PORT Adelaide defender Alipate Carlile says players trust internal medical and fitness advice and rarely take it upon themselves to check supplements being recommended to them inside the club.

While the 25-year-old denied Power players had ever been asked to sign any sort of waiver form, as former Essendon player Kyle Reimers alleged happened at Windy Hill, Carlile said he and his teammates rarely questioned what was being given to them.

Reimers alleged on Chanel Nine on Tuesday that Essendon requested players to sign waivers taking responsibility for supplements taken as part of the Bombers' 2012 fitness program.

Former ASADA chairman Richard Ings told SEN Radio on Wednesday morning that "being unaware of what you're taking is no excuse" and that "players involved in using performance-enhancing drugs would be liable to prosecution for an anti-doping law violation".

Carlile said: "Sometimes we do (check ourselves), but most of the time we just trust the club doctors, we've got full faith and trust that they'd do everything by the book.

"It gets ticked off at every level and they're all over that.

"Our club doctors are up there with the best in the world as we’ve seen, so we just go on what they've given us."

Port Adelaide has issued a statement saying the club, its AFL-listed player Angus Monfries and SANFL-listed player Henry Slattery would cooperate with investigators probing the Essendon situation.

Monfries and Slattery played at Essendon during the period under investigation before joining Port Adelaide at the end of 2012.