Carbon Fiber might be good for mast, wings and boards BUT it also looks like one form of carbon is good for human longevity.
If you want to kite surf when you are 150 years old suggest you follow the developments of C60 (ie carbon 60). Just search "C60 in olive oil" and read the latest science. papers out of France. You might also listen to Clif High on the C60 subject at https://www.youtube.com/watch?v=xMJ-gSKP-wM
Light and Frost