If you wear eyelash extensions in Los Angeles, your natural lashes aren’t just hair. They’re the foundation everything else is built on. Weak, thinning, or overworked natural lashes mean poor retention, patchy fills, and sets that never quite look the way they should.
That’s the problem Belris® set out to solve.
The Belris® Lash Growth Serum was developed specifically for extension wearers—a prostaglandin-free, oil-free formula that strengthens natural lashes from the follicle up, without touching your retention or compromising your adhesive bond. It also works on brows, making it the only aftercare product you need for both.
This is not a trend serum. It’s precision lash science in a $125 bottle.
Why Most Lash Serums Are Wrong for Extension Wearers
The lash serum market is flooded with products that were never formulated with extension wearers in mind. They’re designed for bare lashes and marketed broadly—and when extension clients use them, the results range from disappointing to genuinely damaging.
The most common offenders:
• Oils (castor, coconut, argan, almond) — These dissolve lash adhesive. Even small amounts reduce the bond strength that holds your extensions in place, causing premature shedding and patchy retention.
• Prostaglandins — Associated with eyelid darkening, lash line discoloration, changes in eye pigmentation, and in some cases periorbital fat loss (a sunken eye appearance). Many popular serums still use them.
• Hormone analogs — Produce growth by mimicking hormones, with side effects that extend well beyond your lash line.
• Heavy or occlusive formulas — Interfere with cyanoacrylate bonding and create a film over the lash line that prevents clean adhesion.
At Belris®, we see the consequences of mismatched serums regularly in corrective appointments—premature shedding, irritated lash lines, weakened follicles, gaps between fills. Your lash serum should be working with your extensions, not against them.
What Makes Belris® Lash Growth Serum Different
1. 100% Oil-Free, Water-Based Formula
Oil dissolves lash adhesive. That’s not a nuance—it’s chemistry. Even trace amounts of oil weaken the bond that holds every extension to your natural lash.
The Belris® formula is completely oil-free and water-based, making it fully compatible with classic, hybrid, volume, and mega volume extensions. It integrates into your nightly routine without touching your retention.
2. Prostaglandin-Free Growth Technology
We don’t use prostaglandins. Full stop.
Prostaglandins have been linked to eyelid darkening, lash line discoloration, dryness, redness, changes in eye pigmentation, and periorbital fat loss over time. The risk-to-benefit ratio simply doesn’t hold up—especially for clients using a serum daily for months.
Instead, the Belris® formula uses a peptide-based growth support system that works at the follicle level—strengthening, nourishing, and extending the growth cycle without hormone-like side effects. Safe for sensitive eyes, contact lens wearers, and long-term daily use.
3. Advanced Peptide Complex
The active core of the Belris® formula includes:
• Myristoyl Pentapeptide-17 — Signals follicles to support keratin production, the protein lashes are made of
• Biotinoyl Tripeptide-1 — Anchors the peptide complex to the follicle for sustained delivery
• Amino acid strengthening complex — Reduces breakage and improves lash integrity
• Panthenol (Vitamin B5) — Hydrates and conditions from root to tip
• Hyaluronic acid support — Maintains the lash line moisture balance
The result is follicle-level support—not a cosmetic coating that makes lashes look thicker until you wash it off, but genuine structural improvement that compounds over weeks.
Why Lash Serum Is Non-Negotiable for Extension Wearers
Extension wearers put their natural lashes through a consistent cycle of weight stress, adhesive bonding, shedding, and environmental exposure. Over time—without proper support—natural lashes thin. Sets start looking sparse sooner. Fills are more frequent. The whole system becomes less efficient.
Belris® Lash Growth Serum is designed to interrupt that cycle. When your natural lashes are stronger:
• Extensions look fuller at every stage of the cycle, not just right after a fill
• Retention improves because healthy lashes provide a better bonding surface
• Shedding is more even, with fewer dramatic gaps between appointments
• Fill appointments stretch further, reducing both time and cost
Stronger natural lashes = stronger retention. That’s the whole equation.
