DR Alex George has said losing his 19-year-old brother Llyr has meant that he's doing 'everything in his power' to help other mental health sufferers.
It comes after the frontline doctor, 30, revealed the heartbreaking news that his sibling had passed away after his own mental health battle in July.
The reality star has teamed up with organisation Scape to take part in their Fresher & Healthy campaign, making it his mission to get people, especially students, openly talking about if they don't feel okay.
"Mental health is an illness and when you lose someone you love to that illness it encourages you to do everything in your power to ensure people see it and treat it in that way," Alex told MailOnline.
"As an A&E doctor, it is very important to me to make sure people are aware that they must act if they are experiencing feelings of depression, anxiety or stress."
He added: "No one is alone in their battle with mental health, there are people and organisations that can help.
"It's so important that we get the message out there that young people can and should ask for help if they are not feeling well mentally.
"There is always someone you can speak to whilst at university and it's just making sure that students are aware of the resources out there to help them.
"For instance at Scape, there is always somebody to talk to, be it the reception team (who are mental health trained) or Scape's Wellbeing Manager.
"There is also an app that students can use to ask for help from the comfort of their own room.
"Helping young adults to feel safe, by providing them with the correct medical insights and practical health advice, is an area I'm very passionate about personally."
Taking to Instagram earlier today, he told his 1.5m followers to prioritise taking time out for themselves and their mental health.
He wrote: "I'm sure I'm not alone in feeling like the world can really get on top us at times.
"So often, our days fly by, running around and chasing our tails, trying to get everything done.
"Today was definitely one of those days for me, but I decided to slow down, get my coat on and get outside for a long walk. And now I feel so much better.
"No matter how hectic life gets, take time for you and your mental health. Breathe 💙"
Alex paid tribute to the "kindest" little brother, who was 10 years younger, and due to start medical school next month to follow in his big sibling's footsteps, just two months ago.
A heartbroken Alex wrote on Instagram: "I can’t believe I am actually writing this post.
YOU'RE NOT ALONE
EVERY 90 minutes in the UK a life is lost to suicide.
It doesn't discriminate, touching the lives of people in every corner of society - from the homeless and unemployed to builders and doctors, reality stars and footballers.
It's the biggest killer of people under the age of 35, more deadly than cancer and car crashes.
And men are three times more likely to take their own life than women.
Yet it's rarely spoken of, a taboo that threatens to continue its deadly rampage unless we all stop and take notice, now.
That is why The Sun launched the You're Not Alone campaign.
The aim is that by sharing practical advice, raising awareness and breaking down the barriers people face when talking about their mental health, we can all do our bit to help save lives.
Let's all vow to ask for help when we need it, and listen out for others... You're Not Alone.
If you, or anyone you know, needs help dealing with mental health problems, the following organisations provide support:
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"I have lost my beautiful little brother to mental health. I love you so much Llŷr. The kindest and most caring soul.
"I was so proud of you starting medical school next month, you would have been the most incredible doctor.
"We are hurting so bad. No words can explain.
"As a family we are devastated. We love you and miss you so much. Please rest in peace x Our boy."