This video showing what cheap shampoo does to your hair has shocked the Internet

Photo credit: Facebook.com/Rachel Trach
Photo credit: Facebook.com/Rachel Trach

From Cosmopolitan UK

Anyone who dyes their hair will know that it's not cheap, so once you've handed over £80 of your hard earned pounds to your hairdresser, who has any money left to fork out on expensive shampoos?

But one beauty salon owner has taken to Facebook to show the apparent damage a cheaper shampoo can do to coloured hair.

Rachel Trach uploaded a video to her Facebook page showing an experiment she carried out with a "salon shampoo" and a "drugstore" version.

For her experiment, Rachel used the Unite 7 Seconds Shampoo, £19.95 and what looks like Tresemmé's 24 Hour Body Shampoo, £5.24.

After pouring each shampoo into a different glass of water, Rachel then added a lock of what appears to be coloured hair.

When she added the lock of hair to the glass with the £19.95 Unite shampoo, the water didn't change colour. But when Rachel adds the lock of hair to the £5.24 Tresemmé shampoo, it appears to immediately strip the dye and turn the water into what looks like a glass of Ribena.

The video has already received a staggering 2.9 million views with a lot of people praising the benefits of using a more expensive shampoo:

While others were quick to come to Tresemmé's defense:

It's worth pointing out that the Tresemmé shampoo used was clear. As a rule of thumb clear shampoos tend to be more clarifying and are therefore not recommended for coloured hair as they can strip the colour. Colour safe shampoos tend to be a cream consistency, meaning they are more moisturising and less damaging for coloured hair. We also don't know when the hair was dyed and what dye was used.

What do you think? Is this enough to encourage you to spend more on your shampoo, or are you happy sticking to your 3 for 2 Boots offer?

We have reached out to Tresemmé for comment.

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