How did Luffy become immune to poison in One Piece?

Luffy's journey to poison near-immunity happens very much on-screen in the sprawling anime 'One Piece.' And he nearly dies because of it.

How do you think Luffy would approach a rematch with Magellan? : r

How did Luffy survive Magellan's Poison Diarrhea? - Quora

Magellan, One Piece Wiki

How does Luffy beat Magellan in One Piece (anime)? - Quora

One Piece: Is Luffy Completely Immune to Poison? Explained!

One Piece – Impel Down Arc / Recap - TV Tropes

People really need to remember that Luffy's power is 100% earned

Everytime Luffy got poisoned : r/OnePiece

One Piece (season 16) - Wikipedia

Is One Piece's Luffy Immune to Poison?