The honour was "pretty sweet", Dixon said.
"Wheaties is iconic. To be on that box, there's only a few sportspeople who ever get the chance to do it."
Dixon has also been on the cover of a Froot Loops-type cereal, the ring-shaped Vrooms. He has also featured in ads for products as diverse as Gillette razors, Vaseline Men's Care and adult nappies.
"The worst one was the Depend adult diapers."
Dixon is feeling a lot better about SOS, a rehydration drink co-founded by Kiwi-based former British track athlete Tom Mayo, an old friend of Dixon's wife Emma, a former British 800m champion.
Dixon is an investor in the company, which has major contracts with pharmacy giants Boots and CVS. Virgin boss Richard Branson stocks SOS on his Caribbean island for his guests.
Dixon's reasons were altruistic and selfish, he said. "It's something I need but to see it hopefully prosper as well would be great."
As for the future, the 34-year-old will live in the US for now, Europe or Australia next and, in perhaps 15 or 20 years, New Zealand.
The country was "absolutely" still home -- for one, the US just wasn't meeting his pie needs.
"That's the first stop I make, to get a Big Ben's mince 'n' cheese."