Why? You ask, well it turns out that the hero of haircare: argan oil, isn't all that heroic. While argan oil is great for hydrating and repairing hair as well as smoothing dry ends, it has one major flaw - it's colour. Pump a few drops into your palm and you'll see what we're talking about, it's y e l l o w.

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In it's purest form, Moroccan argan oil is a deep, golden yellow in colour. The argan oil used in beauty products is lightened slightly to a honey-dew shade but nonetheless, it's still yellow. So despite your best efforts to keep your hair brass-free, if you're using argan oil - you're hair is going to turn yellow.