Campaigners have accused TikTok of helping children to be ‘brainwashed’ by hosting viral social-media videos that promote changing sex as ‘cool’.

Material posted by transgender influencers on the social networking service – in which they provide advice on transitioning and accessing hormone therapies – has been seen by millions of young viewers.

Some parents are concerned the involvement of TikTok, which became the UK’s most downloaded app last year, is fuelling a ‘social contagion’ of pressure on impressionable youngsters and the rise in teenagers who are identifying as trans.

More than a quarter of British TikTok users are aged between 15 and 25, and children aged between four and 15 who sign up spend an average of 69 minutes on the app each day, according to TikTok’s own data.

The Mail analysed Sunday’s data and found that the #Trans hashtag has been used more than 26 Billion times. 

More than a quarter of British TikTok users are aged between 15 and 25, and children aged between four and 15 who sign up spend an average of 69 minutes on the app each day, according to TikTok’s own data

More than a quarter of British TikTok users are aged between 15 and 25, and children aged between four and 15 who sign up spend an average of 69 minutes on the app each day, according to TikTok’s own data

TikTok entered into a partnership with Stonewall in order to help promote this material.

One popular transgender TikTok influencer, Bella Fitzpatrick, raised £20,000 from followers in less than three months to fund private gender-reassignment surgery. 

She has 700,000. Followers.

Alex Consani (age 18), is another, with more than 680,000 followings. When she was 12 years old, Cosmopolitan published a feature about her life as transmodel. 

One of her videos, seen 2.3 million times, tells followers they are ‘one oestrogen pill away from a glow up’. A ‘glow up’ is a mental, physical and emotional transformation for the better.

Jaison Jowett is an influencer who shows you how to perform reassignment surgery.

One video includes the caption ‘Heal with me after top surgery!’ – a reference to a reconstructive chest operation.

Another video begins with the words ‘I used to be a good Christian kid’ before showing the transformation to a ‘trans, gay atheist who loves tattoos and chaos’.

A channel featuring influencer Jaison Jowett shows the process of transitioning and carrying out reassignment surgery

Jaison Jowett, an influencer shows you how to transition and perform reassignment surgeries.

Last night, Kate Harris, of the LGB Alliance, which opposes Stonewall’s policies on transgender issues, said: ‘Our major concern is that millions of impressionable children are watching these online influencers. 

‘It’s no coincidence that the growth of TikTok coincides exactly with the exponential growth of children presenting with gender dysphoria.’

Ms Harris described some of the videos as ‘deeply frightening’, adding: ‘The message is so often, “Don’t involve your parents.”

‘What these videos would lead a generation of children to believe is that it is easy to change sex and that it is the answer to all of your problems.’

Stephanie Arai-Davies, from Transgender Trend which wants more evidence-based healthcare for children with gender dysphoria, said: ‘It’s hugely influential and it’s full of videos that portray medical transition as cool and edgy. Gender is seen to be the latest rebellion.

‘These social media platforms that promote medical transition should be made to include a warning on such material.’

A spokesman for TikTok said: ‘We are honoured that the LGBTQ+ community has embraced TikTok from our very early days, as a platform for self-expression, education, community-building and joy.’

A spokesman for Stonewall said: ‘Our content allows young LGBTQ+ people to know that they are not alone in their experiences.’