UKLASH Serum Review:Original (ICP) vs Complex Peptide — Which to Choose in 2026?
Bottom Line Up Front
UKLASH's decision to offer both an ICP formula and a new PGA-free Complex Peptide is telling — it signals the brand knows prostaglandin regulations are tightening. If you're a UKLASH user, switch from the Original to the Complex Peptide. If you want the strongest independent clinical evidence for lash growth without any PGA concerns, Toplash's triple-peptide formula (+52.3% length at 8 weeks, independent trial) is the more evidence-backed choice at a similar or lower price.
UKLASH 2026: Two Serums, Two Safety Profiles
UKLASH now sells two distinct lash serum formulas. Understanding which you're buying is critical, because the regulatory and safety picture is completely different for each:
🔵 Original Eyelash Growth Serum
ASIN: B07QSVTVRD
Key Active: ICP (prostaglandin)
Peptides: BTP-1 + MP-17 (2 peptides)
SCCS Status: ⚠ ICP flagged unsafe
Canada: Not available
Price: ~$52 / 3mL (~$17.33/mL)
🟢 Complex Peptide Serum
ASIN: B0DJDMKF2B
Key Active: 6 Peptides (PGA-free)
Peptides: Pea, Hexapeptide-8, Copper, Dipeptide, 2× Palmitoyl
SCCS Status: ✓ Compliant
Canada: Available
Formula: 99% natural origin
Quick Specs — Original Serum
ICP
Key active — SCCS/1680/25 flagged
$17.33
Cost per mL ($52 / 3mL)
4–6 wks
Typical first results timeline
BTP-1 + MP-17
Two growth peptides alongside ICP
3 mL
3-month supply size
❌ Canada
Not available — ICP banned 2019
What Is UKLASH?
UKLASH is a British lash serum brand founded in 2018 by Nima Pourian. Despite being UK-based, it has rapidly expanded internationally and markets itself as the "world's #1 rated lash serum" — a claim based on aggregated review volumes across international markets. The brand offers a 100% money-back guarantee if visible results are not achieved after 12 weeks of consistent use.
The Original Serum's formula is notable for combining ICP (the prostaglandin active) with two of the same growth peptides found in Toplash's formula: Biotinoyl Tripeptide-1 (BTP-1) and Myristoyl Pentapeptide-17 (MP-17). This dual-mechanism approach means the Original Serum is delivering both prostaglandin receptor stimulation AND peptide-based follicle signalling — making it one of the most comprehensively formulated ICP serums.
The launch of the Complex Peptide Serum in 2024 demonstrates UKLASH's awareness of the shifting regulatory environment. Rather than reformulating the Original, they created a separate PGA-free product — allowing both product lines to coexist while catering to safety-conscious consumers.
⚠️ UKLASH Original: SCCS/1680/25 Alert — February 2, 2026
The UKLASH Original Eyelash Growth Serum contains ICP (isopropyl cloprostenate). On February 2, 2026, the EU Scientific Committee on Consumer Safety (SCCS/1680/25) concluded ICP "cannot be considered safe for use in cosmetics" intended for eyelash and eyebrow growth.
Health Canada prohibited ICP in cosmetics in 2019. UKLASH Original is not available to Canadian customers. The product remains legally available in the UK and US as of mid-2026, pending EU regulatory action following the SCCS opinion.
✅ UKLASH Complex Peptide: SCCS Compliant — No PGA Concerns
The UKLASH Complex Peptide Eyelash Serum does not contain ICP, DDDE, or MDN. It is fully compliant with SCCS/1680/25, available in Canada and the EU, and free from the regulatory concerns affecting the Original formula. If you are choosing between the two UKLASH products, this is the safer option in 2026.
