MARC McKee shed a life-changing nine stone in just 10 months on fat jabs, now revealing the injection spot he believes works instantly.
“I was told clearly that if nothing changed, I might not live to see 40,” the 34-year-old podcast host said.
At his heaviest Marc tipped the scales at 23.4 stoneCredit: Jam Press
Since 2024, the podcast host has lost nine stone and now weighs 14.7 stoneCredit: Jam Press
At 23.4 stone, doctors had warned Marc, from Belfast, Northern Ireland, that he was suffering from dangerously and , as well as early signs of damage to his liver, kidneys and heart.
And despite always struggling with his , this was the first time he “stopped being about weight as a ‘lifestyle’ issue and became about survival.”
He explained: “It was no longer about weight or appearance, it was about whether I was going to live a long, healthy life.”
Around the same time as the doctor’s caution, he became an uncle for the first time, and says holding his nephew “changed something” in him.
Marc said: “It made the consequences of doing nothing feel very real.
“I wanted to be present – I wanted to be here for the long term.
“That moment, combined with the medical warning, pushed me to seek proper, medically supported help rather than continuing cycles of dieting that had failed me for years.”
He decided to start taking , specifically , becoming one of the first people in the UK to use a GLP1 treatment in August 2024.
Marc has also made a number of lifestyle changes and is receiving ongoing medical support.
Since 2024, Marc has lost nine stone and now weighs 14.7 stone.
He also believes changing where he injected the drug played a key role in his success.
But “more importantly” than the weight loss, Marc says his “health markers have dramatically improved.”
He said: “My blood pressure and cholesterol have normalised, organ function has been restored, and my cardiovascular risk has significantly reduced.”
Marc says he opted for Mounjaro over dieting as that was “not solving the real problem”.
He said: “I had tried everything: structured diets, calorie tracking, gym programmes, and intense periods of discipline.
Marc was suffering from dangerously high blood pressure and cholesterol, as well as early signs of damage to his liver, kidneys and heart.Credit: Jam Press
He used fat jabs to shed the poundsCredit: Jam Press
“I could lose weight, but I could not sustain it, and the cycles of losing and regaining left me feeling exhausted and defeated.
“When my health started to decline, I knew I needed medical support, not another plan built on willpower.
“Mounjaro felt like a tool that finally addressed what was happening in my body – appetite regulation, cravings, and constant food noise – rather than treating me like I was simply failing at discipline.”
Marc regularly shares his experience with Mounjaro and weight loss online to his more than 400,000 followers.
One video, discussing the best spot to inject the drug, went viral, garnering more than 340,000 views, over 2,000 likes and hundreds of comments.
In the video, Marc said: “I have tried every single injection site – so the stomach, the arm, the leg.
“For me, the leg was the one that felt the most consistent.
“My cravings felt steadier, fewer rough days, just less of that up and down feeling through the week.”
However, Marc added that this can be different for everyone and his advice would be to try different spots and see what works best for you.
He added that injecting in different spots was “one of the biggest learning curves” for him.
He said: “I had injected in my stomach and arms previously.
“The arm never did anything for me personally.
“The stomach was OK at times, but it felt inconsistent.
“For me, the thigh was completely different.
“It gave me almost instant appetite suppression, I had no side-effects, and the results stayed consistent across the full week.
“I think a lot of it comes down to biology and fat distribution.
“This medication is injected into fatty tissue and releases over time, so finding an area with the right amount of fat can make a difference in how steady that ‘release’ feels for you.
“For me, the thigh has always been that place, and I hear so many other people say the exact same thing.”
The 34-year-old believes he found the best injection site for weight lossCredit: Jam Press
Becoming an uncle gave Marc the wake-up call he needed to lose weightCredit: Jam Press
In addition to the helpful tip, Marc spoke about the impact that his weight loss journey has had on his confidence and self-image.
He added: “It has been life-changing, but not just in the way people assume.
“Yes, physically I feel different, but the biggest shift is internal.
“I have more energy, I move more easily, and I feel present in my life again.
“My confidence is not just about how I look and fitting into clothes and brands I never could have before, it is about feeling like I have control back, like my body is not fighting me every day, and like my future is not shrinking.
“It has given me peace. And that is something I did not expect.”
Marc now regularly shares his experience with Mounjaro and weight loss onlineCredit: Jam Press The 7 fat jab mistakes stopping you losing weight
WHILE weight loss jabs have been hailed as a breakthrough in helping tackle Britain’s obesity crisis, some users say they’re missing out on their waist-shrinking powers – and it could be down to some simple mistakes…
POOR PENMANSHIP
Many people don’t correctly use the injection pen, according to Ana Carolina Goncalves, a pharmacist at Pharmica in Holborn, London.
Make sure to prime your weight loss pen correctly, as per the instructions. If nothing comes out, try again, and if it still doesn’t work, switch the needle or ask a pharmacist for help.
It’s also recommended to rotate injection sites between the abdomen, thigh and upper arm to avoid small lumps of fat under the skin.
TIME IS OF THE ESSENCE
Make sure you’re using the jabs on the most effective day of your schedule.
For example, taking the jab right before a takeaway or party won’t stop you from indulging, says Jason Murphy, head of pharmacy and weight loss expert at Chemist4U.
Weight loss injections need time to build up in your system, so if you’re planning for a heavier weekend, inject your dose mid-week.
MAKING A MEAL OF IT
You may not feel the urge to overeat at mealtimes due to the jabs. But skipping meals altogether can backfire, says Dr David Huang, director of clinical innovation at weight loss service Voy.
If a person is extremely malnourished, their body goes into emergency conservation mode, where their metabolism slows down.
FOOD FOR THOUGHT
A key mistake using weight loss jabs is not eating the right foods.
As well as cutting out and , Dr Vishal Aggarwal, Healthium Clinics recommends focusing on your protein intake.
DE-HYDRATION STATIONS
Dehydration is a common side effect of weight loss injections. But it’s important to stay hydrated in order for your body to function properly.
Dr Crystal Wyllie, GP at Asda Online Doctor, says hydration supports metabolism, digestion, and can reduce side effects like , nausea and .
MOVE IT, MOVE IT
It can be easy to see the jabs as a quick fix, but stopping altogether is a mistake, says Mital Thakrar, a pharmacist from Well Pharmacy.
Exercise helps maintain muscle mass and help shape the body as you lose weight, which may be crucial if you’re experiencing excess skin.
QUIT IT
While there’s the tendency to ditch the jabs as soon as you reach your desired weight, stopping them too soon can cause rapid regain.
Mr Thakrar recommends building habits like healthier eating during treatment for sustaining results.
Eze Chidiebere Paul
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