How Much Sunscreen to Apply
5 min read
APRIL 29, 2024 - BY THE ONESKIN TEAM
SKIN CARE
How Much Sunscreen to Apply
5 min read
APRIL 29, 2024 - BY THE ONESKIN TEAM
SKIN CARE
You know how important it is to wear sunscreen—it's your best defense against skin cancer, painful sunburns, and premature aging. (1) But did you know that just slapping on any sunscreen might not give you the full protection you need? The amount you apply, the SPF level, and the type of sunscreen all significantly impact the level of protection your sunscreen provides. Interestingly, most people don't use sunscreen correctly, either applying too little or not reapplying throughout the day. (2)
You know how important it is to wear sunscreen—it's your best defense against skin cancer, painful sunburns, and premature aging. (1) But did you know that just slapping on any sunscreen might not give you the full protection you need? The amount you apply, the SPF level, and the type of sunscreen all significantly impact the level of protection your sunscreen provides. Interestingly, most people don't use sunscreen correctly, either applying too little or not reapplying throughout the day. (2)
01
The Recommended Amount of Sunscreen to Apply
To achieve the full benefit of the SPF listed on your sunscreen label, it's essential to apply an adequate amount. The FDA determines the effectiveness of sunscreen based on tests using 2 milligrams per square centimeter of skin. (3) For the average adult, this translates into 1 teaspoon of sunscreen for the face and neck, 1 teaspoon per arm, 2 teaspoons for the torso (covering both the front and back), and 2 teaspoons per leg. (4) While it may be hard to picture these amounts, you likely need more sunscreen than you think.
The Difference Between SPF 30 and SPF 50
Generally, a higher SPF value indicates a higher level of protection against sun exposure. However, there are diminishing returns when it comes to SPF. While SPF 30 filters out about 96.7% of UVB rays, SPF 50 filters out approximately 98%, only a 1.3% difference. (5) Achieving higher SPF ratings typically requires formulations with higher concentrations of active ingredients like zinc oxide, which can leave a more noticeable white cast on the skin. (Read more about using tinted sunscreen to avoid white cast hereto learn more about what is tinted sunscreen.)Many individuals reduce the amount of sunscreen they apply to avoid noticeable white cast. This leads to reduced protection from their sunscreen. Ironically, some users gain more benefits and protections from lower SPFs due to adequate application. For this reason, we've opted for an SPF sweet spot of SPF 30 to maximize your protection while maintaining cosmetic desirability. Both OneSkin’s sunscreens, OS-01 BODY SPF, and OS-01 FACE SPF (formerly OS-01 SHIELD), are powered by our proprietary OS-01 Senescence Blocking Peptide ™, protecting your skin from UV damage while targeting aging at the source. (8,9)
01
The Recommended Amount of Sunscreen to Apply
To achieve the full benefit of the SPF listed on your sunscreen label, it's essential to apply an adequate amount. The FDA determines the effectiveness of sunscreen based on tests using 2 milligrams per square centimeter of skin. (3) For the average adult, this translates into 1 teaspoon of sunscreen for the face and neck, 1 teaspoon per arm, 2 teaspoons for the torso (covering both the front and back), and 2 teaspoons per leg. (4) While it may be hard to picture these amounts, you likely need more sunscreen than you think.
The Difference Between SPF 30 and SPF 50
Generally, a higher SPF value indicates a higher level of protection against sun exposure. However, there are diminishing returns when it comes to SPF. While SPF 30 filters out about 96.7% of UVB rays, SPF 50 filters out approximately 98%, only a 1.3% difference. (5) Achieving higher SPF ratings typically requires formulations with higher concentrations of active ingredients like zinc oxide, which can leave a more noticeable white cast on the skin. (Read more about using tinted sunscreen to avoid white cast hereto learn more about what is tinted sunscreen.)Many individuals reduce the amount of sunscreen they apply to avoid noticeable white cast. This leads to reduced protection from their sunscreen. Ironically, some users gain more benefits and protections from lower SPFs due to adequate application. For this reason, we've opted for an SPF sweet spot of SPF 30 to maximize your protection while maintaining cosmetic desirability. Both OneSkin’s sunscreens, OS-01 BODY SPF, and OS-01 FACE SPF (formerly OS-01 SHIELD), are powered by our proprietary OS-01 Senescence Blocking Peptide ™, protecting your skin from UV damage while targeting aging at the source. (8,9)
02
Applying Sunscreen Properly
When applying sunscreen, the effectiveness relies on quality, quantity, and timing. Ensure that you are using a product that works for your skin, rather than against it.
