Embracing naturally grey hair is much more low maintenance than dying it, but it still needs to be looked after correctly.

Lighter tones of silver, grey and blonde can turn slightly yellow after a while for several reasons – many of which are hard to avoid.

According to David H. Kingsley, a hair and scalp specialist in New York City, chlorine and other chemical residues in water, sunlight, and even oils from the scalp are often to blame for a yellow-toned “cast” over grey locks.

While these factors may be hard to avoid, there is one simple fix that can rejuvenate hair, according to hair and beauty expert “Glam Girl Gabi”.

In a video posted to her channel, the popular YouTube content creator said: “My first ageing hair tip for you – whether you’re a man or a woman – is to regularly include a purple product in your routine.”

She continued: “It sounds very strange but purple is the opposite of yellow on the colour wheel, and because of that it neutralises yellow tones and turns them bright and icy.”

This may be in the form of a shampoo, conditioner, oil or serum – almost any combination will work. Gabi claimed: “It’s literally magic, it’s amazing how it works.”

If your hair is white, salt and pepper, or blonde, you can keep it looking great by using a purple shampoo around two or three times a week.

Choose a shampoo that will do more than just neutralise yellow. It should also hydrate, strengthen and give your hair volume, like the Better Not Younger product.

Glam Girl Gabi, who works with Better Not Younger, recommended the Purple Brightening Shampoo For Gray and White Hair.

But, there are many other brands in the UK which sell purple hair products that won’t break the bank.