Meder Beauty

Dr. Tiina Meder

You want healthy, glowing skin—but with all the products, trends, and conflicting advice, it’s hard to know what actually works.  Welcome to the Meder Beauty Podcast, hosted by Dr. Tiina Meder, a former cardiologist and board-certified dermatologist. In each episode, we uncover what really matters, break down the science, and give you real, expert-backed skincare advice. Whether you’re looking to achieve radiant healthy skin, curious about anti-aging, or want to understand what’s really in your products, you’re in the right place. Rooted in science and the truth about what your skin actually needs, we’ll have in-depth conversations with leading dermatologists, medical experts, and skincare brand founders to bring you the latest innovations, evidence-based insights, and industry secrets that truly make a difference.

  1. MAR 3

    The Truth About Skin Absorption and Safety

    Send a text Do creams really penetrate the skin? And if they do, how deep and how safely? On the Meder Beauty Podcast, I explain how skincare actually moves through the skin barrier and why penetration is not simply a marketing promise, but a scientific and safety question. I break down the 500 Dalton rule, which ingredients can truly pass through the stratum corneum, and why size, location, and even time of day influence absorption. I talk about peptides, retinol, niacinamide, acids, and the surprising role of water as one of the strongest penetration enhancers. I also explain why over-exfoliation, microneedling, and barrier damage can increase permeability, sometimes in ways that are not beneficial. Penetration should be selective, smart, and controlled. In this conversation, I’ll help you understand what really reaches your skin and what should not. Episode resources: The 500 Dalton rule for the skin penetration of chemical compounds and drugs Learn more from the previous episodes:  Your Skin’s Hidden Ecosystem: Why the Microbiome Matters More Than You Think The Magic of Peptides: Why They’re Transforming Skincare Forever Beyond Retinol: The New Science of Safer, Smarter Skincare Understanding Acne: Myths vs. Science Connect with us: Meder by Dr. Tiina Meder Meder Beauty Instagram Meder Beauty Facebook Meder Beauty TikTok Meder Beauty LinkedIn Meder Beauty YouTube Listen to the Meder Beauty Podcast on Apple Podcasts

    54 min
  2. FEB 17

    Neurotherapy in Skincare: How Skin and Brain Communicate

    Send a text In this episode, I explore the connection between neuroscience, neurotherapy, and skincare, a topic that is finally gaining the attention it deserves. Skin and the nervous system are embryological siblings. They develop together, communicate constantly, and use the same biochemical language throughout our lives. This is why stress, lack of sleep, anxiety, and emotional discomfort can instantly change the way our skin looks and feels. I explain how inflammation, microbiome imbalance, and nervous system overactivation contribute to conditions like acne, rosacea, eczema, and chronic itch, and why irritating or sensitizing skincare can affect not only the skin, but also the brain. This episode is about understanding skin as a communication organ, not just a surface to be treated. When we calm the skin, we calm the nervous system. And that changes everything. Learn more from the previous episodes: Food, Microbiome & Skin: The Forgotten Connection Your Skin’s Hidden Ecosystem: Why the Microbiome Matters More Than You Think The Sensitive Skin Epidemic: What Your Skin Is Trying to Tell You Understanding Acne: Myths vs. Science Episode resources: Laurent Misery - Dermatologist known for research on neurocutaneous interactions and skin neuroscience Connect with us: Meder by Dr. Tiina Meder Meder Beauty Instagram Meder Beauty Facebook Meder Beauty TikTok Meder Beauty LinkedIn Meder Beauty YouTube Listen to the Meder Beauty Podcast on Apple Podcasts

    36 min
  3. JAN 27

    Generational Beauty: What We Learned Before Skincare Went Viral

    Send a text This episode feels like sitting at the table with family stories, laughter, and memories shared across generations. Sarah and I talk about beauty rituals we grew up with. Not trends, not routines from social media, but the habits passed down through families, cultures, and communities. Moisturizing straight after the shower. Cocoa butter, shea butter, Vaseline. Hair rituals that took time and care. Short, clean nails. Fragrance saved for special occasions. Beauty rooted in comfort, protection, and health. We explore how different cultures approach skin, hair, and self-care, from cold northern climates and sauna traditions to Caribbean and Black American beauty rituals centered around hydration, hair, and expression. We talk honestly about how beauty standards were shaped, questioned, and sometimes resisted, from going grey to wearing red lipstick, from straightening hair to embracing natural texture. This is a light, joyful conversation, but also a meaningful one. Beauty rituals are not superficial. They are about connection, memory, care, and learning to listen to your body. A perfect episode to remind us that skincare and beauty were never meant to be rushed; they were meant to be shared. Connect with us: Sarah Drew Instagram Meder by Dr. Tiina Meder Meder Beauty Instagram Meder Beauty Facebook Meder Beauty TikTok Meder Beauty LinkedIn Meder Beauty YouTube Listen to the Meder Beauty Podcast on Apple Podcasts

    33 min
  4. JAN 20

    TikTok Skincare Trends. What Works, What Fails, What’s Dangerous

    Send a text TikTok skincare trends move incredibly fast. One month it’s beef tallow, the next it’s salmon DNA, nano ingredients, or exosomes. Each new idea arrives with urgency and confidence, promising dramatic results and a shortcut to better skin. In this episode, I talk about why these trends feel so convincing, why they rise so quickly, and why they so often disappear just as fast. I explain where the real risks begin, and why many viral ideas raise serious scientific, ethical, and safety questions once you look beyond the headlines. After nearly 30 years in the beauty industry, I have seen this cycle repeat itself again and again. A concept goes viral. It sounds revolutionary. It promises fast change. And then, quietly, it fades away. I also share what does stand the test of time. Peptides. Microbiome-supportive skincare. Biotechnological ingredients. Approaches that focus on skin longevity rather than short-term beautification. This episode is an invitation to slow down, ask better questions, and choose skincare that works with biology, not against it. Episode Resources: Dermal absorption and short-term biological impact in hairless mice from sunscreens containing zinc oxide nano- or larger particles Antagonistic Skin Toxicity of Co-Exposure to Physical Sunscreen Ingredients Zinc Oxide and Titanium Dioxide Nanoparticles Dermal absorption and short-term biological impact in hairless mice from sunscreens containing zinc oxide nano- or larger particles Toxicity and penetration of TiO2 nanoparticles in hairless mice and porcine skin after subchronic dermal exposure Connect with us: Meder by Dr. Tiina Meder Meder Beauty Instagram Meder Beauty Facebook Meder Beauty TikTok Tiina Meder LinkedIn Meder Beauty YouTube Listen to the Meder Beauty Podcast on Apple Podcasts

    40 min
5
out of 5
11 Ratings

About

You want healthy, glowing skin—but with all the products, trends, and conflicting advice, it’s hard to know what actually works.  Welcome to the Meder Beauty Podcast, hosted by Dr. Tiina Meder, a former cardiologist and board-certified dermatologist. In each episode, we uncover what really matters, break down the science, and give you real, expert-backed skincare advice. Whether you’re looking to achieve radiant healthy skin, curious about anti-aging, or want to understand what’s really in your products, you’re in the right place. Rooted in science and the truth about what your skin actually needs, we’ll have in-depth conversations with leading dermatologists, medical experts, and skincare brand founders to bring you the latest innovations, evidence-based insights, and industry secrets that truly make a difference.