The former Beatle showed all the signs of the eating disorder but because he was never diagnosed with the disease went untreated in his years of fame.
At the height of Beatlemania the singer's weight fluctuated wildly. But when he was shot dead in 1980 outside his New York apartment he had lost a huge amount of weight.
Author Debra Sharon Davis claims in her book "BackStage Pass VIP" that Lennon suffered from food fetishes and loved bowls of Rice Crispies topped with ice cream.
She said the singer kept bowls of snacks hidden away at his various homes and "fantasised" about foods.
Davis claims Lennon was always hungry, loved to eat but "hated the feeling of being full" so he would often force himself to vomit after eating.
"Lennon was surrounded by talented musicians, but many had drinking and drug problems – so it was hard for them to see Lennon's purging behaviour as extraordinary.
"One must also realise that at that time the public and the media were unaware of bulimia as an addiction and health risk – which made it all the more frightening for John Lennon. He literally had no point-of-reference on what he was experiencing."
The book, which looks at the private lives of rocks stars from the 1960s and 1970s, includes an interview with the singer Harry Nilsson who said he noticed Lennon had a problem with food.
"John and I were having a heart-to-heart," recalled Nilsson prior to his death in 1994.
"Then all of a sudden John went off about how powerful men had ravenous appetites and wanted to swallow the world whole. And he thought that was why he had this horrible problem – being hungry all the time and overeating."
Overeating, or bingeing, is a symptom of bulimia, a disease that affects mostly women. Princess Diana admitted she suffered from bulimia brought on from the stress of her unhappy marriage.
The book also reveals that Mick Jagger was a closet conservative who asked his wife to wear a bra under her see through top to avoid embarrassing his mother.
The book's author spent weeks travelling with the Rolling Stones during the 1980s, interviewing Mick Jagger's friends and fans to get a detailed insight into his life.
She claims he was a closet conservative who asked his wife to wear a bra under her see through top to avoid embarrassing his mother.
The Rolling Stone also liked to have his eggs served soft boiled in a Wedgwood cup.
Davis said the singer would bring his parents flowers during visits and on one occasion asked his then wife Bianca to wear a bra when his mother made a surprise visit.
She writes:"Bianca refused, stormed out and Jagger was left to nervously fix a tray of tea and spread a bunch of pastries on a doily to cater to his mum."
The book also contains details of the legendary meanness of Jagger and includes an anecdote of how he once checked on the price of pencil sharpeners used in the Stones’ office.
Davis, who runs the LA based Davis Communications Group, is a marketing and communications strategist who specialises in advising clients,including Fortune 500 companies, on pop culture.