What is an eyelash serum?

An eyelash serum is a treatment formulated to lengthen, thicken and nourish your natural lashes — a kinder, lower-maintenance alternative to extensions. The best formulas combine active ingredients that condition the lash line and support healthier-looking growth from the root.

At By Babes, our clinically proven, prostaglandin-free Lash Growth Serum is built to do exactly that. It blends advanced lash-enhancing peptides with Biotin, Caffeine, Panthenol (Pro-Vitamin B5) and Hyaluronic Acid — actives selected to work together to strengthen, hydrate and visibly boost lash length, density and volume.

No hormones, no nasties: just a clean, vegan, cruelty-free formula made right here in the UK.

Sweep it along your lash line each evening and you can expect visibly longer, fuller, stronger-looking lashes in as little as 2 weeks, with full results within 12 weeks.

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How do eyelash serums work?

A lash serum works in two ways: conditioning and supporting growth. The conditioning side nourishes each lash from root to tip, keeping it hydrated and flexible so it's less likely to turn brittle and break.

The growth side goes to work at the lash line, supporting your lashes through the Anagen (active growth) phase of their natural cycle — helping them grow longer, fuller and stronger before they naturally shed. Because every lash sits at a different stage of that cycle, regular use is what keeps results building.

Conditioning — stronger lashes that don't snap

One of the biggest reasons lashes look short isn't slow growth — it's breakage. When lashes become dry and brittle, they snap off long before they've reached their full potential, leaving your lash line looking sparse.

This is where conditioning comes in. Nourishing actives like Hyaluronic Acid and Panthenol (Pro-Vitamin B5) work along the entire lash, from root to tip, keeping each one hydrated, soft and flexible. Flexible lashes bend instead of breaking, so they hold on for longer and have the chance to grow to their full natural length. Think of it as the difference between healthy, well-looked-after hair and hair that's dry and splitting — conditioning keeps your lashes in their best possible condition.

Growth — supporting the lash cycle

The growth side of the serum goes to work right at the base of your lashes, where new growth begins. A blend of advanced peptides, Biotin, Caffeine and Arginine supports your lashes during their active growth phase — energising the follicles, supporting circulation at the lash line and strengthening lashes from the root.

The result is lashes that grow in looking longer, denser and more defined over time. And because our formula does all of this using peptides and vitamins rather than prostaglandins or hormones, you get those results gently — no harsh ingredients required.

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The lash growth cycle explained (Anagen, Catagen, Telogen)

To understand why a serum takes time to work, it helps to know how your lashes naturally grow. Every lash moves through a three-phase cycle, and at any given moment your lashes are all at different stages.

Anagen (the growth phase) — This is when your lash is actively growing, and it lasts roughly 30–45 days. It's the most important phase for a serum, because this is when the formula can support and strengthen each lash as it grows.

Catagen (the transition phase) — Growth stops and the follicle begins to shrink. This phase is brief, lasting around 2–3 weeks, and is a normal part of the cycle.

Telogen (the resting and shedding phase) — The lash rests before naturally falling out to make way for a new one. This phase can last around 100 days, after which the cycle begins again.

Because your lashes are spread across all three phases, you won't see every lash transform at once. Results build gradually as more lashes move into the growth phase — which is exactly why consistency matters so much. Apply your serum nightly and keep going through the full cycle to see the real difference.

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How long will it take to see results?

Lash growth takes a little patience, babe — but it's worth it. Some babes notice a difference in as little as 2 weeks, most see a visible change around 4–6 weeks, and full results typically show by 12 weeks of consistent nightly use. It varies because your lashes are all at different points in their natural cycle, so results come through gradually as new lashes grow in. Top tip: take a before photo on day one so you can really see your transformation.

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How can I get the best out of my serum?

Consistency is everything. The single most important thing is applying your serum every night without skipping — results build over the full 12-week cycle, so don't give up early if you don't see change straight away. Once you've reached your lash goals, drop to 2–3 nights a week to maintain them. Store your bottle somewhere cool and dry, out of direct sunlight, with the lid closed tightly so the formula stays fresh and effective. It's also worth leaning on gentle, oil-free removers, as heavy oil-based products can stop the serum absorbing properly.

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What are prostaglandins, and why don't we include them?

Prostaglandins (and prostaglandin analogues) are ingredients used in some lash serums to force lash growth. They can work, but they're also linked to side effects like darkening of the iris and eyelid skin, eye irritation, redness and dryness. We don't believe longer lashes should come at that cost. That's why our Lash Growth Serum is 100% prostaglandin-free and hormone-free — we use peptides, vitamins and conditioning actives to deliver results gently and safely instead.

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What ingredients are in the eyelash serum?

Our formula is a blend of carefully chosen actives, each with a job to do:

Biotin — strengthens lashes and helps prevent breakage

Biotinoyl Tripeptide-1 — supports growth and helps reduce lash loss

Panthenol (Pro-Vitamin B5) — hydrates, smooths and protects

Caffeine — energises the follicles and supports circulation at the lash line

Arginine — supports blood flow and strengthens lashes at the roots.

Myristoyl peptides (Pentapeptide-17, Hexapeptide-16, Tetrapeptide-12) — work to boost density, volume and condition

Hyaluronic Acid — keeps lashes hydrated, soft and flexible

Everything is vegan, cruelty-free, prostaglandin-free and made in the UK.

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How do I use the eyelash serum?

It couldn't be simpler — think of it like applying a fine eyeliner:

Start with a clean, dry, makeup-free lash line.

Twist the wand and wipe any excess on the rim of the bottle — you only need a thin layer.

Sweep the applicator along the base of your upper lashes, where they meet the skin, in one smooth line.

Let it dry fully before applying anything else.

Use once every evening as part of your nighttime routine. There's no need to apply it to your lower lashes, and one swipe is plenty — more won't speed things up.

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What are the benefits of peptides?

Peptides are short chains of amino acids — the building blocks of the proteins (like keratin) that your lashes are made of. In a lash serum, they help support the natural processes behind healthy growth, improving length, density, volume and strength over time. Best of all, they do it gently — which makes peptides a brilliant prostaglandin-free alternative, giving you visibly fuller lashes without the harsh side effects linked to hormone- or prostaglandin-based formulas.

Frequently Asked Questions

  • Some babes notice a difference in as little as 2 weeks, most see a visible change around 4–6 weeks, and full results typically show by 12 weeks of consistent nightly use. It varies because your lashes are all at different stages of their natural cycle. Take a before photo on day one so you can really see your progress.

  • Our Lash Growth Serum is 100% prostaglandin-free and hormone-free. We use peptides, vitamins and conditioning actives instead, so you can grow longer-looking lashes without the side effects — like iris darkening or irritation — that are linked to prostaglandin-based formulas. It's also vegan, cruelty-free, made in the UK and tested via a third-party lab.

  • Yes. The formula is oil-free, so it's compatible with extensions. You can use it to keep your natural lashes healthy underneath your extensions, or to strengthen them as you transition away from extensions altogether.

  • Apply once every evening along your upper lash line for a minimum of 12 weeks to reach your lash goals. After that, you can drop to 2–3 nights a week to maintain your results.

  • There's no harm in stopping — your lashes will simply return to their natural state over time as the lash cycle continues. To keep your results, we recommend continuing to apply 2–3 times a week.

  • This serum is formulated for your upper lash line, and a single swipe there is all you need. For brows, our dedicated Brow Growth Serum is designed specifically for that area.

Real Customers, Real Results...