The best brow serum depends on the ingredients you want, your routine and your budget — cosmetic conditioning may help existing brow hairs look smoother and fuller-looking, while results and individual suitability vary. Below we compare the most popular options available in Australia, including our own, on formula, ingredients and value — honestly.
What actually makes brows look fuller?
Conditioning can help existing brow hairs look smoother and more groomed, supporting a fuller-looking appearance. Individual results vary.
How we compared them
Four criteria: formula type (prostaglandin-free or not), directions and precautions, ease of daily use, and value per month of use. Prices below are indicative at the time of writing — check current pricing before you buy.
| Serum | Formula | Prostaglandin-free | Price tier | Best for |
|---|---|---|---|---|
| LashOriginals Eyebrow Serum | Keratin + biotin + peptides, water-based | Yes | Mid-range | Daily conditioning, AU shipping — 4.7★ average on Judge.me |
| The Ordinary Multi-Peptide Lash & Brow | Multi-peptide (4 peptide complexes), one formula for both | Yes | Budget (~A$25.90 / 5 mL) | Tightest budgets; one-product simplicity |
| RevitaBrow Advanced | Peptides plus dechloro dihydroxy difluoro ethylcloprostenolamide (DDDE) — a prostaglandin analogue, as listed on the Australian distributor's own ingredient list | No | Premium | Salon-brand loyalists. In February 2026, the EU's Scientific Committee on Consumer Safety concluded that none of the three prostaglandin analogues it assessed — including DDDE — could be considered safe for the specific eyelash and eyebrow cosmetic use addressed in its opinion. The brand does disclose the ingredient class in plain English on its packaging. |
| Nanobrow Eyebrow Serum | Peptides plus ethyl tafluprostamide — the same molecule as DDDE, under a different name, as listed on the brand's own Australian site | No | Premium | The one to read carefully: the ingredient name contains neither “prostaglandin” nor “-prost”, and its Australian page carries no plain-English note that the class is present. |
Why we recommend going prostaglandin-free
Prostaglandin analogues can produce faster, more dramatic results — but they're associated with skin darkening, irritation and redness around the application area, which matters even more on brows than lashes because the skin is exposed. That's why our own Eyebrow Serum takes the conditioning route: keratin, biotin and peptides in a lightweight, water-based formula you can wear under makeup. And check labels carefully: even "peptide" serums with big salon names can carry a hidden prostaglandin analogue — RevitaBrow Advanced, for example, lists DDDE alongside its peptides. Fair disclosure: The Ordinary wins on price. Where we believe we win is the balance — a dedicated, genuinely prostaglandin-free brow formula (not a shared lash formula), with clear daily-use directions, at a mid-range price, shipped fast within Australia.
How long do brow serums take to work?
There is no reliable fixed week when a cosmetic brow serum will change how brows look. It conditions existing brow hairs; the appearance and timing vary by person. Apply once daily to clean, dry brows and brush through with a spoolie, following the product directions.
FAQ
Can a brow serum help over-plucked brows look fuller?
A conditioning serum can help existing brow hairs look smoother and more groomed with consistent use. It cannot replace missing hairs; individual results vary.
Can I wear makeup over brow serum?
Yes — allow the serum to dry fully before applying brow makeup.
Can I use a lash serum on my brows?
Formulas overlap, but brow-specific applicators and textures are designed for skin coverage, not the lash line. If you want both, a dedicated duo is more hygienic than double-dipping one tube.
How much should I expect to pay for a good brow serum?
Genuine prostaglandin-free brow serums in Australia typically sit in the A$25–70 range for a 3–5 mL tube lasting 2–3 months. Premium salon brands charge A$150+, often for a formula that still contains a prostaglandin analogue — price alone is not a safety signal; always check the ingredient list.
What ingredients should I avoid if I have sensitive skin?
Check the complete ingredient list rather than relying on endings such as "-prost": prostaglandin analogues can appear under other names. If your skin is sensitive, review the formula and directions, patch test before first use, and stop using it if irritation occurs.
Is it normal for a brow serum to sting or tingle?
Stop use if you experience stinging, redness or swelling. Patch test before first use and seek professional advice if symptoms persist.
Browse: all LashOriginals brow serums and brow care.
Related reading
- How to Apply an Eyebrow Serum: Routine, Timing and Common Mistakes
- Do brow serums actually work? The evidence
- Do Lash Serums Actually Work? What the Science Says (2026)
- Prostaglandin Lash Serum Side Effects
Written by the Lash Originals Editorial Team · Reviewed 7 September 2026. This article is general cosmetic information, not medical advice.