The Tim Ferriss Show

James Nestor is a science journalist and the author of the international bestseller Breath: The New Science of a Lost Art, with more than three million copies sold in 44 languages.This episode is brought to you by:Helix Sleep premium mattresses: https://HelixSleep.com/Tim (27% off all mattress orders)Momentous high-quality creatine for cognitive and muscular support: https://livemomentous.com/Tim (Code TIM for up to 35% off.)AG1 all-in-one nutritional supplement: https://DrinkAG1.com/Tim (1-year supply of Vitamin D plus 5 free AG1 travel packs with your first subscription purchase.)*Show notes for this episode: https://tim.blog/2025/09/03/dr-dominic-dagostino-all-things-ketones/For show notes and past guests on The Tim Ferriss Show, please visit tim.blog/podcast.For deals from sponsors of The Tim Ferriss Show, please visit tim.blog/podcast-sponsorsSign up for Tim’s email newsletter (5-Bullet Friday) at tim.blog/friday.For transcripts of episodes, go