Original Serum — Full INCI Breakdown
The UKLASH Original Serum's INCI reveals a thoughtful formula that combines ICP with a strong peptide and botanical support layer:
| # | INCI Name | Common Name | Role | Classification |
|---|---|---|---|---|
| 1 | Aqua | Water | Solvent, base | Base |
| 2 | Glycerin | — | Humectant | Base |
| 3 | Butylene Glycol / Propanediol / 1,2-Hexanediol | Glycols | Humectants, penetration aids | Base |
| 4 | Biotinoyl Tripeptide-1 | BTP-1 | Follicle anchoring, growth peptide | Growth Peptide |
| 5 | Camellia Sinensis Leaf Extract | Green Tea | Antioxidant protection | Botanical |
| 6 | Caprylyl Glycol | — | Preservative booster, emollient | Base |
| 7 | Centella Asiatica Extract | Gotu Kola | Wound healing, anti-inflammatory | Botanical |
| 8 | Chamomilla Recutita Flower Extract | Chamomile | Soothing, anti-irritation | Botanical |
| 9 | Ethylhexylglycerin | — | Preservative booster | Preservative |
| 10 | Glycyrrhiza Glabra Root Extract | Licorice Root | Anti-inflammatory, brightening | Botanical |
| 11 | Isopropyl Cloprostenate | ICP | Primary growth active — prostaglandin FP-receptor agonist | ⚠ PGA Active |
| 12 | Myristoyl Pentapeptide-17 | MP-17 | Keratin gene expression, lash growth stimulation | Growth Peptide |
| 13 | Panthenol | Pro-Vitamin B5 | Lash conditioning, moisture | Conditioning |
| 14 | Polygonum Cuspidatum Root Extract | Japanese Knotweed | Resveratrol-rich antioxidant | Botanical |
| 15 | Rosmarinus Officinalis Leaf Extract | Rosemary | Antioxidant, circulation support | Botanical |
| 16 | Scutellaria Baicalensis Root Extract | Chinese Skullcap | Anti-inflammatory, antioxidant | Botanical |
| 17 | Tocopherol | Vitamin E | Antioxidant, skin protection | Antioxidant |
| 18 | Xanthan Gum | — | Natural thickener, texture | Base |
| 19 | Benzoic Acid / Phenoxyethanol / Sodium Benzoate | Preservative system | Antimicrobial stability | Preservative |
Key formulation observation: The UKLASH Original is one of the most peptide-rich ICP serums reviewed. The inclusion of both BTP-1 and MP-17 — two of Toplash's three active peptides — means the formula provides genuine peptide support alongside the prostaglandin active. If ICP were removed and BTP-1/MP-17 concentrations were increased (plus AT-3 added), it would approach a full triple-peptide formula. The Complex Peptide serum attempts this direction without ICP.
Complex Peptide Serum — Six Peptides Explained
The UKLASH Complex Peptide Serum (white bottle) is marketed as "record-breaking six peptides" — all PGA-free. Here's what each peptide does:
- Pisum Sativum (Pea) Peptide — plant-derived, stimulates follicle activity and improves lash density via signal peptide mechanism
- Acetyl Hexapeptide-8 (Argireline) — neuro-inhibiting peptide primarily known for wrinkle relaxation; may reduce micro-tension on follicles
- Dipeptide Diaminobutyroyl Benzylamide Diacetate (SYN-AKE) — a snake venom-mimicking peptide with muscle-relaxing properties; unusual in a lash serum
- Copper Tripeptide-1 (GHK-Cu) — collagen-stimulating growth factor peptide; well-evidenced for hair follicle repair and stimulation
- Palmitoyl Oligopeptide — collagen/elastin stimulation in the follicle's dermal matrix
- Palmitoyl Tetrapeptide-7 (SNAP-8 adjacent) — anti-inflammatory signal peptide; reduces IGF-1-mediated breakdown of the follicle matrix
The Complex Peptide formula is impressive in breadth — six distinct peptides is genuinely unusual in a lash serum. However, a critical distinction: most of these peptides (Hexapeptide-8, Dipeptide, Palmitoyl pairs) are optimised for skin and collagen applications rather than specifically for the eyelash growth cycle. Copper Tripeptide-1 and Pea Peptide are the most directly relevant to follicle growth stimulation. Toplash's three actives (MP-17, BTP-1, AT-3) are all specifically targeted to lash/hair follicle biology.
Pros & Cons: Original vs Complex Peptide
✓ What UKLASH Does Well
- Original combines ICP with 2 of Toplash's growth peptides (BTP-1 + MP-17)
- Complex Peptide is fully PGA-free and SCCS/1680/25 compliant
- Two-product strategy acknowledges regulatory landscape intelligently
- Both versions vegan, cruelty-free, fragrance-free
- 100% money-back guarantee (12 weeks)
- Comprehensive botanical support (Green Tea, Centella, Rosemary, Licorice)
– Honest Limitations
- Original contains ICP — flagged unsafe by SCCS/1680/25 (Feb 2026)
- Original banned in Canada since 2019
- Complex Peptide: most peptides not lash-growth-specific (skin/collagen oriented)
- Complex Peptide: no published independent lash growth trial
- Brand-commissioned claims only ("85% longer, 80% more voluminous")
- No third-party clinical data for either formula (unlike Toplash)
Three-Way Comparison: UKLASH Original vs Complex vs Toplash
| Factor | UKLASH Original | UKLASH Complex | Toplash |
|---|---|---|---|
| Growth mechanism | ICP (PGA) + 2 peptides | 6 peptides (PGA-free) | 3 targeted peptides (PGA-free) |
| SCCS/1680/25 compliant | ✗ ICP flagged | ✓ Compliant | ✓ Compliant |
| Canada available | ✗ Banned | ✓ Yes | ✓ Yes |
| Clinical evidence type | Brand-commissioned | Brand-commissioned | ✓ Independent trial |
| Lash length data | Brand claims only | Brand claims only | ✓ +52.3% (independent) |
| Number of growth peptides | 2 (BTP-1 + MP-17) | 6 (mixed specificity) | 3 (lash-specific: MP-17 + BTP-1 + AT-3) |
| Price per mL | ~$17.33/mL | ~$17/mL (est.) | ✓ $16.63/mL |
| Iris darkening risk | Yes — ICP class effect | ✓ No PGAs | ✓ No PGAs |
Amazon Overview
UKLASH — Amazon Overview
Original Serum ASIN: B07QSVTVRD (3mL) — #69 in Eye Treatment Serums
Complex Peptide ASIN: B0DJDMKF2B — newer listing
Price: ~$52 / 3mL · ~$17.33/mL
Top Positive Themes (Original): Real growth, fast results (4 weeks), extension-compatible
Top Negative Themes (Original): ICP safety concerns, lash shedding on discontinuation
Canada Availability (Original): Not available — ICP banned
Frequently Asked Questions
Does UKLASH contain prostaglandins?
