A lash serum face-off: the one that truly grew my lashes

I've spent countless late nights scrolling through beauty TikTok and Sephora reviews, hunting for something that would give me the long, fluttery fringe I've always wanted. Mascara helps, but it never quite delivers the way a genuinely fuller, longer natural lash can. So when a friend in Manila swore by lash serums during her last trip home, I decided to take the plunge and test a handful myself, all from my bathroom shelf in Sydney.

Over the past six months, I rotated through five popular formulas available at Priceline, Adore Beauty, and a few I picked up at the Filipino grocery in Cabramatta. Some came in sleek mascara-style tubes with prostaglandin warnings; others were clean, vegan, and barely cost the price of a flat white in Melbourne's CBD. The differences in results were so striking that I had to share them, especially since so many Filipina readers ask me which one is truly worth the money.

A quick heads-up before we dive in: these are simply my personal observations, not medical advice. The Australian sun, our humidity up north, and the dry heat in Adelaide can all affect how your lashes grow and how serums absorb. If you're new to my beauty diaries, you can browse the rest of my reviews and lifestyle pieces over at Kikay Corner. With that said, here is what worked, what flopped, and what I'd happily repurchase.

What lash serums actually do (and don't do)

Most lash serums fall into one of two camps: prostaglandin-based formulas like bimatoprost-derived treatments that extend the growth phase of your hair, or peptide-and-biotin blends that nourish the existing follicle. The first category tends to deliver visible length in four to six weeks but can darken the iris or cause irritation around the lid. The second category is gentler and side-effect-free but usually delivers a subtler thickening rather than dramatic lengthening. Knowing which camp you prefer before you start shopping saves a lot of disappointment.

Aussie regulations are worth noting here. The Therapeutic Goods Administration has stricter rules around cosmetic claims than some other markets, which is why brands often market their prostaglandin serums as "lash conditioners" instead. That doesn't mean they're less effective, just that you should read the active ingredients list carefully rather than trusting the front-of-tube claims alone.

My six-month rotation in review

I dedicated roughly four to six weeks to each serum, snapping the same-angle photos under the same bathroom light every Sunday night. The lineup included GrandeLASH-MD, RevitaLash Advanced, The Ordinary Multi-Peptide Lash and Brow Serum, RapidLash, and a small tube of Lashfood's Phyto-Medic Natural Eyelash Enhancer I found on sale at a Chemist Warehouse in Parramatta. I applied each one to my upper lash line only, never the lower, to keep the comparison fair.

By week three, two serums had started showing visible changes. By week six, only one had me genuinely shocked at my morning reflection. The others either did nothing measurable, irritated my eyes during allergy season in Brisbane, or simply took too long to be worth the wait.

The clear winner for length

The standout for me was RevitaLash Advanced. Within five weeks, my lashes looked noticeably longer and slightly darker at the root, which meant I could skip eyeliner on most days. The brush applicator is slim and easy to control, even when you're half-asleep, and a tiny drop goes a long way. At around AUD $155 from Mecca, it's an investment, but the tube lasted me nearly five months.

GrandeLASH-MD came in a close second. It produced almost identical results, just a fraction slower, and I loved the glossy finish it left on my lashes during the day. The trade-off was a bit of redness on my waterline after week four, which only fully subsided once I switched back to RevitaLash. For anyone with sensitive eyes, I'd start with the gentler formula first to test your tolerance.

The serums that underperformed

The Ordinary Multi-Peptide serum was disappointing. I had high hopes because the brand's other skincare products are brilliant and affordable, but the lash serum barely budged my fringe after a full eight-week trial. The brush felt scratchy, and the formula dried too fast to reach the inner corners properly. At AUD $22 it's tempting, but the cost-per-result wasn't worth it for me.

RapidLash felt similar, perhaps a touch more effective, but the tube design was awkward and the serum itself had a strong herbal scent I never got used to. Lashfood's Phyto-Medic was the gentlest of the bunch, which I appreciated on days when my eyes felt puffy from a long day at Bondi, but the growth was so subtle I genuinely had to squint at my before-and-after photos to see a difference.

How to apply and where to buy in Australia

Whatever serum you choose, the application matters as much as the formula itself. Here is the routine that finally gave me the lashes I kept seeing in advertisements:

Consistency is honestly the biggest game-changer. I kept a small notebook on my vanity to tick off each application, because life in Australia gets busy between work, weekend markets, and family commitments, and it's easy to forget. Also, please remember to remove all serum before using a lash curler, as the oil-based formulas can weaken the curl.

Most of these serums are easy to find locally, which means no waiting three weeks for an overseas delivery. I regularly cross-check the latest shopping picks page for promo codes and seasonal discounts, and here is where I had the smoothest shopping experience:

For more of my beauty diaries, including a recent tie styling guide that saved my wardrobe from chaos, browse the rest of my reviews and tag me in your lash serum results. Your dream lashes might be just one consistent routine away.