Finding a luxury beauty product you already know you love on sale is like winning the beauty lottery, especially when you’re running low and especially when it is Kérastase.

The French haircare brand has become something of a fixture in the bathrooms of people who take their hair very seriously and for good reason.

It’s a product with a reputation behind it and Kérastase is not exactly the brand I associate with bargain hunting.

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Which is why seeing the Kérastase Nutritive Rich Nourishing Shampoo marked down from $62 to $49 has immediately caught my attention.

That is a 21 per cent saving, and more importantly, it is the kind of discount that makes a luxury haircare purchase considerably easier to justify.

Kérastase Nutritive shampoo is currently marked down to $49 from $62. Credit: Kérastase

The Nutritive range is designed specifically with dry and very dry hair in mind, so this is one for anyone whose strands are currently giving you the impression they have had a difficult week.

The shampoo is formulated to gently cleanse while providing hydration and nourishment, leaving hair feeling soft, smooth and easier to manage after washing.

It is powered by plant-based proteins and niacinamide, with the formula designed to help nourish the hair and maintain its hydration.

The end goal is beautifully straightforward: hair that feels softer, smoother and more nourished after you wash it.

With more than 100 purchased in the past month. That kind of interest is worth noting if you have been waiting for a reason to finally try the range.

The luxury haircare favourite is designed for dry and very dry hair. Credit: Instagram

I have a theory that luxury haircare is one of those categories where the discount has to be just right. A $2 saving is not going to have me abandoning my sensible shopping habits. But $13 off a Kérastase shampoo? I’m adding it to my virtual shopping cart.

The Nutritive shampoo also gives you a convenient excuse to slowly build out the rest of the range without making one enormous beauty order.

The Kérastase Nutritive Rich Nourishing Shampoo is currently 21 per cent off, making it $49 instead of $62 in this limited-time deal. Credit: Kérastase

The matching conditioner is $71 at full price, while the hair mask is $92. And you never know, those might eventually get their own moment in the sale spotlight too. We can dream.

For now, though, the shampoo is the one getting the discount treatment.

If your hair is feeling dry or lacking that soft, silky finish you want after washing, this could be a good time to give your usual shampoo a holiday and try something a little more luxurious.

Just do not blame me when the conditioner starts looking suspiciously tempting.