DIME Beauty Eyelash Boost Serum Review
BTP-1 + Myristoyl Pentapeptide-4 + 14-AA NMF Complex + Niacinamide — Genuine Growth Peptides at an Accessible Price
Updated: June 20, 2026 Written by: Branda M. Heim Reviewed by: Branda M. Heim, Board-Certified Cosmetologist8 referencesView Toplash SerumBrand & Product Overview
DIME Beauty is a US-based clean beauty brand focused on accessible, high-quality skincare and beauty products. Their Eyelash Boost Serum (6 mL, ASIN B08ZNYJHQL) is explicitly marketed as prostaglandin-free — one of the first things highlighted on the product page — and pairs real growth peptides with an unusually comprehensive amino acid conditioning complex.
🌿 $38 / 6 mL = ~$6.33 per mL · Exceptional Budget-Tier Peptide Value
BTP-1 (Biotinoyl Tripeptide-1) — activates follicle bulge stem cells to initiate the anagen growth phase. The same peptide in Toplash's triple system. In-vitro: +17% lash length, +19% thickness at 30 days.
MP-4 (Myristoyl Pentapeptide-4) — a myristoylated five-amino-acid peptide targeting follicle dermal papilla cells. Related to but distinct from Toplash's MP-17 (Myristoyl Pentapeptide-17). MP-4 primarily stimulates collagen and GAG synthesis in the follicle matrix, supporting the structural environment for anagen growth.
BTP-1 & MP-4: The Two-Peptide Growth System
BTP-1 (Biotinoyl Tripeptide-1) — Anagen Activator
BTP-1 is a biotin-conjugated tripeptide (biotinyl-GHK) that directly activates follicle bulge stem cells — the progenitor cells responsible for initiating each new anagen phase. This is the same peptide found in Toplash, No7, Kosas GrowPotion, and Typology L37. At the in-vitro concentration used by SpecPed LashLD (2%), BTP-1 produced +17% lash length and +19% thickness at 30 days.
MP-4 (Myristoyl Pentapeptide-4) — Dermal Matrix Supporter
Myristoyl Pentapeptide-4 is a myristoylated (lipid-conjugated) five-amino-acid peptide that targets the hair follicle's dermal papilla cells. Its primary mechanism is stimulation of collagen I, collagen IV, fibronectin, and glycosaminoglycan (GAG) synthesis — the structural proteins that form the follicle's dermal matrix. This differs from Toplash's MP-17 (Myristoyl Pentapeptide-17), which directly upregulates keratin synthesis genes.
The two myristoyl pentapeptides work at different levels: MP-4 rebuilds the follicle's structural scaffolding; MP-17 signals the follicle to produce more keratin. DIME's approach targets matrix support; Toplash's approach targets direct keratin production.
Niacinamide (Vitamin B3) is an unusual and genuinely beneficial addition. In skin applications, Niacinamide strengthens the barrier, reduces inflammation, and improves microcirculation. For the lash line specifically:
Anti-inflammatory: Chronic low-grade periorbital inflammation (from makeup removal friction, eye rubbing, or skin sensitivity) can suppress healthy follicle function. Niacinamide at the lash line addresses this.
Scalp hair evidence: One published clinical study found 3% topical Niacinamide significantly increased hair fullness in androgenic alopecia patients after 6 months — suggesting follicle-level benefit beyond pure skin barrier support.
Barrier strengthening: A stronger skin barrier at the lash line reduces irritant penetration, protecting the periorbital follicle environment from external stressors.
