read, how many and when
| Retailer | Sephora · The Ordinary Multi-Peptide + HA | theordinary.com · The Ordinary Multi-Peptide + HA |
|---|---|---|
| Reviews read | 1,245 | 983 |
| Which ones | every US English review except 412 marked incentivized or staff (Dec 21, 2017 to Aug 25, 2026) | every US English review except 243 marked incentivized (Mar 11, 2017 to Oct 24, 2026); 362 from free-product waves in June to August 2024 set aside |
| Read on | October 25, 2026 | October 25, 2026 |
| Retailer | Ulta · The Ordinary Multi-Peptide + HA | Target · The Ordinary Multi-Peptide + HA |
|---|---|---|
| Reviews read | 103 | 19 |
| Which ones | every distinct review Ulta's pages served, 103 of 106 shown (Oct 25, 2022 to Oct 18, 2026) | all 19 reviews (Nov 13, 2022 to Jun 3, 2026) |
| Read on | October 25, 2026 | October 25, 2026 |
| Retailer | Sephora · Biossance Squalane + Copper Peptide | Ulta · COSRX The 6 Peptide Skin Booster |
|---|---|---|
| Reviews read | 571 | 280 |
| Which ones | every US English review except 97 marked incentivized or staff (Dec 7, 2021 to Oct 16, 2026) | every distinct review Ulta's pages served, 280 of 5,343 shown (Jun 18, 2024 to Oct 17, 2026) |
| Read on | October 25, 2026 | October 25, 2026 |
| Retailer | cosrx.com · COSRX The 6 Peptide Skin Booster | Target · COSRX The 6 Peptide Skin Booster |
|---|---|---|
| Reviews read | 278 | 8 |
| Which ones | every review outside an April to May 2024 bulk import of 14,509 and not marked incentivized (Aug 4, 2023 to May 18, 2026); 40 that also appear on Ulta counted once | the 8 reviews written on Target (Jan 5, 2025 to Jul 13, 2026) |
| Read on | October 25, 2026 | October 25, 2026 |
How we sorted them: results reviewers say they saw or felt: firmer or plumper, softer fine lines, hydration, glow or brighter tone, smoother texture or smaller-looking pores; or no visible change; feel and comfort: absorbs and layers well, sticky, tacky or heavy, pilling, dryness, smell, packaging; breakouts or clogged pores, irritation or redness; gentle on sensitive skin; who and how: sensitive, oily or acne-prone, dry or mature skin stated; used with retinoids, vitamin C or acids; used four weeks or more; value and would buy again; one- and two-star share reported for context.
Left out of the count: reviews the retailer or brand marks as incentivized or written by staff (skipped unread), and on cosrx.com a bulk import dated April and May 2024 (skipped unread); reviews that say the product was free, a sample or from a review program, and whole months on a page when such a wave dominates; the same review posted on two sites, reviews about another product, about shipping only, from someone who had not used it, and reviews with no meaningful text (362 theordinary.com reviews from free-product waves in June to August 2024, 212 said it was free, a sample or from a review program, 41 the same review posted on two sites, 41 about another product, 28 not used yet, 14 about shipping only, 14 no meaningful text, 10 not in English, 4 repeated on the same page).
Usable reviews per peptide serum: The Ordinary Multi-Peptide + HA (1,906 usable); Biossance Squalane + Copper Peptide (408 usable); COSRX The 6 Peptide Skin Booster (447 usable)
WHO SHOULD SKIP IT
- Your skin breaks out easily. 165 The Ordinary reviewers (9%) reported breakouts or clogged pores, and 23 of 113 who said they have oily or acne-prone skin did; for Biossance and COSRX it was 5% and 4%.
- You hate a tacky finish. 13% of The Ordinary reviewers called it sticky or tacky, against 3% for Biossance and 2% for COSRX.
- You want visible change, not just comfort. 15% of Biossance and 10% of The Ordinary reviewers saw no difference (5% for COSRX), and results are self-reported, not measured.
