Key Takeaways
- The Lash/Brow Growth Serum is designed and labeled for both brows and lashes, with a shared formula and instructions.
- Key ingredients: human stem cell conditioned media, panthenol, biotin, and ocimum basilicum hairy root extract, plus supporting conditioners.
- The manufacturer claims you may see visible changes in as little as 4 weeks, with more dramatic results in 4–6 weeks.
- Clean skin, careful twice-daily application, and allowing drying time are critical for safe use.
- No prostaglandins, no eye color change, and free from parabens, mineral oil, sulfates, phthalates, urea, DEA, and TEA. Never tested on animals.
Does brow growth serum work on eyelashes?
The manufacturer’s position is clear: their brow growth serum is intended for lashes too. Factor Five sells one combined Lash/Brow Growth Serum and provides identical usage directions and timelines for both areas. You’re expected to apply the serum using short strokes along the upper lash line and on brows, twice a day.
The ingredient lineup, human stem cell conditioned media (source of growth factors), panthenol, biotin, and ocimum basilicum hairy root extract, aims to strengthen, thicken, and condition both lash and brow hairs. The formula avoids prostaglandins, so it won’t discolor your eyes, and is free from harsh or allergenic additives typically flagged in lash serums.
Summary Table: Brow vs. Lash Use
| Category | Manufacturer Statement for Both Areas |
|---|---|
| Product Label | Lash/Brow Growth Serum; one bottle, one formula |
| Main Active Ingredients | Human stem cell conditioned media, panthenol, biotin, ocimum basilicum hairy root extract |
| Additional Components | Glycerin, aloe barbadensis leaf juice, niacinamide, sodium hyaluronate, caffeine, tocopherol, camellia sinensis leaf extract, zinc chloride |
| Application Protocol | Shake, apply short strokes to clean skin (lashes, brows), let dry, use twice a day |
| Expected Results | Fuller, thicker hair in as little as 4 weeks (4–6 weeks typical) |
| Safety/Ethics | Prostaglandin-free, no eye color change, discontinue if irritation, made in USA, ethically sourced, not tested on animals, no animal-derived cells |
| Size | 0.1 fl. oz. (3 mL) |
You can view the Lash/Brow Growth Serum here for full ingredient transparency and to see the dual-use claim directly.
Shared formula and protocol for lashes and brows
Is it safe to use brow serum on eyelashes?
The manufacturer says yes, if you follow their directions closely.
Their usage protocol:
- Apply to clean, dry skin.
- Gently shake the bottle.
- Use a few short strokes along the upper lash line (and brows if desired) twice daily.
- Wait until fully dry before layering other products.
- Stop immediately if you notice irritation or burning, and avoid direct contact with your eyes.
The product is marketed as “skin-loving” and free of prostaglandins, parabens, mineral oil, sulfates, phthalates, urea, DEA, and TEA. All claims are tied to careful application and strict avoidance of direct eye exposure. Any irritation means you should discontinue right away.
While clinical safety data isn’t supplied, the serum’s ingredient list and instructions reflect common industry precautions for serums intended for use near the eyes. You’re responsible for precise application and should not use it if you have known sensitivities.
If you use up the bottle with consistent twice-daily application, the manufacturer outlines how to safely recycle and monitor the bottle’s supply.
Does eyebrow growth serum really work for lashes?
According to Factor Five, yes, the same serum covers both brows and lashes. There’s no functional or ingredient difference between the applications. You apply the product exactly the same way and may see visible improvements in both areas within 4 to 6 weeks. The growth factors and conditioners in the formula are meant to support hair thickness and strength wherever you use them.
The company does not provide before-and-after measurements, blinded studies, or user-reported success statistics. You receive an expectation of “fuller, thicker” hairs, results may vary by person. The small 3 mL tube lasts a matter of weeks at full twice-daily dosage, so the window to judge efficacy lines up with the claimed timeline.