- Prevent breakouts. If you are worried about using too much sunscreen fearing that it might cause breakouts, select lightweight, non-comedogenic options that won't clog pores. As always, you should perform a patch test with new products.
- Prevent white cast. White cast is common in mineral sunscreens and can be more prominent on darker skin. Look for options that blend in seamlessly, such as OS-01 BODY SPF and tinted and untinted versions of OS-01 FACE SPF.
- Water resistant. Use water-resistant sunscreens certified to last 40 to 80 minutes if you plan to swim or exercise as most conventional sunscreens are not waterproof, especially mineral-based ones. If you are swimming, make sure to reapply after you get out of the water as towel drying removes sunscreen.
- PRO TIP: If you’re looking for a water-resistant sunscreen for your face, try OS-01 BODY SPF on your face. (Making sure to perform a patch test first, as always!) Though OS-01 FACE SPF was specifically formulated to benefit the thinner skin on your face, both OS-01 BODY SPF and OS-01 FACE SPF are non-comedogenic and gentle on facial skin!
02
Applying Sunscreen Properly
When applying sunscreen, the effectiveness relies on quality, quantity, and timing. Ensure that you are using a product that works for your skin, rather than against it.
- Prevent breakouts. If you are worried about using too much sunscreen fearing that it might cause breakouts, select lightweight, non-comedogenic options that won't clog pores. As always, you should perform a patch test with new products.
- Prevent white cast. White cast is common in mineral sunscreens and can be more prominent on darker skin. Look for options that blend in seamlessly, such as OS-01 BODY SPF and tinted and untinted versions of OS-01 FACE SPF.
- Water resistant. Use water-resistant sunscreens certified to last 40 to 80 minutes if you plan to swim or exercise as most conventional sunscreens are not waterproof, especially mineral-based ones. If you are swimming, make sure to reapply after you get out of the water as towel drying removes sunscreen.
- PRO TIP: If you’re looking for a water-resistant sunscreen for your face, try OS-01 BODY SPF on your face. (Making sure to perform a patch test first, as always!) Though OS-01 FACE SPF was specifically formulated to benefit the thinner skin on your face, both OS-01 BODY SPF and OS-01 FACE SPF are non-comedogenic and gentle on facial skin!
03
Tips for Applying Sunscreen Effectively
Timing matters a lot when it comes to sunscreen application.
- After skincare. Applying sunscreen to your face should be the last step in your skincare routine but applied before makeup.
- Wait 15 minutes. It takes 15 minutes for sunscreen to become effective. So wait before you expose your skin to sun. (5)
- Layer up. For mineral sunscreens, which are more prone to leaving a white cast, especially on darker skin tones, start in layers. Start by applying a layer to one area, move to another area to let it dry, and then return to the first area for an additional layer if necessary. This method ensures an even and adequate application while minimizing the discomfort of a heavy, visible residue. (6)
- Reapply. The most common mistake many make is not reapplying sunscreen throughout the day. If you plan to be outside for long periods you should reapply sunscreen every two hours or as needed, especially between 10 AM and 4 PM when UV radiation is strongest. (7)
03
Tips for Applying Sunscreen Effectively
Timing matters a lot when it comes to sunscreen application.
- After skincare. Applying sunscreen to your face should be the last step in your skincare routine but applied before makeup.
- Wait 15 minutes. It takes 15 minutes for sunscreen to become effective. So wait before you expose your skin to sun. (5)
- Layer up. For mineral sunscreens, which are more prone to leaving a white cast, especially on darker skin tones, start in layers. Start by applying a layer to one area, move to another area to let it dry, and then return to the first area for an additional layer if necessary. This method ensures an even and adequate application while minimizing the discomfort of a heavy, visible residue. (6)
- Reapply. The most common mistake many make is not reapplying sunscreen throughout the day. If you plan to be outside for long periods you should reapply sunscreen every two hours or as needed, especially between 10 AM and 4 PM when UV radiation is strongest. (7)
Related Products
Related Products
Key Takeaways:
- Adequate application is the key to getting the full benefit of the SPF on your sunscreen label.
