SPF & Sun Safety: 9 Myths Busted!
Let’s clear up some common sunscreen misconceptions so you can enjoy the sun safely and confidently!
Myth #1: All sunscreens work the same.
False. There are two main types:
- Chemical sunscreens absorb UV rays.
- Physical (mineral) sunscreens sit on the skin and reflect UV rays using ingredients like zinc oxide or titanium dioxide.
- Zinc oxide blocks the broadest spectrum of UV rays, followed closely by titanium dioxide and then chemical UV blockers.
Hybrid sunscreens combine both. No matter the type, choose broad-spectrum SPF 30 or higher to protect against UVA and UVB rays.
Myth #2: Any sunscreen will do.
False. Sunscreens come in creams, sprays, sticks, and powders — each with pros and cons. For example, sprays are quick but easy to miss spots with.
Dermatologist tip: Physical blockers are usually the most reliable and safest. Chemical sunscreens have raised health concerns because they act as endocrine disruptors and are harmful to ocean reefs. If you must wear a chemical sunscreen, choose avobenzone-based formulas without oxybenzone or octinoxate, and look for “reef-safe” or EWG-rated options. Always follow the label for how and when to reapply.
Myth #3: Sunscreen causes cancer.
False. Sunscreen does not cause cancer — but UV rays definitely can. While past recalls have involved contamination (not the ingredients), physical blockers may offer peace of mind since they don’t absorb into the skin. Chemical sunscreens are better than no sunscreen, especially in high UV environments.
Zinc oxide-based sunscreens are safest when trying to minimize systemic exposure and endocrine effects.
Patients who are pregnant, immunocompromised, recovering from hormone-sensitive cancers, or very young should lean toward mineral-only sunscreens.
Be sure to practice other sun-safe habits:
👕 Wear UPF clothing
👒 Wear wide-brimmed hats
🕶️ Wear UV-blocking sunglasses
🌳 Stay in the shade from 10 a.m.–4 p.m.
Myth #4: Dark skin doesn’t need sunscreen.
False. Melanin offers some protection, but not enough to prevent sunburn, skin cancer, or premature aging. Everyone — regardless of skin tone — needs sunscreen.
Myth #5: Waterproof sunscreen means no reapplying.
False. There’s no such thing as “waterproof” sunscreen. Water-resistant formulas still need reapplying after swimming or sweating — check your label to see how often you should be reapplying.
Myth #6: SPF 50 lasts longer.
False. No matter the SPF, reapply every two hours, or sooner if you’re swimming or sweating. Physical sunscreens can help remind you — if you see the white cast, it’s still working!
Myth #7: SPF in makeup is enough.
False. Makeup SPF usually isn’t strong enough. Aim for SPF 30+ and apply extra sunscreen underneath or over your makeup.
Myth #8: No need for sunscreen on cloudy days.
False. UV rays can still penetrate clouds — even on cool or overcast days. Daily sunscreen is always a must.
Myth #9: Sunscreen doesn’t expire.
False. Expired sunscreen won’t protect your skin. Store it as directed (avoid heat!) and check the expiration date before using.
Bottom Line: Sunscreen is a key part of sun safety — but it’s not the only one. Be smart, stay protected, and enjoy the sun responsibly!
