Ms Stoynova, from Crondall in Hampshire, followed various diets and holistic therapies for two-and-a-half years, which left her emaciated with fluid on her lungs.
Doctors said she was on the verge of death when she was taken to Frimley Park Hospital by ambulance in May last year.
Irena Stoynova (pictured) sought alternatives online and took the advice of a man, who has hundreds of thousands of followers on social media
She was told by Dr Clare Rees that she would likely die without treatment for her cancer
The 39-year-old, who now works in sales, said she did a juice diet for two-and-a-half years. Pictured, Irena's feet swollen and her covered in rashes
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She was told by Dr Clare Rees that she would likely die without treatment for her cancer – which was stage three – but Ms Stoynova continued to refuse for a number of days before finally agreeing to receive chemotherapy.
Ms Stoynova spent 50 days in the hospital's acute dependency unit.
She said when she was first diagnosed that she decided against traditional treatments after 'reading about and watching many doctors and professors talk about the success rate of alternative therapies online'.
The 39-year-old, who now works in sales, said she did a juice diet for two-and-a-half years, but also tried a raw diet, intermittent fasting, boiling herbs and special teas.
Speaking about her diagnosis, she said: 'I was devastated, the whole world just closed around me and I felt really alone.'
She said that she was advised to start chemotherapy, but she turned to the internet to find alternative advice and 'everything started from there'.
She said when she was first diagnosed that she decided against traditional treatments. Irena Stoynova in intensive care unit at Frimley Park Hospital
Photograph showing Irena Stoynova's neck from lymphoma, one week after diagnosis
'I found an American guy who has millions of followers who promoted holistic treatment,' she said.
'He had a podcast where he interviewed very knowledgeable doctors and professors who are talking about holistic treatment and they called standard treatment 'outrageous'.
'They said that people who had chemotherapy are 'lazy' and don't want to put in hard work of holistic treatment.'
Ms Stoynova continued: 'The guy has three or four books on how to heal cancer holistically – how to make salads, use different herbs, juicing, intermittent fasting – there were so many testimonials, so many people that did it.
'I spent £2,000 on juicers – one for smoothies, one for carrots, one for citrus and one for everything else. I spent two to three hours a day making juice for the next day.
'I was fanatic. It was like tunnel vision.'
She added: 'I didn't stop (when I should have), I was just so weak, I had sleep deprivation and hallucinations. I didn't even have the strength to open the door for the delivery man.
'I couldn't breathe because there was fluid on my lungs, I lost about 20 kilograms because of the dieting.'