- Higher SPF values indicate greater protection against UV rays, but the benefits have diminishing returns. For example, SPF 30 blocks about 96.7% of UVB rays, while SPF 50 blocks about 98%, only a slight increase. Therefore, SPF 30 is often recommended as a balance between effective protection and minimal white cast.
- Most people fail to apply enough sunscreen or don’t reapply it frequently enough. Sunscreen should be reapplied every 80 minutes to 2 hours, especially during peak sunlight hours.
- For mineral sunscreens prone to leaving a white cast, applying in layers allows the sunscreen to dry and settle between applications, reducing visible residue and ensuring more even coverage.
- Sunscreens like the OS-01 BODY SPF and OS-01 FACE SPF, offer additional benefits including our OS-01 peptide scientifically proven to reduce the visible signs of aging induced by UV exposure.
Key Takeaways:
- Adequate application is the key to getting the full benefit of the SPF on your sunscreen label.
- Higher SPF values indicate greater protection against UV rays, but the benefits have diminishing returns. For example, SPF 30 blocks about 96.7% of UVB rays, while SPF 50 blocks about 98%, only a slight increase. Therefore, SPF 30 is often recommended as a balance between effective protection and minimal white cast.
- Most people fail to apply enough sunscreen or don’t reapply it frequently enough. Sunscreen should be reapplied every 80 minutes to 2 hours, especially during peak sunlight hours.
- For mineral sunscreens prone to leaving a white cast, applying in layers allows the sunscreen to dry and settle between applications, reducing visible residue and ensuring more even coverage.
- Sunscreens like the OS-01 BODY SPF and OS-01 FACE SPF, offer additional benefits including our OS-01 peptide scientifically proven to reduce the visible signs of aging induced by UV exposure.
References
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6773941/
- https://pubmed.ncbi.nlm.nih.gov/12374537/
- https://www.fda.gov/regulatory-information/search-fda-guidance-documents/labeling-and-effectiveness-testing-sunscreen-drug-products-over-counter-human-use-small-entity
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4577364/
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3460660/
- https://www.webmd.com/beauty/how-to-find-sunscreens-without-a-white-cast
- https://pubmed.ncbi.nlm.nih.gov/30273065/
- Based on data from clinical studies and/or lab studies conducted on human skin samples, 3D skin models, and skin cells in the OneSkin lab. Explore more at oneskin.co/claims.
- https://www.nature.com/articles/s41514-023-00109-1
References
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6773941/
- https://pubmed.ncbi.nlm.nih.gov/12374537/
- https://www.fda.gov/regulatory-information/search-fda-guidance-documents/labeling-and-effectiveness-testing-sunscreen-drug-products-over-counter-human-use-small-entity
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4577364/
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3460660/
- https://www.webmd.com/beauty/how-to-find-sunscreens-without-a-white-cast
- https://pubmed.ncbi.nlm.nih.gov/30273065/
- Based on data from clinical studies and/or lab studies conducted on human skin samples, 3D skin models, and skin cells in the OneSkin lab. Explore more at oneskin.co/claims.
- https://www.nature.com/articles/s41514-023-00109-1
Reviewed by Alessandra Zonari, PhD, Chief Scientific Officer (CSO) and Co-Founder of OneSkin
Alessandra earned her Master’s degree in stem cell biology, and her PhD in skin regeneration and tissue engineering at the Federal University of Minas Gerais in Brazil in collaboration with the 3B’s Research Group in Portugal. Alessandra did a second post-doctoral at the University of Coimbra in Portugal. She is a co-inventor of three patents and has published 20 peer-reviewed papers in scientific journals.
