Former Wallaby Anthony Fainga'a retires due to concussion fears

Anthony Fainga'a, centre, played 23 Tests for the Wallabies and helped Queensland to the Super Rugby title in 2011. PA

Former Australia back Anthony Fainga'a has called time on his rugby career over fears for his long-term health as a result of multiple head injuries and concussions.

The hard-tackling centre, who played 23 Tests for the Wallabies and helped Queensland to the Super Rugby title in 2011, has mainly played in Japan since leaving the Reds three years ago.

"I'm probably only one more head knock away from being a vegetable or not being able to play with my kids," Fainga'a, 32, told Fox Sports News on Wednesday.

"After a couple of really big head knocks, I had to make a big decision ... I love the rugby game so much but I needed to look after my mental health."

Fainga'a said the after-effects of his injuries were so severe that he needed help standing up during the wedding of his brother and former Wallabies and Reds teammate Saia.

"In 2016, my twin brother got married and at the altar, I was actually getting held up because of the head knocks," he added.

"I received a couple of really big head knocks over my career and I was standing at the altar getting held up, I got walked out by someone."

Fainga'a urged young players suffering from similar issues not to hesitate to quit the game.

"My message would be it's never too early, it's never too late to finish up," he said.

"Everyone loves rugby but it only takes one head knock. The easy decision is to keep playing, the hard choice is to say I'm going to give this up and do something else."