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From donating the £1.2 million he received from selling his 2011 European Golden Boot to fund building a number of schools in Gaza, to reportedly donating £5 million to Save the Children's disaster relief fund after the Nepalese earthquake in 2015 - his efforts are certainly admirable.
Stories continue to emerge about Cristiano doing good deeds around the world, and one of those is that he regularly donates blood.
In fact, he is so devoted to giving blood that he refuses to get any tattoos so he can donate more frequently.
Those with tattoos can give blood, of course, but they can't do so immediately after because there's a risk of infection.
Guidelines currently state that donors should wait just four months to give blood after getting a tattoo, which may suggest that the former Manchester United player donates on a very regular basis.
Ronaldo used his global fame to try and inspire young people to save lives:
"We can all make a difference by donating blood. Each donation can benefit up to three people in emergency situations and for long-term medical treatments." he said in 2015 via Eurosport.
"That's why I am enthusiastic, to the importance of blood donation and to encourage people around the world to become lifelong blood donors and help save lives."
It also emerged that Ronaldo is a bone marrow donor after witnessing the struggles of a teammate's child.
"It was the time when Carlos [Martins] was with us on the national team. He told us about the problem with his son and we, the players, showed great unity to help him and his son because we knew it was a very complicated situation," Ronaldo told radio station Cadena Cope.
"[Donating bone marrow] is something a lot of people think is a difficult thing to do but it's nothing more than drawing blood and doesn't hurt.
"I did it many years ago and if I had to do it again I would because this is a very serious disease for many children and we need to help them."
Fair play, Cristiano. You are saving so many lives in the process.
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