Q&A on the most talked-about set of supplements from 2019: NAD+ and its precursors, most notably NR and NMN. We also included a buying guide for identifying safety & quality in supplements.

Elon Musk is going to save our species.

Tiago Forte is the founder of Forte Labs.

Chris Masterjohn holds a PhD in Nutritional Sciences from the University of Connecticut and has a world-class understanding of the intricate relationship between diet, genetics, and other important health factors.

Matt Ball is the former Global Head of Strategy for Amazon Studios. He's currently a venture capitalist focused on interactive media.

A full summary of Naval Ravikant's 2019 Periscope sessions and podcast appearances.

Shane Parrish is the creator of the Farnam Street blog and host of The Knowledge Project podcast.

Pat Brown is the founder and CEO of Impossible Foods, the plant-based meat company on a mission to forge a better environmental future for all.

Kapil Gupta returns to The 33voices Dialogue to pick up his ongoing chat with Moe Abdou.

Sal Di Stefano is a personal trainer and one of three hosts of the Mind Pump podcast.

This episode is a replay of a live Q&A Tim hosted for supporters of his podcast during a brief experiment in which he got rid of sponsors.

Dr. Will Cole is leading functional-medicine expert who specializes in the underlying factors of chronic disease. He's the author of "The Inflammation Spectrum."

David Sinclair is a Professor in the Department of Genetics at Harvard Medical School and author of the new book, "Lifespan: Why We Age and Why We Don't Have To."

This post features the Podcast Notes from all episodes of Derek Sivers' new podcast.

Charles Schwab is the founder and chairman of the Charles Schwab Corporation and author of "Invested: Changing Forever the Way Americans Invest."