Sun or Sunscreen: Which One Should You Worry About More?

If I had a dime for every basal or squamous cell skin cancer I've had removed, I'd have a lot of dimes. I earned every one of them, too. That picture above is me as a teenager doing my homework in the pool, with no hat, no shade, and sometimes I'd put on olive oil instead of sunscreen. Throw in years on a swim team and spring ski trips where SPF was an afterthought, and yeah, I've made my own skin cancer.

I should be the poster child for sunscreen by now.

But here's what I didn't expect, once I actually started paying attention: sunscreen shopping isn't as simple as grabbing whatever has the biggest SPF number on the front. A lot of the sunscreens sitting on shelves right now have ingredients that raise real questions, not just for your health, but for what happens to that stuff once it washes off you and into the water.

The chemicals under the most scrutiny are a small group of UV filters: oxybenzone, octinoxate, homosalate, octocrylene, and avobenzone. The FDA's own research found that all five are absorbed into the bloodstream after a single application, at levels above what the agency considers worth investigating further, and traces can still turn up in blood a week or more later. Of the sunscreen active ingredients sold in the U.S., only two - zinc oxide and titanium dioxide - have been classified by the FDA as officially safe and effective. The rest, including the five above, are still waiting on enough safety data to earn that same label. Some of the early research has linked oxybenzone specifically to hormone disruption, including lower testosterone in adolescent boys and changes tied to pregnancy length. None of this is settled science, but it was enough for the European Union to cap how much of these chemicals sunscreens are allowed to contain.

Then there's what happens once it rinses off you. Hawaii and Key West have banned oxybenzone and octinoxate outright, because even small concentrations can damage coral DNA, cause deformities in developing coral, and make reefs more prone to bleaching. Multiply that by every swimmer, every summer, and it adds up to tens of thousands of pounds of these chemicals draining into reef waters every year.

So somewhere along the way I started wondering: which am I actually more scared of here, the sun or the sunscreen?

Good news! I no longer have to pick a side. This post walks through the myths that kept me making mistakes for years, then lays out a clearer way to think about protecting your skin for good.

Five Sunscreen Myths I Believed for Years

Myth: You don't need sunscreen on cloudy days

A couple of horrible sunburns on overcast days at the beach taught me the hard way: up to 80% of UV can slide right through a layer of light cloud cover. Wear the sunscreen anyway. Overcast is not a free pass, I can assure you.

Myth: A higher SPF buys you more time in the sun

I used to think SPF was basically a stopwatch. Higher number, more hours, simple math. Turns out SPF only measures how well something filters UVB rays (the burn-causing ones), not how long you get to ignore the clock. SPF 30 blocks about 97% of UVB, SPF 50 blocks around 98%, and neither one means you can skip reapplying. Every two hours, sooner if you're sweating or in the water, no matter the number on the bottle.

Myth: No sunburn means no damage

This is the sneaky one. UVA rays don't announce themselves the way UVB does, no redness, no peeling, nothing that makes you go "ouch, that was too much." They just quietly work on the deeper layers of your skin, leading to wrinkles, DNA damage, and yes, skin cancer, all building up in the background while you feel completely fine. Not burning was never proof I was in the clear. I just didn't know that yet. Now I have way more wrinkles and dark spots than many people my age, and it's not for lack of expensive miracle potions and even multiple Fraxel sessions.

Myth: My SPF moisturizer or foundation has me covered

I wish this one were true. My dermatologist tells me it's just not, mostly because none of us apply nearly enough of it to hit the SPF number printed on the label. Think of your SPF makeup as a nice bonus layer, not your actual sunscreen. Your actual sunscreen still has to happen separately.

Here's a myth that doesn't apply to this red-haired, hazel-eyed girl of mostly English descent, but needs to be written: Dark skin doesn't need sunscreen

Melanin does give some natural protection, something like a built-in SPF of 13, which sounds like a lot until you remember a good sunscreen gives you 30, 50, more. Everyone's skin can be damaged by UV, no matter the color, even if what that damage looks like, and how it shows up as cancer risk, isn't identical for everyone. "I don't burn" was never the same question as "am I protected."

How Do I Know Which Sunscreens Are Good to Buy?

Here's the question I care about now: which products can I buy without having to take a magnifying glass to the store to scrutinize the ingredient list?

This is where I lean hard on the Environmental Working Group, EWG for short. They're an independent nonprofit that offer loads of amazing resources, including putting together a big list of safe sunscreens.

Their most recent free guide looked at almost 2,800 sunscreens and found that only about 1 in 5 actually meet their bar for ingredient safety and real broad-spectrum protection.

Sit with that for a second. Four out of five sunscreens on shelves right now don't clear a fairly basic bar.

Is EWG's system perfect? No, nothing is. But they're transparent about how they rate things, and that counts for a lot with me. Here's a link to see this year's top picks for daily use, recreational, and baby and kids' sunscreens. I make my life easier by just shopping from their list or looking for the "EWG verified" mark on bottles at the store.

Sun Protection Isn't One Product, It's a Stack

Here's how I actually think about this now: sun protection works in layers. Each one chips away at your lifetime UV exposure, not just today's.

Sunscreen. Just make sure it's one that's actually earned its claims.

Clothes. A real hat, tightly woven fabric - this stuff blocks UV before it ever touches you. No reapplying required.

Shade. The easiest layer to use and somehow the easiest one to forget. One trick that'll stick with you long after you forget the actual numbers: if your shadow is shorter than you are, the sun is near its peak, usually 10am to 4pm, and that's your sign to find shade, add a layer, or just plan to be inside during those hours.

Food. This is the layer nobody talks about, and it's my favorite one, honestly. Tomatoes, carrots, leafy greens, blueberries, green tea, watermelon, fatty fish, none of it replaces sunscreen, but a diet full of carotenoids, polyphenols, antioxidants, and omega-3s genuinely gives your skin backup from the inside. The catch is, it's slow. This isn't a smoothie you drink the morning of the beach trip, it's a pattern you build over weeks. Think of it as protection you're banking for later, not spending today.

None of these on their own is enough. Together, that's what actually adds up over a life.

Check the UV Index, Not Just the Temperature

Most of us check the temperature before heading outside. Far fewer check the UV Index, even though it's the number that actually tells you how much damage you're risking that day.

Here's what's strange: awareness isn't really the gap. Most people already know the UV Index exists. What doesn't follow is the behavior change. In one study, only 28% of men and 46% of women actually adjusted what they did outdoors based on the day's UV reading. We check the number, then go about our day exactly as planned anyway. I include myself in that more often than I'd like to admit.

Here's a quick guide to what the numbers mean:

• UV 0 to 2: Low risk, minimal protection needed.
• UV 3 to 5: Wear sunscreen, sunglasses, and a hat.
• UV 6 to 7: Seek shade, cover up, and reapply sunscreen.
• UV 8 to 10: Extra protection is essential.
• UV 11 and up: Avoid prolonged exposure whenever possible. 

Learn From My Mistakes

I've spent a lot of years treating sun protection as an afterthought, and my skin has kept the receipts. If this post saves you even one of those basal or squamous cell removals, it did its job. Pick a sunscreen that's actually earned your trust, stack the rest of your layers on top of it, and start checking the UV Index the way you already check whether to bring a jacket.

Happy UV Awareness Month! Enjoy the sunshine. Just protect what's carrying you through it.