New reports have emerged regarding Essendon's infamous supplements saga from The Herald Sun. 

It states that the drug administered to players that led to their suspensions in 2016 were only listed as a banned substance several months after the injections were stopped.

A total of 34 Bombers and coach James Hird were banned for 12 months after a court ruled that the players were injected several times with the banned substance Thymosin Beta-4.

In addition, the club were fined $2 million, revoked of their opportunity to play in the 2013 finals series.

However, the drug was only deemed to be prohibitive on February, 2013, months after the players had stopped receiving injections.

The Herald Sun obtained the information under Freedom of Information laws.

"An ASADA official ran a check on the public site for "research" at 10.34am and no flag was generated for Thymosin Beta-4," the newspaper report said.

"Another check on Thymosin Beta-4 just over two hours later at 12.59pm by an ASADA staffer listed it as 'banned in sport'.

"The status update came on the same day AFL boss Andrew Demetriou called Essendon chairman David Evans about a secret investigation into the club's supplements program, prompting the Bombers to 'self-report' to ASADA."

Scientist Bob O'Dea said: "The evidence of a stitch-up is compelling".