Style and Grooming
Mel Robbins x Mayo Clinic Dermatologist: Skin Aging Habits and the Beef Tallow Sunscreen Test (Oct 19, 2026)
What daily habits age your skin faster, according to the Mayo Clinic dermatologist on Mel Robbins' podcast? In the October 19, 2026 episode, Dr. Saranya Wyles, MD, PhD, said skin aging is driven by five things you can work on: sleep, diet and hydration, movement, stress, and the products and treatments you use. She also ran a UV camera test on Mel's arm showing that beef tallow and coconut oil gave no visible sun protection. [1] [2]
Short answer
- The five pillars: sleep, diet and hydration, movement, stress recovery, and topicals and treatments.
- The big test: mineral, chemical and tinted sunscreens all blocked UV on camera. Beef tallow and coconut oil showed no protection.
- The takeaway: sunscreen every day matters more than any trend product.
Who is the guest
Dr. Wyles is a dermatologist and physician scientist at Mayo Clinic who studies how skin connects to aging and health. [2] This summary is based on the episode page and the YouTube transcript.
The UV camera test
This was the most useful five minutes of the episode. Dr. Wyles put five things on Mel's forearm: a mineral sunscreen, a chemical sunscreen, a tinted sunscreen, beef tallow, and coconut oil. Then she scanned the arm with a UV camera app, where protection shows up as a dark line. [1]
- Mineral sunscreen: dark line. Blocking. [1]
- Chemical sunscreen: dark line, even though it rubbed in and was invisible. [1]
- Tinted sunscreen: dark line. [1]
- Coconut oil and beef tallow: no change at all. No protection. [1]
She warned that oils can make you more likely to burn and told people to be careful when these oils show up in "sun" products. [1]
The American Academy of Dermatology's own advice lines up: use a broad-spectrum sunscreen with SPF 30 or higher, and reapply about every two hours when you are outside. [3]
The five pillars, in plain words
Dr. Wyles called them the pillars of "skinspan." [1] Here is what each one means for you.
- Sleep. Skin repairs at night. Short sleep shows up as dull skin and puffy eyes.
- Diet and hydration. Steady meals with protein and plants beat any single "skin food."
- Movement. Exercise helps blood flow, and that helps skin.
- Stress. She talked about stress cues and recovery, not just "stress less."
- Topicals and treatments. Sunscreen first, then a few proven products.
Peptides, red light and menopause
On peptides, she explained they are short chains of amino acids that act "like keys." Some keys open a very powerful door, like GLP-1 drugs. Others open a door that does very little. [1] So the word "peptide" on a jar does not tell you much by itself.
Mel said her face flushes faster in menopause, and Dr. Wyles said redness is very common in perimenopause and menopause. [1]
A simple routine built on the episode (original)
This is our routine, not hers. It follows the pillars and the sunscreen test.
Morning
- Gentle cleanser, or just water if your skin is dry
- Moisturizer
- Broad-spectrum SPF 30 or higher, every day, even if you sit by a window or drive a lot
Night
- Cleanser to remove sunscreen and makeup
- One treatment, like a retinoid a few nights a week, if your skin handles it
- Moisturizer
Weekly habits
- Keep a sunscreen in your car and bag. Dr. Wyles showed a photo of a truck driver with much more sun damage on the side of his face by the window. [1]
- Pick one sleep fix: same bedtime, phone out of the bed.
Common mistakes the episode helps you avoid (original)
- Skipping sunscreen on cloudy days. UV still gets through clouds and windows.
- Putting sunscreen under a thick layer of oil. Oils do not add protection, and the camera test showed oils alone give none.
- Changing products every week. Give any new product about a month before you judge it, unless it burns or itches.
- Chasing a "skin age" number. Apps and scanners are fun, but daily habits are what move skin over months.
What to skip
- Beef tallow or coconut oil as sun protection. The camera showed nothing. [1]
- Buying a product just because it says "peptides."
- Ten step routines. The episode page itself promised help to "simplify" your routine. [2]
How to choose your sunscreen (original)
The camera test showed all three real sunscreen types worked. So pick the one you will actually wear every day.
| If your skin is... | Try | |---|---| | Oily or acne prone | A light gel or fluid chemical sunscreen | | Sensitive or red | A mineral sunscreen with zinc oxide | | Uneven tone or you skip foundation | A tinted sunscreen | | Darker skin that hates white cast | A chemical or tinted formula |
How much: about a nickel sized amount for the face, and do not forget your neck and ears. Most people use far too little, which means less protection than the label says.
When: every morning as the last skincare step, before makeup. If you are outside for hours, reapply.
A 30 day starter challenge (original)
- Week 1: sunscreen every single morning. Put it next to your toothbrush.
- Week 2: add a set bedtime five nights out of seven.
- Week 3: add a walk or workout three days.
- Week 4: take a photo in the same window light as day 1 and compare.
Quick takeaway
Mayo Clinic's Dr. Wyles named five skin pillars: sleep, food and water, movement, stress, and products.
On a UV camera, real sunscreens blocked light. Beef tallow and coconut oil did not.
Daily SPF 30 or higher is the habit that matters most.
"Peptide" on a label is not proof that a product works.