The big numbers were revealed in her column for this week's Star magazine.
It's been a busy time for the Celebs On The Farm star, 25, with four celebrity parties and three days of filming keeping her on her toes.
The unusual diet comes a week after Charlotte revealed her impressive 15lb weight loss on Instagram.
She slimmed down in just four weeks and showed off the results in before and after bikini snaps, admitting she was "blown away" by her speedy transformation.
The Ex On The Beach star posed in two bikinis one month apart, to highlight her newly toned stomach and slimmed-down waist.
Beaming widely for the camera, Charlotte seemed more than confident with her new appearance, after embarking on weight-loss coffee detox.
She wrote in the caption: "I literally can not believe the difference in just 4 weeks actually losing 15lb!
"I am blown away that my body is back looking sexehhh again. I'm not one to lack loads of confidence but it will certainly grow more!"
She added: "Once again thank you @skinnycoffeeclub and I really chuffin recommend you to get on it my darlings!"
Charlotte embarked on the detox ahead of her appearance on Channel 5's The Farm.
The star left viewers in hysterics during Tuesday's episode when she mistook an alpaca for a giraffe, and maintained her glamorous sense of style in the fields.
The show sees the contestants battle it out to be the best farmhand, with the winner announced later this month.
Speaking to the Daily Star, Towie star Megan revealed she and Charlotte formed a friendship on the show due to its grubby nature – worlds away from their usual glamour.
She said: "Me and Charlotte Dawson definitely bonded over the fact that there was no proper shower. We were staying in a caravan and sharing clothes."
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