I'm a massive fan of eyebrow serums, and have repeatedly shared how they've transformed my thin brows into full, thick ones that receive loads of compliments. I've been faithful to one specific product for years – but after trying a new one, I reckon I might be switching. RevitaBrow Advanced Eyebrow Serum has been my go-to for about five years; I've tried others, but none have given the same noticeable results as RevitaBrow.

However, a few months ago, I ran out (I had even started using its sister product RevitaLash on my eyebrows); without much thought, I grabbed another from my beauty cupboard: Olaplex BrowBond Repairing Serum – and the results have wowed me. READ MORE: 'This new non-flaking brow gel is a game-changer for thick, unruly eyebrows' From the creators of the cult favourite hair repairing treatment, this brow serum from Olaplex not only promotes hair growth but also minimises the appearance of new grey hairs and also doubles as a styling product, providing light hold and shape. It should be used every morning and night, allowing the product to dry before applying other skincare or make-up.

Olaplex's tests reveal that 90% of users showed more clinically-measured brow density after 12 weeks of twice-daily use, while 93% agreed brows looked healthier, reports the Mirror . A 3.5ml tube costs £64 , while subscribing to regular purchases reduces the price to £57.

50; it's not cheap, but it's almost half the price of RevitaBrow, which costs £105 for a 3ml tube. I .