Southampton campaigners say it's "unfathomable" how many affected by suicide websites
A Southampton woman who's brother died by suicide a year ago says the "sheer impact is difficult to fathom"
Campaigners in Southampton say it's shocking how many families are being left devastated by pro-suicide websites.
Families from across the country have come together to call for a public inquiry into suicide forums linked to deaths.
Mia-Helena Knight Nikolin Caisley's 17-year-old brother, Vlad Nikolin Caisley, died by suicide last year.
She said: "I knew that the internet was like the wild west.
"I knew that there were dark avenues of the internet and I knew about the dark web, but I didn't know there were suicide forums that actively encouraged suicide.
"I was incredibly shocked when I found out about the forum after and then all of the correspondence on the forum after my brother's death."
The Molly Rose Foundation found 133 deaths were caused by substance.
Mia-Helena's since worked with families and survivors, as well as The Molly Rose Foundation, to prevent online suicide.
She added: "The sheer volume and sheer impact of this forum is difficult to fathom and wrap your head around.
"I feel as though these are preventable deaths and a lot of work needs to be done to prevent these deaths."
Mia-Helena's campaigning for suicide forums to be taken down, parents to be educated on online dangers, poisons to be regulated and for services to have access to antidotes.
She says some services have access to antidotes but feels it's a "postcode lottery".
The government has previously said: “Suicide devastates families and we are unequivocal about the responsibilities online services have to keep people safe on their platforms.
“Under the Online Safety Act, services must take action to prevent users from accessing illegal suicide and self-harm content and ensure children are protected from harmful content that promotes it.
“The substance in question is closely monitored and is reportable under the Poisons Act, meaning retailers must alert authorities if they suspect it is being bought to cause harm.
"We will continue to keep dangerous substances under review to ensure the right safeguards are in place.”
If you need help, you can contact Samaritans by calling 116 123, or through their website.