"Do exactly as David says, and you will indeed become unstoppable."

“Unstoppable provides a fundamental framework for scaling personal health and happiness, backed by actual research.”

“I don’t know anyone that has spent more time, money, and effort on health optimization than David. In Unstoppable, he gives that knowledge back to the world.”

“David gives you the power to radically transform your health with a simple and approachable framework for thinking about diet, exercise and life.”

“At HubSpot, testing, optimization, and iteration helped us grow consistently and sustainably. In this book, David shows how a similar framework can be applied to the goal of continually improving health and wellness. David's advice is reasonable, straightforward, and most importantly—backed by data.”

“Before you start on the path to a healthier you, save yourself a ton of time and energy and read Unstoppable first. David provides a clear and concise path to getting in the best shape of your life in an efficient way, becoming more productive, and leading the fully optimized life you desire.”