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by: Linda Robison / Facial Fitness Specialist @ ABZ
You probably already know sunscreen helps prevent sunburn. But did you know it’s also the #1 product for preventing wrinkles, sagging, and dark spots?
Fact: Sunscreen is more powerful than any serum, cream, or anti-aging treatment when it comes to long-term results. It’s your first line of defense.
Here’s what we’ll cover:
UVA rays are the biggest cause of visible skin aging. They penetrate deeper than UVB rays and gradually break down collagen and elastin—leading to fine lines, sagging, and sun spots.
While broad-spectrum sunscreens protect against both UVA and UVB, not all formulas are equally effective at blocking UVA rays (the ones responsible for aging).
According to studies from the MD Anderson Cancer Center and the Center for Research on Ingredient Safety mineral sunscreens—especially those with high zinc oxide concentrations—offer more consistent, stable UVA protection than chemical formulas.
While ingredients in chemical sunscreens, such as avobenzone, do provide UVA protection, they can break down more quickly when exposed to sunlight—reducing their long-term effectiveness.
Need help picking one? Check out my favorite chemical-free sunscreens for your face. They’re reef-safe, non-irritating, and layer beautifully under makeup.
Here is the best protection combo:
Quick tip: Mineral sunscreens work immediately and layer well over moisturizers or serums
You already know SPF tells you how well a product protects against UVB rays—the ones that cause sunburn. But SPF doesn’t tell the whole story.
That’s where the PA rating comes in. It measures UVA protection—the deeper-penetrating rays responsible for:
Even on cloudy days or behind glass, UVA rays still reach your skin. So the PA rating can make a big difference if your goal is long-term anti-aging protection.
The PA Rating Scale:
Note: PA ratings are more common in Korean and Japanese sunscreens. In the U.S., many mineral sunscreens offer strong UVA protection even if they don’t list a PA rating.
*See a list of products that offer the PA rating at the bottom of this page.
Both types protect your skin—but they do it in different ways.
Mineral sunscreen (also called physical):
Ingredients to look for: Zinc oxide, titanium dioxide
Chemical sunscreen:
Ingredients to look for: Avobenzone, octinoxate, oxybenzone
Not sure which to use?
Eco note: Chemical sunscreens with oxybenzone and octinoxate can damage coral reefs and marine life. Mineral sunscreens (zinc or titanium-based) are reef-safe and safer for aquatic ecosystems.
Most people apply too little sunscreen—so they’re not getting the protection listed on the label. To be sure, use the two-finger rule:
Yes—because UVA rays are sneaky. They’re not blocked by clouds or glass, and they penetrate deep into the skin—even when you’re inside.
UVA exposure happens when:
Study-backed fact: Research shows people who sit near windows for long periods are more likely to develop sun damage—especially on the side of the face and hands closest to the window.
Protection tips if you’re indoors a lot:
Reminder: UVB causes sunburn, but UVA causes wrinkles, sagging, and age spots. That’s why daily sunscreen is key—even when you're not outside.
Wondering which goes first—sunscreen or moisturizer—and how makeup fits in?
The answer depends on what type of sunscreen you’re using (mineral or chemical), and it can make or break your SPF protection.
Quick tip: Mineral sunscreens go on after moisturizer. Chemical sunscreens go on before.
Get the full breakdown here: When to apply sunscreen before or after moisturizer
Personally, I reach for mineral sunscreen. It layers easily over skincare, works immediately, and can be re-applied throughout the day—even over makeup.
It also tends to play nicer with sensitive skin and doesn’t break down as fast in the sun.
If you want the strongest protection from UVA aging rays, look for PA+++ or PA++++ rating on the label (in addition to SPF 30 or higher).
No matter which type of sunscreen you choose, the most important thing is using it consistently—and correctly.
Bonus: Today’s sunscreens are better than ever—with improved UVA protection, longer-lasting formulas, and even mineral-chemical hybrids that feel great on skin.
Want to go the extra mile? Pair your SPF with UPF clothing, wide-brim hats, and a little shade when you can.
Because nothing fights wrinkles, dark spots, and sagging quite like good sun protection. Already seeing sunspots? Here’s how to fade them at home—even if they’ve been around a while.
Colorescience - Mineral block has a 4-star PA rating: Brush on mineral powder or Face Shield Glow Cream
Supergoop - Chemical block has a 4-star PA rating: Everyday Play SPF 50 Lotion
Derma B - Mineral block has a 4-star PA rating: Derma B Everyday Sunblock Lightweight Moisturizer
Question: Does sunscreen actually reverse wrinkles?
Answer: No—it doesn’t reverse wrinkles, but it can prevent them from getting worse. Some studies show it may even improve skin texture slightly over time.
Question: What’s the best SPF for aging skin?
Answer: Go for SPF 30 or higher. SPF 50 is a great choice if you’re outside a lot or prone to hyperpigmentation.
Question: Is mineral sunscreen better for mature skin?
Answer: Yes—especially if your skin is sensitive, or you use layered skincare. It works instantly and is less likely to cause irritation.
1. The Sunscreen You Use Matters More Than You Think - Natures Helper Medical Clinic
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About the Author:
Linda Robison is a Facial Fitness Specialist and the founder of Anti-Aging Beauty Zone. She shares expert insights on skincare, facial rejuvenation, and beauty treatments—blending traditional wisdom, personal experience, and science-backed research for both at-home and in-office solutions.
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