MOST OFTEN PRAISED
- Hydrating Biossance 56%; COSRX 28%; The Ordinary 22%: skin felt moisturized, dewy or less dehydrated
- Plumper or firmer Biossance 29%; COSRX 13%; The Ordinary 12%: bouncier, tighter or more elastic-looking skin
- Glow or brighter tone COSRX 26%; The Ordinary 18%; Biossance 13%: more radiant, brighter or more even-looking
- Softer fine lines The Ordinary 12%; COSRX 9%; Biossance 5%: lines or wrinkles looked softer or smaller
MOST COMMON COMPLAINTS
- Saw no difference Biossance 15%; The Ordinary 10%; COSRX 5%: said it did nothing visible
- Sticky or tacky The Ordinary 13%; Biossance 3%; COSRX 2%: tacky, heavy or slimy feel
- Breakouts or clogged pores The Ordinary 9%; Biossance 5%; COSRX 4%: breakouts, bumps, milia or clogged pores
- Irritation or redness The Ordinary 6%; COSRX 6%; Biossance 2%: burning, stinging, itching, redness or a rash
Where reviews split: The Ordinary over time: of 1,404 usable reviews from 2017 to 2021, 52% described a visible or felt result; of 224 from 2024 on, 40%, while breakout or irritation reports rose from 12% to 19%.
Where reviews split: Biossance over time: of 362 usable reviews from 2021 to 2023, 75% described a visible or felt result; of only 46 from 2024 on, 43% did and 24% reported breakouts or irritation (28% gave one or two stars).
How reviewers used it: 392 The Ordinary, 38 Biossance and 48 COSRX reviewers say they used it four weeks or more; 94, 13 and 11 use it with a retinoid; 177, 28 and 36 say they have sensitive skin.
Feel, per reviewers: The Ordinary Multi-Peptide + HA (18% liked how it absorbs or layers); Biossance Squalane + Copper Peptide (47% liked how it absorbs or layers); COSRX The 6 Peptide Skin Booster (29% liked how it absorbs or layers)
SKINCARE · PRODUCT REVIEW
Most hydrating and plumping praise: Biossance Squalane + Copper Peptide (56% said it hydrated, 29% plumper or firmer; most reviews from 2021 to 2023). Most glow praise: COSRX The 6 Peptide Skin Booster (26% said skin looked brighter; 5% saw no difference). Most value praise: The Ordinary Multi-Peptide + HA (20%; also the most sticky complaints, 13%, and breakouts, 9%).
The Ordinary Multi-Peptide + HA, Biossance Squalane + Copper Peptide and COSRX The 6 Peptide Skin Booster | 3,487 customer reviews read on Sephora, theordinary.com, Ulta, cosrx.com and Target, October 25, 2026 · Listings checked October 25, 2026
As an Amazon Associate I earn from qualifying purchases. Links marked “paid link” go to Amazon and may earn us a commission at no extra cost to you. Offers and sellers can change.
Choose your starting point
The Ordinary Multi-Peptide + HA Serum, 1 fl oz
MOST VALUE PRAISE
Most value and fine-line praise
You want the multi-peptide serum with the most usable reviews in our count, and value matters to you.
The trade-off13% found it sticky; 9% reported breakouts.
Sold by Amazon.com at our check
October 25, 2026
Biossance Squalane + Copper Peptide Rapid Plumping Serum, 1.69 fl oz
MOST HYDRATING PRAISE
Most hydrating and plumping praise
You want hydration and a plumper look first.
The trade-off15% saw no difference; reviews from 2024 on are cooler.
Sold by Biossance at our check
October 25, 2026
COSRX The 6 Peptide Skin Booster Serum, 5.07 oz
MOST GLOW PRAISE
Most glow praise, fewest no-change reports
You want a light first step for glow and smoother texture (2% of reviewers called it sticky).
The trade-off6% reported irritation (same share as The Ordinary); most reviews are from 2024 on.
Sold by COSRX at our check
October 25, 2026
Find the fit for your routine.
A quick editorial read before the deeper review: start with your main concern, then check the evidence, routine fit and trade-offs below.
Quick verdict
Most hydrating and plumping praise: Biossance Squalane + Copper Peptide (56% said it hydrated, 29% plumper or firmer; most reviews from 2021 to 2023). Most glow praise: COSRX The 6 Peptide Skin Booster (26% said skin looked brighter; 5% saw no difference). Most value praise: The Ordinary Multi-Peptide + HA (20%; also the most sticky complaints, 13%, and breakouts, 9%).
Best for
Anyone choosing a first peptide serum who wants to know which one reviewers say hydrates, plumps or brightens, and which one reviewers more often called sticky, said broke them out or said did nothing.
