Your skin is repairing UV damage every single day, but what happens when that repair slows down with age? In this episode of The Biology of Skin Aging, we’re going inside your skin cells to understand DNA repair enzymes, UV damage, photolyase, p53, and why one sunscreen ingredient is different from normal SPF. UV light can create tiny errors in your DNA called CPDs, or cyclobutane pyrimidine dimers. Your cells usually repair this damage through nucleotide excision repair, but with age and repeated sun exposure, that repair system becomes slower and less efficient. And then there is photolyase, the DNA repair enzyme that humans lost, but many plants, bacteria, fish, birds, reptiles, and marsupials still have. Unlike normal sunscreen, which helps block UV before it reaches your DNA, photolyase can help reverse specific UV damage that has already happened. In this video, we’ll talk about: • What UV actually does to your DNA • How your skin repairs UV damage • Why p53 is like the quality inspector of your cells • What photolyase does differently • Why humans lost the photolyase enzyme • How photolyase sunscreens like Eryfotona work • Why DNA repair becomes more important as skin ages This is not just about wrinkles. This is about how your skin protects itself from mutation build-up, photoaging, and long-term sun damage. If you’re interested in sunscreen science, mature skin, skin aging, DNA repair, photolyase, and evidence-based skincare, this episode is for you. Subscribe for more episodes in The Biology of Skin Aging series. DISCLAIMER: This video is for educational purposes only and is not personal medical advice. Always speak with your own doctor or dermatologist about your individual skin concerns, especially if you have a history of skin cancer, actinic keratoses, or photosensitivity disorders. -- LINKS -- (When available, I use affilliate links and may earn a small commission). *Shop everything mentioned in this video here: https://shopmy.us/collections/5859409 ISDIN | Eryfotona Actinica Ultralight Mineral Sunscreen SPF50+: https://go.shopmy.us/p-65214757 ISDIN | Eryfotona Ageless SPF 50 : https://go.shopmy.us/p-65214766 MEDIK8 | Advanced Day Ultimate Protect Age-Defying Moisturiser with Photolyase SPF 50+ PA++++ 50ml: https://go.shopmy.us/p-65215700 Avea | Longevity Supplements | Use Code LINDABRAND for 15% Off!: https://go.shopmy.us/p-65216591 SKINCEUTICALS | Phloretin CF with Ferulic Acid Serum 30ml: https://go.shopmy.us/p-65215866 e.l.f. SKIN | Bright Icon Vitamin C + E + Ferulic Serum: https://go.shopmy.us/p-65216500 MEDIK8 | C-Tetra Advanced: https://go.shopmy.us/p-65214981 MEDIK8 | Niacinamide Peptides: https://go.shopmy.us/p-65214945 *Shop more of my favorite products here: https://shopmy.us/lindabrandbeauty * Did you know that I have discount codes you can use? Discount Codes: -Allies of Skin | Highly concentrated, supercharged formulas that help you achieve maximal results, in minimum steps. (Code: LINDAB20 for 20% off): https://go.shopmy.us/p-42797426 -AVEA | Longevity supplements with Swiss quality! Ships internationally. (Code: LINDABRAND for 15% off): https://avea-life.com/lindabrand -Laduora | Lumeo SkinLift 4D Current™ Red Light Therapy Kit. Smooth fine lines, lift contours, and energize tired skin - all in just 3 minutes a day. (Code: LINDABRAND15 for 15% off): https://go.shopmy.us/p-37603237 -Skin Type Solutions | Some of the best skincare brands and skincare products in one place (eltaMD, Alastin, SkinCeuticals, Obagi, Allies of Skin, CeraVe, Murad, Osmosis, Plated+++). (Code: LINDABRAND10 for 10% off): https://go.shopmy.us/p-49185985 ============================ Disclaimer: This content is based on my personal experience and professional opinion as a medical doctor and skincare enthusiast. It is not intended to replace medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for personalized medical guidance. Some links may be affiliate links, which means I may earn a small commission at no extra cost to you. This helps support my channel and allows me to continue creating independent, honest reviews. All opinions remain my own. Timestamps: 00:00 Your skin is repairing UV damage right now 00:47 Chapter 1 - WHAT UV DOES TO YOUR DNA 01:47 Chapter 2 - HOW CELLS REPAIR UV DAMAGE 03:35 Chapter 3 - THE ENZYME WE LOST (AND CAN NOW GET BACK) 05:37 Chapter 4 - WHY THIS GETS HARDER AS YOU AGE 06:41 Chapter 5 - WHAT HAPPENS WITHOUT DNA REPAIR 07:33 Chapter 6 - PRODUCTS THAT ACTUALLY REPAIR DNA DAMAGE 09:57 Chapter 7 - EVERY TIME YOU STEP OUTSIDE, YOUR SKIN IS RUNNING REPAIRS YOU NEVER NOTICE ============================ SOCIAL MEDIA: TikTok: @lindabrandbeauty Instagram: linda.brand.beauty Facebook: lindabrandbeauty #lindabrandbeauty email: lindabrandbeauty@gmail.com (business inquiries) Address for PR: Linda Brand 6519 Governor Printz Boulevard, C-554522 Wilmington, DE 19809 USA #skincare #makeup #lindabrandbeauty

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