OJ Simpson has only three months to live as a  result of his extreme case of diabetes and unhealthy lifestyle behind bars.

The combination of ‘sky high’ blood pressure,  a vastly expanding waistline and a lack of physical activity as he serves a  33-year prison sentence have doctors concerned about his health.

Simpson’s lawyer Ozzie Fumo told MailOnline  that he has not heard anything about his clients poor health.

‘As far as I know his health is very good, he  was doing just fine. I just spoke to him on Saturday,’ Mr Fumo said.

‘I spent a lot of time with him preparing for  the retrial motion and he never once mentioned diabetes.

Dangerous weight: The former football star is said to be  topping the scales at around 300 pounds, and his weight increase was on full  show during a May court appearance

‘We discussed health issues, we had meals  together, and he seemed fine,’ Mr Fumo told MailOnline.

The first warning flags were raised when  Simpson appeared at a hearing in May when the former running-back looked much  heavier than he ever had before.

Now The National Enquirer claims that he  weighs 300 pounds and prison doctors have encouraged him to exercise and eat  more healthfully to combat the high blood pressure and diabetes.

Instead, he is listlessly passing the days by  laying in bed in his prison cell and only getting up to get sugar-filled  snacks.

‘OJ’s doctors have told him he could be dead in as little as three months because of his out-of-control blood sugar and blood pressure,’ an unidentified prison friend told The Enquirer.

‘But OJ doesn’t care. He knows he’s never  going to get out of prison, so he refuses to take care of himself.’

The 33-years he faces following a 2008  robbery are not helping motivate Simpson, as he is now making plans for his  death.

He allegedly confessed to murdering his  ex-wife Nicole Brown and her friend Ron Goldman in 1994 and told a prison friend  that he will write a confession letter that will be sent- and then publicly  shared- after he dies.

Mr Fumo countered this claim, saying that in  his months of interactions with Simpson he has ‘never once disparaged the  Goldmans’.

‘In his mind, they’re creditors along with  his children Sydney and Justin,’ Mr Fumo said.

The friends cited by The Enquirer said the  double slaying came in a moment of rage that he regrets to this day because he  still loves Nicole.

He also reportedly tasked his few close  friends with finding ways to hide his remaining $2million in off-shore accounts  so that his son and daughter can access it after his death.

All in the family: O.J. Simpson’s 43-year-old daughter  (right) testified at his May hearing and he is reportedly storing his money in  off-shore accounts so she and his son can have it when he dies

In doing so, he would be in direct violation  with the 1997 court ruling that said he owes Goldman’s relatives $21million  after he was found at fault in a wrongful death civil suit.

He has become even more withdrawn and oddly  behaved- reportedly singing The Wizard of Oz’s ‘If I Only Had a Brain’ to  himself- since the retrial hearing in May.

‘He ignores people when they talk to him and  often wanders around in a glassy-eyed trance. His family is being supportive but  he’s not paying attention to them either,’ one of OJ’s friends told The  Enquirer.

Calls to Simpson’s lawyers were not  immediately returned.

Read more: DailyMail