Trade-off
Biossance's newer reviews are cooler: of 46 from 2024 on, 43% described a result and 24% reported breakouts or irritation. The Ordinary drew the most sticky and breakout complaints, and its 2024-on reviews described results less often (40% against 52% before 2022).
Think twice
Your skin breaks out easily: 9% of The Ordinary reviewers reported breakouts or clogged pores (4% to 5% for the other two). You hate a tacky finish: 13% found The Ordinary sticky. You want visible change, not just comfort: 15% of Biossance and 10% of The Ordinary reviewers saw no difference.
Decide what you want the serum to do. Biossance Squalane + Copper Peptide is the hydration and plumping pick in reviews, though most of them are a few years old and newer ones are cooler. COSRX The 6 Peptide Skin Booster is the light, glow-focused option, with the fewest reviewers saying it did nothing. The Ordinary Multi-Peptide + HA has the most usable reviews in our count and is the one reviewers call good value most often, but also the one most often called sticky.
THE COMPARISON / RESEARCH-LED
Side by side, without the noise.
Compare each option’s role and limitations before deciding what belongs in your routine.
The exact options we link: size, texture and seller
Three peptide serums. Details follow the Amazon listings; the review counts are ours.
| Product / Amazon link | Pick it for | Size · texture · seller | Choose it if | Watch out for | Option we link |
|---|---|---|---|---|---|
| The Ordinary Multi-Peptide + HA Serum, 1 fl oz View on Amazon · paid link ↗ | Most value praise | Multi-peptide serum with hyaluronic acid 1 fl oz · sold by Amazon.com | You want the multi-peptide serum with the most usable reviews in our count, and value matters to you. | 13% found it sticky; 9% reported breakouts. | This link opens the 1 fl oz bottle shipped and sold by Amazon.com. Seller at our check: Amazon.com |
| Biossance Squalane + Copper Peptide Rapid Plumping Serum, 1.69 fl oz View on Amazon · paid link ↗ | Most hydrating praise | Copper peptide serum with squalane and hyaluronic acid 1.69 fl oz · sold by Biossance | You want hydration and a plumper look first. | 15% saw no difference; reviews from 2024 on are cooler. | This link opens the 1.69 fl oz bottle sold by Biossance and shipped from Amazon. Seller at our check: Biossance |
| COSRX The 6 Peptide Skin Booster Serum, 5.07 oz View on Amazon · paid link ↗ | Most glow praise | Lightweight toner-like serum, six peptides 5.07 oz · sold by COSRX | You want a light first step for glow and smoother texture (2% of reviewers called it sticky). | 6% reported irritation (same share as The Ordinary); most reviews are from 2024 on. | This link opens the 5.07 oz bottle sold by COSRX and shipped from Amazon. Seller at our check: COSRX |
Size, texture, seller and the exact Amazon option · Links checked October 25, 2026
| Product / Amazon link | The Ordinary Multi-Peptide + HA Serum, 1 fl oz | Biossance Squalane + Copper Peptide Rapid Plumping Serum, 1.69 fl oz |
|---|---|---|
| Pick it for | Most value praise | Most hydrating praise |
| Size · texture · seller | Multi-peptide serum with hyaluronic acid 1 fl oz · sold by Amazon.com | Copper peptide serum with squalane and hyaluronic acid 1.69 fl oz · sold by Biossance |
| Choose it if | You want the multi-peptide serum with the most usable reviews in our count, and value matters to you. | You want hydration and a plumper look first. |
| Watch out for | 13% found it sticky; 9% reported breakouts. | 15% saw no difference; reviews from 2024 on are cooler. |
| Option we link | This link opens the 1 fl oz bottle shipped and sold by Amazon.com. Seller at our check: Amazon.com | This link opens the 1.69 fl oz bottle sold by Biossance and shipped from Amazon. Seller at our check: Biossance |
| View on Amazon ↗ (paid link) | View on Amazon ↗ (paid link) |
| Product / Amazon link | COSRX The 6 Peptide Skin Booster Serum, 5.07 oz |
|---|---|
| Pick it for | Most glow praise |
| Size · texture · seller | Lightweight toner-like serum, six peptides 5.07 oz · sold by COSRX |
| Choose it if | You want a light first step for glow and smoother texture (2% of reviewers called it sticky). |
| Watch out for | 6% reported irritation (same share as The Ordinary); most reviews are from 2024 on. |
| Option we link | This link opens the 5.07 oz bottle sold by COSRX and shipped from Amazon. Seller at our check: COSRX |
| View on Amazon ↗ (paid link) |
What changes from one option to the next?