Ingredients Belris® Refuses to Use
Luxury means knowing what to leave out. The Belris® formula contains none of the following:
✗ Castor oil
✗ Coconut oil
✗ Argan oil
✗ Almond oil
✗ Prostaglandins
✗ Hormone analogs
✗ Parabens
✗ Synthetic fragrance
✗ Harsh preservatives
✗ Alcohol drying agents
If an ingredient compromises lash health, adhesive stability, or long-term eye safety, it doesn’t enter our formula. No exceptions.
One Serum. Lashes and Brows.
The Belris® Lash Growth Serum is dual-use by design. The same peptide complex that strengthens your lash follicles works equally well on brow hair—making it safe and effective alongside brow lamination, microblading, powder brows, and brow shaping treatments.
For clients who invest in both their lash and brow services, this is the one aftercare product that covers both—without the risk of cross-contamination between formulas.
How to Use It With Eyelash Extensions
Application is straightforward, but precision matters:
• Apply at night only — One thin swipe along the upper lash line skin, not on the extensions themselves
• Clean, dry skin — Always apply after your lash bath, once the lash line is fully dry
• Wait after fills — Hold off for at least 4–6 hours after a fresh appointment before applying
• One swipe is enough — Over-application doesn’t accelerate growth; it increases irritation risk
Morning application is fine on bare lashes but unnecessary when worn with extensions—evening application gives the formula uninterrupted time to work during your natural overnight repair cycle.
When You’ll See Results
Growth support works with your biology, not against it. The natural lash cycle averages 6–10 weeks, so timeline expectations should be realistic:
• Weeks 2–3: Lashes feel noticeably stronger and less brittle
• Weeks 4–6: Visible improvements in length and a reduction in breakage
• Weeks 8–12: Full density improvement as the peptide complex completes a full growth cycle
Consistency is the only variable. Clients who apply nightly without gaps see the most dramatic results.
Who Should Use the Belris® Lash Growth Serum
This serum was formulated for:
✓ Eyelash extension wearers who want to protect their natural lash foundation
✓ Clients experiencing lash thinning or increased shedding between fills
✓ Post-extension recovery — rebuilding natural density after a break
✓ Clients with sensitive eyes or a history of reactions to conventional serums
✓ Contact lens wearers
✓ Brow lamination, microblading, or permanent makeup clients
✓ Anyone who has used a prostaglandin serum and wants a safer long-term alternative
If you invest in professional lashes, your aftercare should match the standard.
Frequently Asked Questions
Will lash serum make my extensions fall out?
Only if it contains oils or irritants. The Belris® formula is 100% oil-free and extension-safe—it supports retention rather than compromising it.
Are prostaglandin-free serums actually effective?
Yes. Modern peptide complexes stimulate follicle health at the structural level without hormone-like side effects. Results are steady, safe, and sustainable over a full growth cycle.
How often should I apply it?
Nightly. Daily consistency is the single biggest factor in results.
Can I use it with volume or mega volume lash extensions?
Yes. The formula is compatible with all extension types—classic, hybrid, volume, and mega volume.
Is it safe for sensitive eyes?
Yes. It’s formulated without fragrance, oils, prostaglandins, parabens, or harsh preservatives—specifically to be safe for long-term daily use on sensitive eyes.
Can I use it on my brows?
Yes. The same peptide complex supports brow density and is safe alongside brow lamination, microblading, and other brow treatments.
When should I apply it relative to my lash bath?
After your lash bath, once the lash line is fully dry. Always last in your evening routine.
The Belris® Standard
At Belris®, we build formulas the same way we build lash sets: with precision, clean ingredients, no shortcuts, and long-term health as the non-negotiable priority.
Every lash set we apply is only as strong as the natural lashes beneath it. The Belris® Lash Growth Serum exists to make sure that foundation is never the weak link.
Because lash luxury starts at the root.
Belris® Lash Growth Serum — $125 — belris.art
Prostaglandin-Free. Oil-Free. Extension-Safe. Professional Grade.
