Alex Janin, a WSJ personal health reporter specializing in the booming longevity business, joins Amy Dockser Marcus, a health and science reporter focused on aging research. They dive into the $43 billion longevity industry, discussing trends and consumer demand for life-extending products. They explore the debate over whether humans can live to 100, revealing scientific skepticism about lifespan limits. The conversation highlights the balance between optimistic wellness claims and biological realities, addressing how healthy habits can influence longevity.