Reviewed by Alessandra Zonari, PhD, Chief Scientific Officer (CSO) and Co-Founder of OneSkin
Alessandra earned her Master’s degree in stem cell biology, and her PhD in skin regeneration and tissue engineering at the Federal University of Minas Gerais in Brazil in collaboration with the 3B’s Research Group in Portugal. Alessandra did a second post-doctoral at the University of Coimbra in Portugal. She is a co-inventor of three patents and has published 20 peer-reviewed papers in scientific journals.
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Sun Damaged Skin: What it is, how you can prevent ...
A Comprehensive Guide to Understanding the Differe...
How to Strengthen Your Skin: A Guide to Thicker, H...
An In-Depth Look at Glycerin: What is it and What ...
Exploring the Benefits of Glycerin for Skin Health
Exploring the Difference Between Hydrating and Moi...
3 Natural Ways to Keep Your Skin Hydrated and Glow...
How To Create A Hydrating Skin Care Routine For Dr...
Senotherapeutics, Senolytics, and Senomorphics -- ...
Cleansing 101: How to Wash Your Face the Right Way...
4 Essential Face Cleansing Steps to Achieving a Ra...
Scientific Breakthrough: OneSkin’s scientists show...
Dry Skin 101: How To Identify This Skin Type
How OS-01 Can Help Your Collagen Levels As You Age...
Developing a Skin Care Routine for Normal Skin: 4 ...
What is Normal Skin & Do I Have This Skin Type?
A Step-by-Step Guide to Creating the Perfect Skin ...
Understanding Oily Skin: Causes & Characteristics
7 Keys to Understanding Menopause and Skin Changes
Is This The Root Cause of Aging?
UV Damage Increases Cellular Senescence. Here's Ho...
Our Research Has Been Published in npj Aging
How To Reduce Hyperpigmentation by Targeting Cellu...
4 Steps to Crafting the Perfect Skin Care Routine ...
A Comprehensive Guide to Understanding and Managin...
An In-Depth Look At The Benefits Of Moringa Oil Fo...
How to Tighten the Skin Under Your Eyes
7 Causes For Crepey Skin Under Eyes
101 Guide To Restoring Dry Skin Around The Eyes
How is OS-01 EYE different from OS-01 FACE?
How to Remove Lingering Dead Skin Cells On the Fac...
Safe Beauty, Validated: Why OneSkin trusts SkinSAF...
Hallmarks of Aging
What is Sensitive Skin?
Tight Feeling Skin: 3 Reasons Why
3 Skin Tightening Ingredients To Help Boost Skin H...
How OS-01 Works on Mature Skin
Is Fragrance Bad for Your Skin?
Are Parabens Bad for Your Skin?
Target Cellular Senescence with the Highest Concen...
Can a Plant-Based Diet Really Increase Your Health...
Eye Skin Ages Faster: Here’s How OS-01 Can Help
Gut Health and Skin: How Are They Connected?
How OS-01 EYE Supports the Ultra-Thin Skin Around ...
The Science Behind Why The Skin Around the Eyes Ag...
How Do You Know When to Stop Using Retinol?
How To Heal Skin From Picking Your Face Too Much
6 Factors That Contribute to Slow Skin Healing
4 Foods To Avoid During Wound Healing & Why
A Complete Guide to the 4 Stages of Wound Healing
Collagen And Elastin: What Role Do They Play In Sk...
What is the Function of Skin as a Protective Barri...
Why We Want Skin To Be More, Not Less
More Than Skin Deep: How Physical Touch Predicts L...
What is Skin Inflammation? What Causes it?
How to Reverse (or Prevent) Aging Skin
Yes, You Need Sunscreen During Winter
Can You Use Hyaluronic Acid with Retinol?
Exploring the skin’s purpose in whole-body health
Stressed Skin: 4 Stress Effects on the Skin
What Does Hyaluronic Acid Do For Your Skin?
Good Genes vs. Good Habits: Which Impacts Your Lon...
How Does Sunscreen Work? How Long Does it Last?
What is the Best Skin Care Regimen for Aging Skin?
What happens to skin as a person ages?
What Causes Dark Circles Under and Around Your Eye...
How to Brighten Eyes and Under-Eyes
Invasive vs. Non-Invasive Skincare: The pros and c...
6 Benefits of Jojoba Oil
What are the Benefits of Sulforaphane?
