The best brow serum for most Australians is a prostaglandin-free conditioning formula used daily for 6–8 weeks — it delivers visibly fuller-looking brows without the irritation risks of hormone-derived ingredients. 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?
Brow hairs thin out from over-plucking, ageing and simple wear. A daily serum helps in two ways: conditioning ingredients (keratin, biotin, peptides) help existing hairs look and feel smoother and less brittle, so brows look fuller, and consistent care supports the appearance of new definition along the brow line. What no cosmetic serum does is change your hair biology overnight — anyone promising that is overselling.
How we compared them
Four criteria: formula type (prostaglandin-free or not), suitability for sensitive skin, 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 |
|---|---|---|---|---|
| Lash Originals Eyebrow Serum | Keratin + biotin + peptides, water-based | Yes | Mid-range | Sensitive skin, daily use, 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. Note that in February 2026 the EU's Scientific Committee on Consumer Safety concluded that none of the three prostaglandin analogues it assessed — DDDE among them — can be considered safe in cosmetics for promoting lash or brow growth. 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), sensitive-skin-friendly, at a mid-range price, shipped fast within Australia.
How long do brow serums take to work?
Brow hair cycles are slow. Expect conditioned, groomed-looking brows in 2–3 weeks, visible fullness improvements around weeks 6–8, and the full effect judged at around week 12. Individual results vary. Apply once daily to clean, dry brows and brush through with a spoolie.
FAQ
Can a brow serum help over-plucked brows look fuller?
A conditioning serum works on the hairs you already have — over 8–12 weeks it can make them look denser and better defined. It cannot bring back hair that is no longer there, so decades-old over-plucking will show less of a difference.
Can I wear makeup over brow serum?
Yes — let it dry for 1–2 minutes first.
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?
Look out for anything ending in "-prost" or "cloprostenate" on the ingredient list (prostaglandin analogues), and fragrance/alcohol-heavy formulas if your skin reacts easily. A water-based, fragrance-free, prostaglandin-free formula is the gentlest starting point.
Is it normal for a brow serum to sting or tingle?
A very mild, brief tingle can happen with active ingredients, but ongoing stinging, redness or swelling is not normal and means you should stop use and patch-test any new product before applying it to the full brow.
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 Serums: Side Effects & Safer Alternatives
Written by the Lash Originals Editorial Team · Reviewed 7 September 2026. This article is general cosmetic information, not medical advice.