Use this as the fast filter. The full review below explains the evidence, texture, routine fit and trade-offs behind the recommendation.
Anyone choosing a first peptide serum who wants to know which one reviewers say hydrates, plumps or brightens, and which one reviewers more often called sticky, said broke them out or said did nothing.
Three peptide serums: a multi-peptide serum with hyaluronic acid, a copper peptide serum with squalane and hyaluronic acid, and a lightweight serum with a toner-like texture and six peptides
Make sure it fits the routine you already have.
The most useful product is not the one with the loudest ingredient story. It is the one you can use consistently without creating unnecessary overlap.
Review-based guide: we read 3,487 customer reviews on Sephora, theordinary.com, Ulta, Target and cosrx.com (October 25, 2026) and tallied the patterns ourselves; product facts come from Amazon listings.
Biossance pairs the most hydrating (56%) and plumping (29%) praise; COSRX drew the most glow praise (26%) with the fewest no-change reports (5%); The Ordinary has the most usable reviews in our count (1,906, going back to 2017), with 20% calling it good value.
Biossance's newer reviews are cooler: of 46 from 2024 on, 43% described a result and 24% reported breakouts or irritation. The Ordinary drew the most sticky and breakout complaints, and its 2024-on reviews described results less often (40% against 52% before 2022).
As an Amazon Associate I earn from qualifying purchases. Product links marked “paid link” earn us a small commission at no extra cost to you. Commissions never decide which product we recommend. Offers and sellers change, so check the size and seller on the product page before you buy.
Review-analysis guide: 3,487 customer reviews read on Sephora, theordinary.com, Ulta, Target and cosrx.com (October 25, 2026), sorted and counted by us; product details from Amazon listings checked October 25, 2026.
By The Beauty Read · Checked October 25, 2026 · AI-assisted research and editing · Contains Amazon affiliate links
Which peptide serum is best depends on what you want it to do. In 2,761 usable reviews, Biossance Squalane + Copper Peptide (paid link) drew the most hydrating (56%) and plumping (29%) praise; COSRX The 6 Peptide Skin Booster (paid link) drew the most glow praise (26%) and the fewest no-change reports (5%); and The Ordinary Multi-Peptide + HA (paid link) drew the most value praise (20%) and the most sticky complaints (13%).
Best peptide serum: what 3,487 reviews agree on
Looking for the best peptide serum? We read 3,487 reviews of three popular picks at Sephora, Ulta, Target and the brands' own sites to see how often reviewers say their skin looked or felt different, and how often reviewers said a serum felt sticky, broke them out or did nothing: The Ordinary Multi-Peptide + HA Serum, Biossance Squalane + Copper Peptide Rapid Plumping Serum and COSRX The 6 Peptide Skin Booster Serum. All three listings name several peptides; Biossance and COSRX both list copper peptides, and The Ordinary pairs its peptides with hyaluronic acid. [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS] [A1] [A2] [A3]
Biossance drew the most hydrating praise (56% of 408 usable reviews) and the most plumping or firming praise (29%), though 15% saw no difference and most of its reviews are from 2021 to 2023. COSRX drew the most glow praise (26% of 447) and the fewest no-change reports (5%). The Ordinary, with by far the most usable reviews in our count (1,906), drew the most value praise (20%) and slightly more fine-line praise (12%), and also the most sticky (13%) and breakout (9%) complaints. [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS]
How we read 3,487 reviews at Sephora, Ulta, Target and two brand sites
We read every review each retailer served for these three products, with no fixed target, skipping those the site marks as incentivized or written by staff, plus the COSRX exceptions below. At Sephora that left 1,245 of 1,657 US English reviews for The Ordinary and 571 of 668 for Biossance. On theordinary.com we read 983 of 1,227, and on Target all 19. Ulta's pages served 103 of 106 reviews for The Ordinary and stop after about 300 for COSRX (280 of 5,343). [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS]