Bottom line, their claim is built on the fact that both lash and brow hairs can benefit from similar growth support when applied carefully and consistently, but results can’t be guaranteed for everyone.
Is eyebrow growth serum basically the same as eyelash serum?
In this case, yes. Factor Five makes no distinction. Their Lash/Brow Growth Serum is the only formula they offer for both areas. Ingredient concentration, directions, safety precautions, and expected results are unified.
There are no lash-only or brow-only versions. They don’t claim that their dual-use approach outperforms dedicated lash-only serums on the market, but if you’re seeking one product for both, this is their intended solution.
Other ingredients (aloe barbadensis leaf juice, green tea extract, sodium hyaluronate) are included for overall skin health and hair conditioning, not specifically to differentiate brow from lash performance. Your main requirements are clean-skin application, patience, and keeping up with the twice daily routine.
Decision Framework: Should You Use a Brow Growth Serum on Lashes?
Use the following decision flow to see if this product aligns with your needs:
- Need prostaglandin-free and eye-safe?
The serum contains no prostaglandins and claims not to change eye color. - Ingredient match?
If you want growth factors (human stem cell conditioned media) and standard conditioners (panthenol, biotin), this fits. - Commitment to routine?
Twice-daily, precise application and waiting for full drying are non-negotiable. - Willingness to stop at any irritation?
Must discontinue if any irritation occurs or if product reaches the eyes.
If you can answer yes to all, this product matches your priorities. If your requirements or sensitivities differ, you may want a more specialized formula.
Who Shouldn't Use This Serum?
Not recommended for you if:
- You want instant or guaranteed results. The manufacturer only offers a possibility (“as little as 4 weeks”) and doesn’t promise specific outcomes.
- You can’t commit to consistent, proper, twice-daily application on clean skin.
- You have a history of sensitivity around your eyes, use must stop immediately at any irritation.
- You expect permanent results. No product permanence is claimed.
Verdict
The evidence from the manufacturer is consistent: their brow growth serum is intended and claimed to work for eyelashes, too. It’s one bottle, one ingredient deck, one protocol, and one timeline for both. Its prostaglandin-free status and stated safety profile are pluses for those avoiding eye-color-change risks. Still, the absence of published success rates or before-and-after studies means your results may vary, and you’ll need to stick with the daily process for weeks to fairly judge for yourself. The decision tree and ingredient comparison above bring all the facts in one place. If their claims and use requirements align with how you approach brow and lash products, this combined serum could be a fit. If not, there’s no harm looking for more specialized options.
Want to check the full product details and decide for yourself? View the Lash/Brow Growth Serum.
FAQ
How do you apply brow growth serum to your lashes?
Shake the bottle first. On clean skin, apply a few short strokes along the upper lash line. Wait for it to dry completely before using any other products. Use morning and night. If you want, layer the Eye/Lash Cream after the serum dries.
Will brow growth serum actually create longer or thicker lashes?
The serum promises lashes that look fuller and thicker in 4 to 6 weeks. It does not specifically claim increased length and does not provide measurement data.
Is there a risk of eye irritation or eye color change?
No eye color change; the formula contains no prostaglandins. However, getting it in your eyes can cause slight burning. Stop use immediately if you develop irritation.
What’s the difference between this brow serum and a dedicated lash serum?
Factor Five only makes a single combined Lash/Brow Growth Serum, no separate lash formula. Ingredients, directions, and use cases are identical for both brows and lashes.
How long will the bottle last with twice-daily use?
A 3 mL tube typically lasts several weeks when used for both lashes and brows as directed.
Does this serum offer permanent results?
No. The manufacturer does not claim permanence. Ongoing use may be needed to maintain any effect.
Is the stem cell ingredient animal-derived?
No. The serum uses ethically sourced human stem cells only and is never tested on animals.
What if I miss an application?
The company doesn’t address this directly, but as with most serums, missing applications may reduce or delay visible results compared to the suggested routine.