With temperatures steadily rising as summer rolls in, one skincare essential is making its way into daily routines and vacation bags: sunscreen. Sunblocks are vital for protecting the skin from sun exposure, including sunburn, premature aging, and, more importantly, skin cancer.
The risks of sun exposure are well documented, with skin cancer accounting for at least 40% of all cancers globally. Scientists have also noted that basal cell carcinoma and squamous cell carcinoma — which together make up 95% of skin cancers — are caused by cumulative, long-term exposure to the sun’s ultraviolet (UV) rays. These statistics highlight the importance of year-round sun protection.
Yet, despite overwhelming evidence, misconceptions about sun protection are still prevalent — especially on social media. From the myth that sunscreen is only necessary in summer to the idea that darker skin doesn’t need SPF, misinformation is everywhere.
So, let’s clear the air! We’re debunking some of the most common SPF myths to set the record straight on sun protection. Let’s dive in.
Myth #1: Higher SPFs Provide Significantly More Protection
SPF ratings can be misleading. For example, you might think that Neutrogena’s Ultra Sheer SPF 60 offers double the protection of CeraVe Hydrating Mineral Sunscreen SPF 30 — but that’s not the case.
👉 A sunscreen with SPF 30 blocks 97% of UVB rays, while SPF 100 blocks about 98–99% — a difference of just 1–2%.
No sunscreen can deliver total UV protection. The SPF rating also doesn’t determine how long the protection lasts — you’ll need to reapply every two hours regardless of the SPF number.
Myth #2: SPF-Infused Makeup Is Enough
Makeup products like e.l.f. SKIN Sunscreen and Makeup Primer or bareMinerals Original Loose Powder Foundation SPF 15 provide some sun protection — but not enough.
Why it’s not enough:
- Most people apply makeup only to their face, leaving areas like the neck and arms unprotected.
- SPF in cosmetics is typically too low and applied too sparingly to offer full protection.
✅ For full protection, always apply a layer of broad-spectrum sunscreen under your makeup and to all exposed areas of skin.
Myth #3: Any Clothing Protects Your Skin from UV Rays
Not all clothing offers equal protection from UV rays. Lightweight, loosely woven fabrics provide minimal protection, while:
- Darker, heavier fabrics with a tight weave offer better protection.
- Clothing with an Ultraviolet Protection Factor (UPF) rating of 30–49 offers good protection, while UPF 50+ is considered excellent.
👉 Opt for UPF-rated clothing, and remember: the more skin you cover, the better the protection.
Myth #4: Sunscreen Causes Vitamin D Deficiency
It’s true that UV exposure helps the body produce vitamin D. However, even high-SPF sunscreens allow 2–3% of UV rays to penetrate your skin — enough to produce adequate vitamin D.
✅ There’s no evidence that regular sunscreen use leads to vitamin D deficiency. If you’re concerned, consult with a doctor about vitamin D supplements.
Myth #5: No Sun, No Harm
Cloudy day? No problem, right? Wrong.
- Up to 80% of UV rays can penetrate clouds, causing skin damage even when the sun isn’t visible.
- Snow and ice reflect up to 80% of UV rays, increasing exposure even in winter.
✅ Wear sunscreen year-round — rain or shine.
Myth #6: Sunlight Can’t Penetrate Through Windows
Glass blocks UVB rays, but UVA rays — which penetrate deeper into the skin — can still pass through.
- Long drives, sitting near a window, and even airplane travel expose you to UVA rays.
- UV exposure through windows contributes to premature aging and skin cancer.
✅ If you spend time near windows, wear sunscreen indoors too.
Myth #7: Darker Skin Doesn’t Need SPF
It’s true that melanin provides some natural UV protection, but darker skin is still vulnerable to sun damage, including:
- Hyperpigmentation
- Wrinkles
- Skin cancer
✅ Everyone, regardless of skin tone, should wear sunscreen daily.
Myth #8: Sunscreen Lasts All Day
Sunscreen isn’t a one-and-done deal — it wears off after a few hours, especially when swimming, sweating, or towel-drying.
Experts recommend:
- Reapply sunscreen every two hours.
- Use a water-resistant formula (like Neutrogena Beach Defense SPF 50+) when swimming or sweating.
✅ Consistency is key to effective protection.
Myth #9: Sunscreens Don’t Expire
Sunscreens are regulated by the FDA and typically have a shelf life of three years — but exposure to extreme heat or cold can degrade them faster.
Tips:
- Always check the expiration date.
- Store sunscreen at room temperature.
- If the texture or smell changes, toss it out.
The Bottom Line
Debunking these SPF myths highlights the importance of consistent, proper sun protection. Sunscreen isn’t just about preventing sunburn — it’s a key step in reducing the risk of skin cancer and premature aging.
✅ Tips for Optimal Sun Protection:
- Choose a broad-spectrum sunscreen with at least SPF 30.
- Reapply every two hours and after swimming or sweating.
- Cover exposed skin with UPF-rated clothing.
- Consult a dermatologist to find the right SPF for your skin type.
Sun protection is a year-round commitment. Make it part of your daily routine, and your skin will thank you!
