In this conversation, Douglas Lucas discusses the significance of collagen as a supplement, particularly in relation to bone health and osteoporosis. He explains the types of collagen, their functions, and presents research findings that support the use of collagen supplements like Fortibone for improving bone density. The conversation highlights various studies that demonstrate the benefits of collagen supplementation, including its impact on bone mineral density and overall bone quality, while also addressing the lack of side effects reported in the studies.