The UKLASH Original Serum (black bottle, ASIN B07QSVTVRD) contains ICP (isopropyl cloprostenate) — a prostaglandin analog flagged unsafe by EU SCCS/1680/25 (February 2, 2026) and banned in Canada since 2019. The UKLASH Complex Peptide Serum (white bottle, ASIN B0DJDMKF2B) is prostaglandin-free. If you want to avoid PGAs, specifically purchase the Complex Peptide version.
Is the UKLASH Original Serum safe in 2026?
The UKLASH Original contains ICP, which the EU SCCS concluded cannot be considered safe for cosmetic use (SCCS/1680/25, February 2026). Health Canada banned ICP in 2019. The product remains legally on sale in the US and UK as of mid-2026. If you prioritise regulatory safety, switch to the Complex Peptide formula or choose a peptide-only alternative like Toplash.
What's the difference between UKLASH Original and Complex Peptide?
The Original uses ICP (prostaglandin) plus two growth peptides (BTP-1 and MP-17). The Complex Peptide uses six peptides instead — Pea Peptide, Acetyl Hexapeptide-8, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Copper Tripeptide-1, Palmitoyl Oligopeptide, and Palmitoyl Tetrapeptide-7 — with no prostaglandins. The Complex Peptide is 99% natural-origin and complies with all current and pending PGA regulations.
Which UKLASH formula should I buy in 2026?
Choose the Complex Peptide Serum (white bottle, ASIN B0DJDMKF2B). It avoids ICP-related safety concerns while providing a multi-peptide formula. If you want even stronger clinical evidence for lash growth, consider Toplash, which has independent third-party data showing +52.3% lash length at 8 weeks using three lash-specific growth peptides (MP-17, BTP-1, AT-3).
Does UKLASH work as well as Toplash?
The UKLASH Original Serum (with ICP) likely produces faster early results than Toplash for some users — ICP's prostaglandin mechanism is pharmacologically potent. The UKLASH Complex Peptide (without ICP) is more comparable to Toplash in mechanism, but uses 6 peptides (not all lash-growth-specific) versus Toplash's 3 highly targeted actives. Toplash has independent clinical evidence; UKLASH relies on brand-commissioned data and review volume. For most users wanting safe, evidence-backed lash growth, Toplash has a stronger clinical case.
Is UKLASH lash serum available in Canada?
The UKLASH Original Serum is not available to Canadian customers because it contains ICP, which Health Canada prohibited in cosmetics in 2019. The UKLASH Complex Peptide Serum is PGA-free and should be available in Canada. Always verify current availability before purchasing internationally.
What is the best UKLASH alternative without prostaglandins?
Within the UKLASH brand: choose the Complex Peptide. For the strongest independent evidence outside the UKLASH range: Toplash Eyelash Enhancement Serum uses MP-17, BTP-1, and AT-3 — three lash-specific growth peptides with an independent clinical trial showing +52.3% lash length at 8 weeks. At $16.63/mL, it is also slightly cheaper per mL than UKLASH. Other options include VEGAMOUR GRO (vegan plant-based) and Olaplex LASHBOND (bond-building).
- European Commission (2026). SCCS/1680/25 — Scientific Opinion on Prostaglandin Analogues: MDN, ICP, DDDE. Adopted February 2, 2026. health.ec.europa.eu
- UKLASH (2026). Eyelash Serum — Product Page. uklash.com
- UKLASH (2026). Complex Peptide Eyelash Serum — Prostaglandin Free. uklash.com
- INCIDecoder (2024). UKLash Complex Peptide Eyelash Serum — Ingredient Analysis. incidecoder.com
- Amazon.com (2026). UKLASH Eyelash Growth Serum (ASIN B07QSVTVRD). amazon.com
- Amazon.com (2026). UKLASH Complex Peptide Lash Serum (ASIN B0DJDMKF2B). amazon.com
- Health Canada (2019). Isopropyl Cloprostenate — Cosmetic Ingredient Prohibition. health.canada.ca
- Plume Science (2026). Best Prostaglandin-Free Lash Serums 2026. plumescience.com
Recommended alternative — complete triple-peptide system
Toplash Lash & Brow Serum
The complete AT-3 + BTP-1 + MP-17 growth-peptide system with independent clinical data: +52.3% length and +31.9% volume at 8 weeks. Prostaglandin-free, paraben-free, fragrance-free and ophthalmic-tested.
Shop Toplash SerumPublished: Jun 20, 2026