COSRX needed a closer look. Its own site shows 16,047 reviews and served 15,927 of them. Of those, 14,509 are dated April and May 2024 with midnight timestamps, almost none (14) flagged as verified buyers, up to 1,699 on a single day and some saying the product was complimentary, so we treated them as a bulk import and set them aside unread, along with 1,128 marked as earning loyalty points and 12 not in English. That left 278 we read. On Target, of the 10,369 COSRX reviews its pages served (26,303 shown), all but 8 were copied from COSRX's own reviews; we read those 8. [R-ULT-COS] [R-COS] [R-TGT-COS]
Of the 3,487 we read, 726 were set aside. From June to August 2024 most theordinary.com reviews said the product was free, so we dropped those months (362 reviews). Another 212 said the product was free, a sample or from a review program, 41 were the same review posted on two sites, which we counted once, and 111 were about another product, had not used it yet, were about shipping, had no real text, repeated on the page or were not in English. That leaves 2,761 usable reviews: 1,906 for The Ordinary (Sephora 1,220, theordinary.com 572, Ulta 97, Target 17), 408 for Biossance (Sephora) and 447 for COSRX (Ulta 234, cosrx.com 206, Target 7). [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS]
Some cautions. 74% of the usable The Ordinary reviews are from 2017 to 2021 and 89% of the Biossance reviews from 2021 to 2023, while most COSRX reviews are from 2024 on, so we show newer reviews separately below. Biossance comes from one retailer. Results here are what reviewers say they saw or felt, not measurements, and star ratings are not comparable across retailers. [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS]
The Ordinary Multi-Peptide + HA, the value pick
The Ordinary's listing says the serum targets early signs of aging and helps improve smoothness, elasticity and firmness, and names peptides including Matrixyl 3000 and ARGIRELOX alongside several forms of hyaluronic acid. Its safety notes say to avoid the eye area and not to use it on sensitive, peeling or compromised skin, and suggest a patch test. We link the 1 fl oz bottle shipped and sold by Amazon.com. [A1]
Across 1,906 usable reviews of The Ordinary multi peptide serum, 414 (22%) said it hydrated, 394 (21%) said skin felt smoother, 350 (18%) said it looked brighter or glowier and 230 (12%) said lines looked softer; 384 (20%) called it good value and 369 (19%) said they would buy it again. On the other side, 246 (13%) found it sticky or tacky, 198 (10%) saw no difference, 165 (9%) reported breakouts or clogged pores and 112 (6%) irritation. [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO]
Newer reviews are cooler. Of 1,404 usable reviews from 2017 to 2021, 52% described a visible or felt result; of 224 from 2024 on, 40% did, and breakout or irritation reports rose from 12% to 19%. Among 392 reviewers who said they used it four weeks or more, 80 (20%) said lines looked softer and 80 (20%) saw no difference. [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO]
See The Ordinary Multi-Peptide + HA Serum, 1 fl oz on Amazon (paid link) · This link opens the 1 fl oz bottle shipped and sold by Amazon.com.
Biossance Squalane + Copper Peptide, the hydration pick
Want a copper peptide serum? Biossance's listing describes a plumping complex of hyaluronic acid, polyglutamic acid and sugarcane-derived squalane with vegan copper peptides, paracress extract and ectoin, and claims instant and lasting hydration, visibly plumper, firmer skin and fewer visible fine lines. We link the 1.69 fl oz bottle sold by Biossance and shipped from Amazon. [A2]
In 408 usable Sephora reviews, 228 (56%) said it hydrated, 192 (47%) liked how it absorbs or layers, and 118 (29%) said skin looked plumper or firmer, the most of the three; only 22 (5%) mentioned softer lines. Complaints were few apart from 60 (15%) who saw no difference and 24 (6%) who found the price or size a real drawback; 20 (5%) reported breakouts and 10 (2%) irritation. We left out 160 of the 571 Sephora reviews we read because they said the product was free. [R-SEP-BIO]
Most of these reviews are from 2021 to 2023 (362 of 408), when 75% described a visible or felt result. Only 46 are from 2024 on; 43% of them did, 24% reported breakouts or irritation and 28% gave one or two stars, a small group but a cooler one. [R-SEP-BIO]
See Biossance Squalane + Copper Peptide Rapid Plumping Serum, 1.69 fl oz on Amazon (paid link) · This link opens the 1.69 fl oz bottle sold by Biossance and shipped from Amazon.
