Sunscreen is not just about slapping on some lotion and calling it a day. While it’s a crucial part of our daily skincare routine, many of us are using it incorrectly. The American Academy of Dermatology notes that people often underestimate the importance of sunscreen, not understanding how to apply it properly or what it’s even meant to do. Think of SPF like a clingy friend: it needs attention every two hours or it stops doing its job. As Mona Gohara, MD, a board-certified dermatologist at Dermatology Physicians of Connecticut, puts it, “SPF ratings are determined under very specific conditions—namely, two milligrams of sunscreen per square centimeter of skin.” This means that using too little sunscreen can leave your skin unprotected. In fact, studies show that most people only apply 25 to 50 percent of the recommended amount they need. This is especially true for mineral sunscreens, which require a generous application to work effectively. “The level of protection does not increase linearly,” notes Dr. Brian Hibler, MD, a board-certified dermatologist at Schweiger Dermatology. Instead, SPF 15 blocks 93 percent of UVB rays, while SPF 30 blocks 97 percent, and SPF 50 blocks 98 percent. So, how can you ensure you’re using sunscreen correctly? Here are some common mistakes to watch out for and how to fix them:
- Using too little sunscreen
- Relying on makeup with SPF as a primary source of protection
- Applying sunscreen after being outside
- Forgetting to use sunscreen on hard-to-reach areas, like the scalp and hairline
- Not reapplying sunscreen frequently enough
- Misusing spray sunscreen
- Using expired sunscreen
- Not layering on UPF-rated clothing for added protection
Common Sunscreen Mistakes
You Don’t Use Enough Sunscreen
Studies show that most people only apply 25 to 50 percent of the recommended amount they need. This is especially true for mineral sunscreens, which require a generous application to work effectively. To fix this, use about a half teaspoon of sunscreen for your face and neck, and one ounce for your full body. For general protection, stick with at least SPF 30, or SPF 50 for better peace of mind.
Relying on Makeup with SPF
“Makeup with SPF isn’t the same as sunscreen—period,” Dr. Mona Gohara says. In a pinch, it’s better than nothing, but most of these products often have a lower SPF, and unless you’re applying a big, nickel-sized dollop of foundation in thick, even layers, you’re probably not getting the protection you think you are. To fix this, always apply a dedicated broad-spectrum sunscreen (SPF 30 or higher) as the final step in your skincare routine before putting on any makeup.
You Apply Sunscreen After Being Outside
“Mineral-based sunscreens start to work immediately, but chemical sunscreens need time to absorb to work their magic,” says Dr. Mona Gohara. Chemical sunscreens work like a sponge: “They soak up UV radiation, convert them into heat, and then release that heat from your skin, so the UV rays don’t damage your cells.” This means applying them before exposure is key, at least 15-20 minutes prior, Dr. Hibler says.
You Forget to Use SPF on Hard-to-Reach Areas
Don’t overlook your scalp, hairline, hands, and feet, as Dr. Hibler notes: “Skin cancer can occur [there] as well.” To fix this, apply SPF generously to these areas. For extra protection, try using a powdered sunscreen or lip balm with SPF.
You Don’t Reapply Sunscreen
Sunscreen should be reapplied every two hours, especially if you’re outdoors or after sweating or swimming, Dr. Hibler says. Make it easy on yourself by keeping a portable sunscreen in your bag for easy touch-ups.
You Misuse Spray Sunscreen
Remember, you still need a shot glass worth of sunscreen for your full body, even if it’s a spray formula. To fix this, apply your spray sunscreen generously and in an even layer, and spray until you see your skin glisten. Always apply directly to your skin, not into the air.
You Use Expired Sunscreen
“Sunscreens should have an expiration date on the bottle; if it does not, assume it has expired after three years if it has been stored properly,” Dr. Hibler says. To fix this, invest in a new bottle to properly protect your skin.
You Only Rely on Sunscreen, Not Clothing
Incorporating UPF-rated clothing into your routine can significantly enhance your protection by forming a barrier against the sun’s rays. Look for fabrics with high UPF ratings, like polyester and nylon, and layer on long-sleeve shirts, hats, and sunglasses for added protection.
| UPF Rating | Product |
| 30 | Polyester long-sleeve shirt |
| 50+ | Nylon hat |
Best Sunscreens for Tan to Deep Skin
For Melanated Skin
Mineral sunscreens are more likely to leave a white cast, so a chemical sunscreen might be a better choice. Look for tinted sunscreens with iron oxides for added protection and to help block visible light.
- Neutrogena Sheer Zinc Dry-Touch Sunscreen, SPF 50
- La Roche-Posay Anthelios Melt-In Sunscreen Milk, SPF 60
- EltaMD UV Sport Broad-Spectrum SPF 50
For General Use
For general protection, stick with at least SPF 30, or SPF 50 for better peace of mind. Look for broad-spectrum sunscreens with high SPF ratings and a water-resistant formula.
- EltaMD UV Clear Broad-Spectrum SPF 46
- CeraVe Sunscreen Lotion, SPF 50
- La Roche-Posay Anthelios Melt-In Sunscreen Milk, SPF 60
Conclusion
Sunscreen is not just about slapping on some lotion and calling it a day.
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