Peyton Manning issued a statement Saturday night denying allegations in an Al Jazeera investigative report that an Indianapolis anti-aging clinic supplied him with human growth hormone in 2011.

“The allegation that I would do something like that is complete garbage and is totally made up,” Manning said in the statement. “It never happened. Never. I really can’t believe somebody would put something like this on the air. Whoever said this is making stuff up.”

Manning missed the 2011 season because of four neck surgeries and joined the Broncos as a free agent prior to the 2012 season. The NFL collective bargaining agreement ratified in 2011 banned the use of HGH. However, the league did not begin testing for the substance until 2014. No NFL player has tested positive for HGH.

WATCH: Broncos Week 16 pregame show

According to the Al-Jazeera documentary “The Dark Side,” British hurdler Liam Collins went undercover to expose the rampant use of performance-enhancing drugs in sports. As part of his investigation, Collins met with Charles Sly, a former pharmacist at the anti-aging Guyer Clinic in Indianapolis. Sly said he mailed HGH to Manning’s wife, Ashley, to avoid any link to the quarterback. Collins gained fame in 2009 when he reached the semifinals of “Britain’s Got Talent” as part of the Faces of Disco with his cousin. Collins received a 14-year ban in 2013 for bilking investors in a multimillion property scheme.

In a follow-up interview with Al Jazeera, Sly recanted the allegations, saying they “are absolutely false and incorrect.” Sly said Collins took advantage of him during a vulnerable time in his life following the death of his fiancée.

Ari Fleischer, who heads a sports communications company and is an adviser to Manning, slammed the accusations in an interview with The Denver Post on Saturday night, calling the report “junk journalism.”

“There’s no truth to it,” Fleischer said. “What they have is a well-known con man from England who secretly recorded a former intern.”

Sly was an unpaid intern at The Guyer Institute from February 2013-May 2013, according to Fleischer. This disputes information in the documentary, which says Sly worked at the institute in 2011. Sly confirmed Fleischer’s account, telling ESPN on Saturday that he worked at the institute in 2013, not in 2011 as the Al Jazeera report alleges.

According to Fleischer, Manning was a patient of The Guyer Institute in the fall of 2011 for rehabilitation from neck surgeries. Manning has not been a patient since, Fleischer said.

Manning told ESPN on Saturday night: “Yes, I have been a patient under Dr. Guyer. I have had nutrient therapy, oxygen therapy and other treatments that are holistic in nature but never HGH.”

Sunday morning, The Denver Broncos released a statement on the allegations.

“Knowing Peyton Manning and everything he stands for, the Denver Broncos support him 100 percent,” the statement said. “These are false claims made to Al Jazeera, and we don’t believe the report.”

The statement continues with: “Peyton is rightfully outraged by the allegations, which he emphatically denied to our organization and which have been publicly renounced by the source who initially provided them.”

“Throughout his NFL career, particularly during his four seasons with the Broncos, Peyton has shown nothing but respect for the game. Our organization is confident Peyton does things the right way, and we do not find this story to be credible.”

Manning, 39, has not played since Nov. 15 after exiting in the third quarter against the Kansas City Chiefs following his fourth interception. An MRI the following day confirmed torn plantar fascia in his left foot.