COSRX The 6 Peptide Skin Booster, the glow pick
If you want a Korean peptide serum, COSRX's listing calls this a skin booster with six peptides including copper peptides, a lightweight toner-like serum used as a first step after cleansing (2 to 3 pumps), with a moisturizer layered on top. We link the 5.07 oz bottle sold by COSRX and shipped from Amazon. [A3]
Among 447 usable reviews, 125 (28%) said it hydrated, 115 (26%) said skin looked brighter or glowier, the most of the three, and 112 (25%) said skin felt smoother; 56 (13%) said plumper or firmer. Just 21 (5%) saw no difference and 11 (2%) found it sticky. Irritation came up for 25 (6%) and breakouts for 20 (4%). [R-ULT-COS] [R-COS] [R-TGT-COS]
Most usable COSRX reviews are recent (394 of 447 from 2024 on), so they are not directly comparable with the older The Ordinary and Biossance reviews. Ulta and cosrx.com reviews told a similar story (52% and 54% described a visible or felt result). [R-ULT-COS] [R-COS] [R-TGT-COS]
See COSRX The 6 Peptide Skin Booster Serum, 5.07 oz on Amazon (paid link) · This link opens the 5.07 oz bottle sold by COSRX and shipped from Amazon.
Peptide serum for sensitive skin, and with retinol or vitamin C: how each felt to reviewers
Looking for a peptide serum for sensitive skin? Of 177 The Ordinary reviewers who said they have sensitive skin, 102 called it gentle and 37 reported breakouts or irritation; of 28 for Biossance, 19 and 3; of 36 for COSRX, 24 and 6. The Ordinary's own listing advises against use on sensitive, peeling or compromised skin. Among 113 The Ordinary reviewers with oily or acne-prone skin, 23 reported breakouts. [A1] [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS]
Using a peptide serum with retinol, or a peptide serum with vitamin C? Reviews cannot say what suits your skin, but we counted what reviewers who layer them reported. Of 94 The Ordinary reviewers who use it with a retinoid, 68 described a visible or felt result and 11 reported breakouts or irritation; of 124 who pair it with vitamin C, acids or another active serum, 85 and 6. COSRX's listing suggests pairing it with the brand's retinol cream, and Biossance and COSRX had too few such reviewers to compare (13 and 11 with retinoids). [A3] [R-SEP-TO] [R-TO] [R-ULT-TO] [R-TGT-TO] [R-SEP-BIO] [R-ULT-COS] [R-COS] [R-TGT-COS]
Keep reading
- Best retinol cream: Good Molecules, Drunk Elephant and The Ordinary
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Frequently asked questions
Which peptide serum came out on top in these reviews?
It depends on the goal. Biossance Squalane + Copper Peptide drew the most hydrating (56% of 408 usable reviews) and plumping (29%) praise. COSRX The 6 Peptide Skin Booster drew the most glow praise (26% of 447) and the fewest no-change reports (5%). The Ordinary Multi-Peptide + HA drew the most value praise (20% of 1,906) and the most sticky complaints (13%).
What is the best peptide serum for face hydration?
In these reviews, Biossance: 56% of its usable reviews said it hydrated, against 28% for COSRX and 22% for The Ordinary. Its listing pairs copper peptides with hyaluronic acid, polyglutamic acid and squalane.
Do peptide serums work?
Reviews cannot settle that. Half or more of usable reviews for each serum described a visible or felt result (50% for The Ordinary, 53% for COSRX, 72% for Biossance), while 5% to 15% said they saw no difference. These are self-reports, not measurements.
Which peptide serum is best for sensitive skin?
Among reviewers who said they have sensitive skin, 19 of 28 called Biossance gentle and 3 reported breakouts or irritation; for COSRX, 24 of 36 and 6; for The Ordinary, 102 of 177 and 37. The Ordinary's listing advises against use on sensitive, peeling or compromised skin.
Is a copper peptide serum different from a multi-peptide serum?
On these listings, Biossance and COSRX both include copper peptides, and The Ordinary lists a peptide blend (including Matrixyl 3000 and ARGIRELOX) with hyaluronic acid. In reviews, Biossance drew the most plumping praise (29%) and COSRX the most glow praise (26%), while The Ordinary drew slightly more fine-line praise (12%).
Is this the right choice for your routine?
