Why is it that some people are fat and some people are thin? It's a question which has fascinated nutritionists, personal trainers and bodybuilders the world over. Frankly, if you're slim and trim, it's easy to exercise what body-positivity activists dub "thin privilege" over overweight people, and assume that their own dietary choices and apathy are entirely to blame for their obesity. It's all too easy to stand at the sidelines and criticise; but the fact of the matter is that sometimes obesity and body fat is a symptom of an underlying problem, and not purely an issue in isolation. If you're struggling with your weight, if you're overeating and don't know how to stop, and if you dread to step on your bathroom scales, then the problem might be more to do with your psychology than your stomach.

Take 25-year-old Georgie Callé; a chronic binge-eater who would routinely chomp her way through 4000 calories a day without breaking a sweat, and spent an unhappy childhood and adolescence failing to beat her own impulse to gorge. But it wasn't until she was diagnosed with obsessive-compulsive disorder in adulthood, that she realised that her self-destructive eating habits were actually her response to the overwhelming fear and anxiety that was ruining her life. Once she dealt with her OCD, she was able to make an incredible body transformation, and now looks completely different.

In a recent interview, in which she opened up about her battles with mental illness and obesity, Georgia stated: "I didn’t understand at the time that I had OCD. I just felt like a horrible person. I’d cross the street to avoid being around people. It affected my concentration at work, my social life – it permeated everything. I felt so alone in my head and tried to control it with binge eating ... From a young age, I was constantly trying to lose weight in one way or another. The heart of the problem was that I was deeply unhappy though."

She said: "I found the space to talk and learn about what was wrong made a massive difference," and explained that, after her OCD became unmanageable, she decided to seek professional help. "The medication was the best thing that happened," she stated, "It reset my brain. I could tell it was finally getting under control when the medication began to work. I could feel a weight lift out my head, giving me space to really embrace the cognitive behavioural therapy. I was still binge eating at this point, but didn’t feel as scared of my condition."

"I looked around and thought, ‘Things are going well for me – why haven’t I got this sorted yet?’” she said. “I’d hear people talking about the gym or healthy eating and realised that it didn’t come naturally to anyone. If I wanted this, I’d have to work hard. I remember seeing a gorgeous Ted Baker dress that never would have fit me, even in the biggest size, so I used that as my motivation."

Georgia decided to take action; she changed her diet completely: sticking to lean meat, fish and veggie curries - cooking her meals herself. She also hit the gym five times a week, and almost immediately saw a massive improvement overall as she shed pound after pound. Now she only weights 11st 9lb (a mere 12lbs away from her target weight) and now intends to take part in the 2019 London Marathon on behalf of The Mental Health Foundation.

Georgia is now keen to spread awareness about obsessive-compulsive disorder, and believes that tackling mental problems should be our first priority when trying to improve our physical health. She stated: "My anxiety and OCD are much easier to deal with. I haven’t felt unwell since I started living a healthier lifestyle. I was really inspired by reading other people’s stories, so I hope sharing mine can help others. My blog keeps me on track, and it’s amazing to see all the lovely messages I receive. To anyone else out there, I’d say lose weight for yourself, not other people, as it’s so important to learn how to love yourself."

I couldn't agree more. If you want to keep up-to-date with Georgia's weight-loss journey, then check out her Instagram blog @inpursuitof healthyness.

Why is it that some people are fat and some people are thin? It's a question which has fascinated nutritionists, personal trainers and bodybuilders the world over. Frankly, if you're slim and trim, it's easy to exercise what body-positivity activists dub "thin privilege" over overweight people, and assume that their own dietary choices and apathy are entirely to blame for their obesity. It's all too easy to stand at the sidelines and criticise; but the fact of the matter is that sometimes obesity and body fat is a symptom of an underlying problem, and not purely an issue in isolation. If you're struggling with your weight, if you're overeating and don't know how to stop, and if you dread to step on your bathroom scales, then the problem might be more to do with your psychology than your stomach.

Take 25-year-old Georgie Callé; a chronic binge-eater who would routinely chomp her way through 4000 calories a day without breaking a sweat, and spent an unhappy childhood and adolescence failing to beat her own impulse to gorge. But it wasn't until she was diagnosed with obsessive-compulsive disorder in adulthood, that she realised that her self-destructive eating habits were actually her response to the overwhelming fear and anxiety that was ruining her life. Once she dealt with her OCD, she was able to make an incredible body transformation, and now looks completely different.

In a recent interview, in which she opened up about her battles with mental illness and obesity, Georgia stated: "I didn’t understand at the time that I had OCD. I just felt like a horrible person. I’d cross the street to avoid being around people. It affected my concentration at work, my social life – it permeated everything. I felt so alone in my head and tried to control it with binge eating ... From a young age, I was constantly trying to lose weight in one way or another. The heart of the problem was that I was deeply unhappy though."

She said: "I found the space to talk and learn about what was wrong made a massive difference," and explained that, after her OCD became unmanageable, she decided to seek professional help. "The medication was the best thing that happened," she stated, "It reset my brain. I could tell it was finally getting under control when the medication began to work. I could feel a weight lift out my head, giving me space to really embrace the cognitive behavioural therapy. I was still binge eating at this point, but didn’t feel as scared of my condition."

"I looked around and thought, ‘Things are going well for me – why haven’t I got this sorted yet?’” she said. “I’d hear people talking about the gym or healthy eating and realised that it didn’t come naturally to anyone. If I wanted this, I’d have to work hard. I remember seeing a gorgeous Ted Baker dress that never would have fit me, even in the biggest size, so I used that as my motivation."

Georgia decided to take action; she changed her diet completely: sticking to lean meat, fish and veggie curries - cooking her meals herself. She also hit the gym five times a week, and almost immediately saw a massive improvement overall as she shed pound after pound. Now she only weights 11st 9lb (a mere 12lbs away from her target weight) and now intends to take part in the 2019 London Marathon on behalf of The Mental Health Foundation.

Georgia is now keen to spread awareness about obsessive-compulsive disorder, and believes that tackling mental problems should be our first priority when trying to improve our physical health. She stated: "My anxiety and OCD are much easier to deal with. I haven’t felt unwell since I started living a healthier lifestyle. I was really inspired by reading other people’s stories, so I hope sharing mine can help others. My blog keeps me on track, and it’s amazing to see all the lovely messages I receive. To anyone else out there, I’d say lose weight for yourself, not other people, as it’s so important to learn how to love yourself."

I couldn't agree more. If you want to keep up-to-date with Georgia's weight-loss journey, then check out her Instagram blog @inpursuitof healthyness.