What actually happens to your brain, and how fast or slow do you age when you become a parent? Dr. Darby Saxbe reveals the surprising science of the "parental brain" and how fatherhood physically reshapes a man's mind, why dads lose grey matter, what really happens to testosterone, and why the "dad bod" might be nature's design. Dr. Darby Saxbe is a professor of psychology and a leading researcher on the neuroscience of parenthood. She is the founder and director of the NEST Lab at the University of Southern California, and is also the author of ‘Dad Brain: The New Science of Fatherhood and How it Shapes Men's Lives’. She explains: ◼ Why a father's brain physically shrinks when you become a dad ◼ Why testosterone drops in new fathers ◼ Why the "dad bod" may signal a more attentive hands-on father ◼ Why men experience postpartum depression ◼ Why raising a child was never meant to be done by two people alone Follow Dr. Darby: Website - https://link.thediaryofaceo.com/6wyEXDT Substack - https://link.thediaryofaceo.com/1iY1VAb Instagram - https://link.thediaryofaceo.com/48ogGf4 TikTok - https://link.thediaryofaceo.com/Bdn7jlF NEST Lab - https://link.thediaryofaceo.com/8PwWwEd You can purchase Dr Darby’s Book, ‘Dad Brain: The New Science of Fatherhood and How It Shapes Men's Lives’, here: https://link.thediaryofaceo.com/2eavkOe You can join her US based ‘Daddy Stroller Social Club’, here: https://link.thediaryofaceo.com/2uWEONI https://stevenbartlett.com/wp-content/uploads/2026/08/DOAC-Dr-Darby-Saxbe-Independent-Research-Further-Reading-1.pdf The Diary Of A CEO: ◼ Join DOAC circle here - https://doaccircle.com/ ◼ Shop The Diary Of A CEO collection: https://thediary.com/collections/shop ◼ Get email updates - https://link.thediaryofaceo.com/5IB1H6E ◼ Follow Steven - https://link.thediaryofaceo.com/AGU9QP4 Sponsors: Shopify - https://shopify.com/bartlett Linkedin Talent Solutions - http://linkedin.com/DOAC Pipedrive - https://pipedrive.com/CEO