Your skin from the neck down covers roughly 20 square feet, yet most people reserve their best skincare ingredients for a patch of face the size of a smartphone screen. This episode breaks down peptide body lotions — what they actually contain, how the science works, and why you might be dramatically overpaying for facial serums when body-sized bottles deliver the same cellular technology at a fraction of the cost. Whether you're curious about the difference between Matrixyl and copper peptides or just want to know which products give you real results without the luxury markup, Julian Thorne walks through everything from molecular weights to optimal application timing.

• Peptides are tiny messengers that tell your skin cells what to do. Think of them like text messages sent to your skin's repair crew, instructing cells to make more co ...