Humidity has a talent for ruining a good hair day. One minute your hair is smooth, glossy and behaving itself, the next it has doubled in size before you have even made it to brunch. For Australians battling dry ends, frizz and damage, especially through changing seasons and sticky weather, a solid overnight treatment can make all the difference.
That is exactly why shoppers are rushing to grab the Kérastase Nutritive 8H Magic Night Hair Serum 90mL while it is discounted by 31 per cent on Amazon Australia. Normally priced at $99, the luxury hair treatment has dropped to $68, and more than 600 shoppers have snapped it up in the past month alone.
Designed as an overnight leave-in treatment, the serum works while you sleep to deeply nourish dry and damaged hair without leaving residue on your pillow. The formula contains niacinamide and plant-based proteins, ingredients that help hydrate, smooth and strengthen the hair fibre over an eight-hour period.
Unlike heavier hair oils that can leave strands greasy by morning, this serum has a lightweight texture designed to absorb quickly while still delivering intense moisture. According to Kérastase, it can reduce frizz by up to 94 per cent while improving manageability, softness and shine. For anyone who spends their mornings aggressively wrestling a hairbrush through tangled ends, the promise of easier styling is part of the appeal.
The treatment also targets future breakage by helping strengthen weakened hair fibres over time. Beauty lovers online have been particularly vocal about the results. One shopper described it as the "creme de la creme" of hair serums after years of trying products to manage frizz in Queensland humidity. "This product is the crem de la crem of hair serums," they wrote. "I have tried SO many different hair serums and oils to manage my hair that gets very frizzy and dry in the humidity. After using this one time, my hair immediately felt healthier, smoother and softer." They added that even their dry, splitting ends looked noticeably healthier after a week of use.
Another shopper said the serum completely transformed the texture of their hair. "Amazing product! This product made my hair super soft, from dry and course hair. Even my hairdresser was asking me what I had changed in my hair care routine." Luxury haircare has become one of the biggest beauty splurges of the past few years, with more shoppers treating their at-home routine like an extension of a salon visit.
Overnight products in particular are booming thanks to their low-effort appeal. Apply before bed, sleep, wake up looking slightly more expensive. The current Amazon Australia deal also makes the usually premium-priced serum feel far more justifiable, especially compared to the cost of regular salon treatments aimed at repairing dryness and breakage. For anyone whose hair has been feeling fried after heat styling, colouring, summer salt water or simply existing in Australian humidity, this is one of those beauty products that shoppers seem genuinely emotional about. And considering the discount, it may not stay in stock for long.
