

789: The Best Tips for Dry Winter Skin
19/12/2025 | 6 min
On this week's Five Minute Friday, I give you some of my best tips for dry winter skin. Even in Southern California, it isn't uncommon to experience dry skin in the colder months. Cold weather often causes symptoms like itchiness, redness, bumps, and rough patches. I love incorporating moisturizing creams and serums along with scrubs and gentle cleansers to combat these symptoms. In this episode, I go over some of the ways that a good skin care regimen can lessen irritation and increase moisture retention. If you're someone that suffers from dry, irritated skin, this episode is for you! Whether you have sensitive skin or acneic, maintaining your skin's natural mositure barrier will always be key.

788: The Queen Phase: Hormones, Stem Cells, & Sexual Longevity with Dr. Amy Killen
17/12/2025 | 44 min
Join me for an empowering conversation with Dr. Amy Killen, a board-certified emergency physician turned longevity expert, as we explore how women can thrive in their "Queen Phase"—the years following the loss of the protective "estrogen shield" . We dive deep into the nuances of Hormone Replacement Therapy, celebrating the recent FDA updates on estrogen and dispelling myths about testosterone for women . Dr. Killen breaks down the science of stem cells, explaining the difference between autologous (bone marrow/fat) and allogeneic sources, and shares vital red flags to watch for in regenerative clinics . We also discuss the critical link between mitochondrial health and sexual longevity, the potential of peptides like PT-141 and GHK-Cu, and why heavy lifting and sleep are non-negotiable for aging well . Guest Information: Dr. Amy Killen is the Co-Founder of Humanaut Health and the founder of the Human Optimization Project. You can find her at https://biorestoration.com/dt_team/person-01/ and on Instagram @DrAmyBKillen .

787: Holiday Stress and Your Skin: How to Combat Cortisol Face
13/12/2025 | 11 min
This holiday season, Dr. Kay tackles the reality of cortisol face and how stress takes a toll on our skin and beauty. Discover how cortisol affects collagen, triggers acne, causes puffiness, and impacts overall skin health—and learn how to combat it. Dr. Kay shares her tips for managing holiday stress, including skincare routines and lifestyle hacks to keep you glowing. Tune in to unwrap the festive chaos and turn holiday stress into an opportunity for self-love!

786: Biologic Clocks, "Zombie Cells," & The Science of Immune Aging with Dr. Natalia Mitin
10/12/2025 | 58 min
Join me for a fascinating deep dive into the science of immune aging with Dr. Natalia Mitin, founder and CEO of Sapere Bio. We explore why the aging of the immune system is the primary driver of aging for the entire body and unpack the concept of cellular senescence—often called "zombie cells"—where stressed cells persist and create chronic inflammation. Dr. Mitin explains why consumer tests that assign a specific "biological age" in years are often scientifically lacking compared to measuring where you stand within a population's trajectory. We also discuss cutting-edge longevity targets, including T-cell exhaustion (and how drugs like Rapamycin and SGLT2 inhibitors address it), the critical role of gut health (where 70% of the immune system resides), and how mitochondrial function in stem cells can correlate with an extra 15 years of healthspan.

785: Effects on Hormones on the Skin: Navigating Hormonal Changes
05/12/2025 | 13 min
Period, Pregnancy, and Menopause - Ever faced the dreaded "period breakout" or wondered why your skin behaves differently during pregnancy or menopause? Our latest podcast dives deep into how hormones pull the strings of your skin's destiny. From the monthly rollercoaster to the miraculous journey of pregnancy and the graceful transition of menopause, we decode the influence of hormones on your skin. Join us as we uncover the signs, effects, and skincare tips to keep your skin glowing, no matter the hormonal twist and turn



Beauty Bytes with Dr. Kay: Secrets of a Plastic Surgeon™