The inspiring runner completed the marathon with type one diabetes.
Callum completed the Edinburgh Marathon(Image: TikTok/TypeOneCallum)
An inspiring Scot completed the Edinburgh Marathon while vlogging about the challenges of a chronic illness.
Callum, who has type one diabetes, completed the marathon on Sunday. He was diagnosed with the condition after he drastically began losing weight and his eyesight “fell off a cliff”.
The influencer shared his story on TikTok, saying: “But here I am today – the fittest I’ve ever been, probably the healthiest I’ve ever been aside from having type one diabetes.” Type one diabetes is a condition where the body cannot produce insulin, the hormone which breaks down sugar to use as energy.
Edinburgh Live reports that as a result, blood sugar levels become too high in the blood and lead to complications.
Throughout his impressive four-hour marathon race, his blood sugar ranged from low to high – showcasing the daily ups-and-downs that come with living with type one diabetes.
For healthy individuals, normal fasting blood sugar levels are between 4.0 to 5.4 mmol/L, and up to 7.8 mmol/L two hours after eating, according to Diabetes UK.
Callum’s ranged from 11.1 mmol/L to much lower.
When Callum was 33km into the race, he shared an update when his blood sugar was at 4.5 mmol/L.
He said: “Thirty-three kilometers in, blood sugar still dropping, so I’m just going to walk for a bit to see if I can level this out because I’ve had so much sugar. Still not going up.”
He completed the race with a time of around four hours, saying: “That was tough” upon crossing the finish line.
The video garnered over 46,000 views in less than 24 hours.
Callum has previously posted on social media saying “Doing any type of long distance running when you have type one diabetes can be pretty annoying due to the amount of extra stuff you have to bring.
“The main things to bring with you are a ton of emergency sugar and to make sure you’re carrying your insulin pen with you.”
He added in his post: “Edinburgh Marathon 2025 with my blood sugar levels throughout.
“I met a lot of other people with type one diabetes as well as a lot of people raising money for it which is always amazing to see.
“It really was a four season kind of day from beautiful sunshine to really heavy winds to rain and hailstones at one point which were absolutely awful. Still good, still happy. I ran a marathon with type one diabetes.”