I was a private chef on superyachts for 17 years. Billionaires want 5 things now that they're more health-conscious.

Chris Demaillet is the founder of Montclair Chef. Courtesy of Chris Demaillet Chris Demaillet, 43, was a private chef to the ultra-wealthy on superyachts for 17 years. He said his clients became more health-conscious over the years. Food upgrades his clients requested included using olive oil. This as-told-to essay is based on a conversation with Chris Demaillet, 43, who is based in Mallorca, Spain. Business Insider has verified his former employment. This piece has been edited for length a...