Full Ingredient Analysis
The complete INCI for DIME Beauty Eyelash Boost Serum includes the following key categories:
| # | INCI Name | Function |
|---|---|---|
| 1 | Water | Solvent base |
| 2 | Glycerin | Humectant · moisture retention |
| 3–16 | 14-Amino Acid NMF Complex NMF Complex Sodium PCA · Sodium Lactate · Arginine · Aspartic Acid · PCA · Glycine · Alanine · Serine · Valine · Proline · Threonine · Isoleucine · Histidine · Phenylalanine |
Natural Moisturizing Factor amino acid blend · lash strand conditioning · keratin substrate support · hydration · biomimetic skin-identical moisturisation |
| 17 | Panthenol (Provitamin B5) | Conditioning · moisture · cortex penetrant |
| 18 | Aloe Leaf Extract Botanical | Soothing · anti-inflammatory · Acemannan polysaccharide · hydration |
| 19 | Niacinamide (Vitamin B3) B3 Active | Barrier strengthening · periorbital anti-inflammatory · microcirculation support · follicle microenvironment protection · some scalp hair density evidence |
| 20 | Purslane (Portulaca Oleracea) Extract Botanical | Antioxidant · Omega-3 (ALA) rich · anti-inflammatory succulent extract |
| 21 | Terminalia Chebula (Chebulic) Fruit Extract Ayurvedic | Potent Ayurvedic antioxidant · tannin-rich · anti-aging · antimicrobial |
| 22 | Malus Domestica (Apple) Fruit Extract Apple | Antioxidant polyphenols · stem cell vitality support · quercetin + chlorogenic acid |
| 23 | Tocopherol Vit E | Natural Vitamin E · antioxidant · lipid peroxidation protection |
| 24 | 1,2-Hexanediol Preserve | Humectant · mild antimicrobial · preservative booster |
| 25 | Biotinoyl Tripeptide-1 (BTP-1) Shared with Toplash | Biotinyl-GHK tripeptide · activates follicle bulge stem cells → anagen initiation · +17% length, +19% thickness (in-vitro, 30 days) |
| 26 | Myristoyl Pentapeptide-4 (MP-4) Growth Peptide | Myristoylated five-AA peptide · stimulates collagen I, collagen IV, fibronectin & GAG synthesis in dermal papilla · follicle structural matrix support · different mechanism from MP-17 |
The 14-amino acid NMF complex (positions 3–16) is a standout feature rarely seen in lash serums. Natural Moisturizing Factor amino acids — including sodium PCA, sodium lactate, and the amino acids that make up natural skin hydration — provide a biomimetic conditioning environment that goes well beyond simple glycerin hydration. This likely contributes significantly to the "stronger, more flexible" lash strand reported by users.
Safety Profile
DIME Beauty explicitly markets the Eyelash Boost Serum as prostaglandin-free and hormone-free. The INCI confirms no ICP, DDDE, MDN, or any FP-receptor agonist. Fully compliant with SCCS/1680/25 (February 2026). No risk of iris pigmentation, periorbital fat atrophy, or eyelid hyperpigmentation. Safe for use in the EU, UK, Canada, and US without restriction.
The formula is paraben-free. The preservative system relies on 1,2-Hexanediol — a widely used, well-tolerated humectant-preservative. The formula is free from harsh alcohols, silicones, and synthetic fragrances consistent with DIME's clean beauty positioning.
Peptide Coverage: DIME vs. Toplash
| Peptide | DIME Beauty | Toplash |
|---|---|---|
| AT-3 (Acetyl Tetrapeptide-3) Anchors follicle to dermal papilla |
✗ Not present | ✅ Included |
| BTP-1 (Biotinoyl Tripeptide-1) Both Follicle stem cell activation → anagen |
✅ Included | ✅ Included |
| MP-17 (Myristoyl Pentapeptide-17) Upregulates keratin synthesis directly |
✗ Not present | ✅ Included |
| MP-4 (Myristoyl Pentapeptide-4) Follicle matrix collagen + GAG support |
✅ DIME exclusive | ✗ |
| Niacinamide (B3) Anti-inflammatory barrier support |
✅ Included | Not primary active |
DIME Beauty vs. Toplash: Full Comparison
| Parameter | DIME Beauty | Toplash |
|---|---|---|
| PGA-Free | ✅ Yes (explicit brand claim) | ✅ Yes |
| Paraben-Free | ✅ Yes | ✅ Yes |
| Price per mL | ~$6.33/mL | $16.63/mL |
| Size | 6 mL | ~3 mL |
| AT-3 (follicle anchoring) | ✗ | ✅ Included |
| BTP-1 (anagen activation) | ✅ Included | ✅ Included |
| MP-17 (keratin upregulation) | ✗ | ✅ Included |
| MP-4 (matrix collagen + GAG) | ✅ Included | ✗ |
| Niacinamide (B3 barrier/anti-inflam) | ✅ Included | Not primary active |
| 14-AA NMF conditioning complex | ✅ Included | Not primary active |
| Independent clinical evidence | Brand claims only (60+ days) | Independent 8-week digital trial |
| Measured lash length gain | Not independently measured | +52.3% (independent) |
Frequently Asked Questions
Does DIME Beauty lash serum contain prostaglandins?