What is Sustainable Packaging for Cosmetic Product...
7 Benefits of Andiroba Oil For Skin
Why is my Skin Peeling on My Face?
What Are The Causes Of Dry, Flaky Skin On Your Fac...
PREP enhances the effects of OS-01 FACE, and the p...
This is the Data to Look For When Choosing Skin Ca...
Why cellular senescence is more than just one of t...
Allantoin For Skin: A Comprehensive Guide
Ceramides For Skin: Everything You Need to Know
A Simplified Guide To The Different Skin Texture T...
How OS-01 Works With Different Skin Types
How To Smooth Skin Texture On The Face: 4 Expert T...
What Causes Crepey Skin & Can It Be Avoided Altoge...
Does Niacinamide Help With Acne & Scarring?
Skin Microbiome: What It Is, Why it’s Important, A...
What Foods Cause Acne and Which Fight Against It?
The 101 Guide To Understanding Acne-Prone Skin
The Top 4 Prickly Pear Benefits for Skin
What Is Exfoliation & Is It A Necessary Measure Fo...
OneSkin Notable Mention: Dave Asprey's The Human U...
How to Incorporate OneSkin’s OS-01 Topical Supplem...
Clean Beauty: What “clean” really means and why “s...
Retinol 101: Debunking Retinol as the Gold Standar...
Menopause & Skin: What you need to know
Take an Inside Look into Our Cutting-Edge R&D Plat...
101 Guide on The Benefits of Cleansing Your Face
How OneSkin Developed the OS-01 Peptide
Cleanser Vs. Face Wash: Which Should I Reach For?
Five Common Skin Problems Experienced in Perimenop...
You’re only as old as you feel, scientists are fin...
Collagen For Menopause: Why Is It Necessary For He...
Get to Know OneSkin’s Topical Supplements:
...OS-
The Top 3 Benefits of Peptides for Skin
How to Use Peptides In Your Skincare Regimen to Op...
Peptides vs Retinol: Is One Better For Increasing ...
What Is Causing the Uneven Skin Tone On Your Body?
How To Boost Skin Moisture For Your Entire Body Fr...
Three Ways To Extend Your Skinspan Starting With Y...
What Are Free Radicals and How Do They Impact Skin...
The Connection Between Mental Health, Age Percepti...
The Top 6 Best Antioxidants For Skin Health and Lo...
What are Zombie Cells & How Can We Remove Them?
SKIN CARE IS HEALTH CARE: WHY EXTENDING YOUR SKINS...
How chronic stress makes you age faster
What is Epidermal Thickness & Why Does it Matter?
Cell Turnover & Why It Slows As We Age
OneSkin Notable Mention: OneSkin Featured In Tony ...
101 Guide To Skin Tightening + 7 Noninvasive Metho...
How to Reduce Skin Inflammation & Redness
Niacinamide Vs Retinol: How Do They Compare?
What Is Causing the Uneven Skin Tone On Your Body?
Why Is Nutrient Absorption Key To Better Skin Heal...
OneSkin Notable Mention: LifeSpan Episode 6 | The ...
The Top 10 Best Foods for Skin Repair
Skin Hyperpigmentation 101: What It Is & How To Tr...
Are There Dangers of Retinol Cream Use?
What is Skin Elasticity & How Can You Improve It?
Celebrating Black History Month: A Discussion With...
Representation of the Black Community in Skin Care...
Our Story: Learn more about the history of OneSkin...
What Is Senescence & Its Relationship To Aging?
Winter Skincare - How To Prevent Dry Skin this Sea...
Special Announcement: OneSkin to Donate 1% of Sale...
Biological Age: What is Biological Age, Why Does i...
What your skincare routine is missing (Hint. It’s ...
What is a peptide?
Peptides: the first piece of th...
Peptides: the first piece of th...
Where Skin Health Meets Longevity
Health Is The New Wealth
The Correlation Between Sleep and Skin: Why It Mat...
How Relationships, Community, & Social Interaction...
OneSkin launches MolClock, the first skin-specific...
Calorie Restriction And Intermittent Fasting: Eati...
Healthspan: A New Way To Think About Aging