Most hydrating and plumping praise: Biossance Squalane + Copper Peptide (56% said it hydrated, 29% plumper or firmer; most reviews from 2021 to 2023). Most glow praise: COSRX The 6 Peptide Skin Booster (26% said skin looked brighter; 5% saw no difference). Most value praise: The Ordinary Multi-Peptide + HA (20%; also the most sticky complaints, 13%, and breakouts, 9%).
Your skin breaks out easily: 9% of The Ordinary reviewers reported breakouts or clogged pores (4% to 5% for the other two). You hate a tacky finish: 13% found The Ordinary sticky. You want visible change, not just comfort: 15% of Biossance and 10% of The Ordinary reviewers saw no difference.
We separate brand claims from customer experiences. We check shopping links and disclose when a purchase may earn us a commission.
OUR SOURCES & HOW WE REVIEW
What we checked.
See where the information comes from and how we reached our take. Brand claims, customer experiences, and our interpretation are identified separately.
- Amazon: The Ordinary Multi-Peptide + Hyaluronic Acid Serum, 1 Fl Oz (paid link). Checked October 25, 2026 with a US delivery address: title, bullets, safety information, size (1 Fl Oz), seller (shipped and sold by Amazon.com).
- Amazon: Biossance Squalane + Copper Peptide Rapid Plumping Serum (paid link). Checked October 25, 2026 with a US delivery address: title, bullets, size selector (1.69 Fl Oz; a 0.4 fl oz travel size is a separate option), seller (Biossance, ships from Amazon).
- Amazon: COSRX 6X Peptide Collagen Skin Booster Toner Serum, 5.07 oz (paid link). Checked October 25, 2026 with a US delivery address: title, bullets including how to use, size (5.07 oz), seller (COSRX, ships from Amazon).
- Sephora: customer reviews page for The Ordinary Multi-Peptide + HA. 1,245 reviews read on October 25, 2026 (every US English review except 412 marked incentivized or staff (Dec 21, 2017 to Aug 25, 2026)). Tallied by THE BEAUTY READ.
- theordinary.com: customer reviews page for The Ordinary Multi-Peptide + HA. 983 reviews read on October 25, 2026 (every US English review except 243 marked incentivized (Mar 11, 2017 to Oct 24, 2026); 362 from free-product waves in June to August 2024 set aside). Tallied by THE BEAUTY READ.
- Ulta: customer reviews page for The Ordinary Multi-Peptide + HA. 103 reviews read on October 25, 2026 (every distinct review Ulta's pages served, 103 of 106 shown (Oct 25, 2022 to Oct 18, 2026)). Tallied by THE BEAUTY READ.
- Target: customer reviews page for The Ordinary Multi-Peptide + HA. 19 reviews read on October 25, 2026 (all 19 reviews (Nov 13, 2022 to Jun 3, 2026)). Tallied by THE BEAUTY READ.
- Sephora: customer reviews page for Biossance Squalane + Copper Peptide. 571 reviews read on October 25, 2026 (every US English review except 97 marked incentivized or staff (Dec 7, 2021 to Oct 16, 2026)). Tallied by THE BEAUTY READ.
- Ulta: customer reviews page for COSRX The 6 Peptide Skin Booster. 280 reviews read on October 25, 2026 (every distinct review Ulta's pages served, 280 of 5,343 shown (Jun 18, 2024 to Oct 17, 2026)). Tallied by THE BEAUTY READ.
- cosrx.com: customer reviews page for COSRX The 6 Peptide Skin Booster. 278 reviews read on October 25, 2026 (every review outside an April to May 2024 bulk import of 14,509 and not marked incentivized (Aug 4, 2023 to May 18, 2026); 40 that also appear on Ulta counted once). Tallied by THE BEAUTY READ.
- Target: customer reviews page for COSRX The 6 Peptide Skin Booster. 8 reviews read on October 25, 2026 (the 8 reviews written on Target (Jan 5, 2025 to Jul 13, 2026)). Tallied by THE BEAUTY READ.
About this guide: we did not test these products ourselves. Shares come from the customer reviews we read, not from every review on each site, and describe other people's experiences; the picks follow those patterns and are not a ranking. No review text is reproduced, and Amazon reviews, ratings and prices are not used.
Retailer prices, review totals and product information can change. This article is not medical advice.