No. DIME Beauty explicitly markets the Eyelash Boost Serum as prostaglandin-free. The INCI confirms no ICP, DDDE, MDN, or any prostaglandin analogue. It is fully compliant with SCCS/1680/25 (February 2026). No risk of iris darkening, periorbital fat atrophy, or eyelid hyperpigmentation.
Does DIME Beauty lash serum share ingredients with Toplash?
Yes. DIME contains BTP-1 (Biotinoyl Tripeptide-1) — one of Toplash's three growth peptides — which activates follicle bulge stem cells to initiate the anagen growth phase. DIME also adds Myristoyl Pentapeptide-4 (MP-4) — related to but distinct from Toplash's MP-17. DIME does not contain AT-3 (follicle anchoring) or MP-17 (keratin gene upregulation) from Toplash's triple system.
What is Myristoyl Pentapeptide-4 in DIME lash serum?
Myristoyl Pentapeptide-4 (MP-4) is a myristoylated five-amino-acid peptide that targets the hair follicle's dermal papilla. Its primary function is stimulating collagen I, collagen IV, fibronectin, and glycosaminoglycan (GAG) synthesis in the follicle structural matrix. This differs from Toplash's MP-17 (Myristoyl Pentapeptide-17), which directly upregulates keratin synthesis genes. Both are valuable — MP-4 rebuilds the follicle's structural environment; MP-17 signals keratin production directly.
What does Niacinamide do in DIME lash serum?
Niacinamide (Vitamin B3) strengthens the periorbital skin barrier, reduces inflammation at the lash line, and improves microcirculation. Chronic low-grade periorbital inflammation can suppress healthy follicle function — Niacinamide addresses this. Published research on 3% topical Niacinamide shows improved hair fullness in androgenic alopecia patients, suggesting direct follicle benefit. It's an unusual but genuinely valuable addition to a lash serum formula.
How much does DIME Beauty lash serum cost?
DIME Beauty Eyelash Boost Serum retails at $38 on dimebeautyco.com and approximately $44–48 at Amazon (ASIN B08ZNYJHQL), for 6 mL — equating to approximately $6.33–8/mL. This makes it one of the best-value peptide lash serums reviewed, offering two dedicated growth peptides (BTP-1 + MP-4) plus Niacinamide at a fraction of the cost of premium serums.
Is DIME Beauty lash serum clean and vegan?
DIME Beauty operates as a clean beauty brand. The Eyelash Boost Serum is free from parabens, silicones, harsh alcohols, and synthetic fragrances. The botanical actives (Aloe, Purslane, Chebulic Fruit, Apple Fruit) support a clean beauty formulation profile. The formula is marketed as suitable for sensitive eyes. Check the current product label to confirm vegan status, as DIME's animal-derived ingredient policy should be verified directly.
How does DIME Beauty lash serum compare to Toplash?
DIME shares one peptide with Toplash (BTP-1) and adds MP-4 and Niacinamide. It costs ~$6.33/mL vs Toplash's $16.63/mL. Toplash additionally has AT-3 (follicle anchoring to prevent premature shedding) and MP-17 (direct keratin synthesis upregulation), with an independent 8-week clinical trial (+52.3% length). DIME is the best mid-budget two-peptide option; Toplash offers complete three-point follicle coverage with independent evidence.
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 SerumReferences
- DIME Beauty Co. "Eyelash Boost Serum." dimebeautyco.com. Accessed June 2026. ASIN B08ZNYJHQL.
- Incidecoder. "DIME Eyelash Boost Serum — Ingredients Explained." incidecoder.com. Accessed June 2026.
- SkinSafe. "DIME Beauty Eyelash Boost Serum — Ingredients and Reviews." skinsafeproducts.com. Accessed June 2026.
- SCCS (Scientific Committee on Consumer Safety). Opinion on ICP, DDDE and MDN in cosmetics. SCCS/1680/25. February 2, 2026.
- Draelos ZD et al. "The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer." British Journal of Dermatology. 2006;154(6):1035–40.
- Trost LB, Bergfeld WF, Calogeras E. "The diagnosis and treatment of iron deficiency and its potential relationship to hair loss." Journal of the American Academy of Dermatology. 2006;54(5):824–44.
- Toplash Independent Clinical Trial Data. Triple-Peptide AT-3 + BTP-1 + MP-17 (8-week, digital image analysis). Internal report on file.
- Amazon.com. "DIME Beauty Eyelash Boost Serum." ASIN B08ZNYJHQL. Accessed June 2026.