Sun Protection 101: How to Choose the Best Sunscreen

May 21st, 2019

By Anne Arundel Dermatology

Whether you’re heading to the beach or just running errands, daily sun protection is one of the most important steps you can take for your skin. But with so many options available, choosing the best sunscreen for sun protection can feel overwhelming.

At Anne Arundel Dermatology, we’re here to simplify it so you can confidently protect your skin every day.

Why Sunscreen Is Essential for Healthy Skin

Sunscreen does more than prevent sunburn. Daily use helps protect against:

Skin cancer, including melanoma
Premature aging, like wrinkles and sunspots
Hyperpigmentation and uneven skin tone

In fact, about one in five Americans will develop skin cancer in their lifetime. Consistent use of a broad spectrum sunscreen is one of the most effective ways to reduce that risk.

Even on cloudy days, up to 80% of UV rays can reach your skin, so sunscreen should be part of your everyday routine.

Understanding SPF: What the Numbers Really Mean

SPF (Sun Protection Factor) measures how well a sunscreen protects against UVB rays, the main cause of sunburn.

SPF 15 blocks about 93% of UVB rays
SPF 30 blocks about 97%
SPF 50 blocks about 98%

No sunscreen blocks 100% of UV rays, which is why proper application and reapplication matter just as much as the SPF number.

Dermatologist tip: Choose SPF 30 or higher and make sure your sunscreen is labeled broad spectrum, meaning it protects against both UVA (aging) and UVB (burning) rays.

Mineral vs. Chemical Sunscreen: What’s the Difference?

Feature	Mineral Sunscreen	Chemical Sunscreen	Hybrid Sunscreen
How it Works	Sits on top of the skin and reflects UV rays	Absorbs UV rays and converts them into heat	Combines mineral reflection & chemical absorption
Active Ingredients	Zinc oxide, Titanium dioxide	Avobenzone, Oxybenzone, Octinoxate, Octocrylene	Zinc oxide or titanium dioxide + chemical filters
Best for Sensitive Skin	Excellent	Might Cause Skin Irritation	Depends on Formula
Best for Acne-Prone Skin	Often Recommended by Dermatologists	Can Clog Some Pores	Depends on Formula
Best for Dry or Aging Skin	Can be drying without moisturizers	Often more moisturizing	Recommended Option
Texture & Finish	Thicker, so it may leave white cast	Lightweight with sheer finish	Improved Cosmetic Feel
White Cast	Possible	Minimal	Minimal
Water-Resistance	Available	Available	Available
Reef-Safe Options	More Reef-Friendly	Some ingredients harm reefs	Depends on the ingredients
Recommended for Children	Yes	Use with caution	Often mineral-heavy
Immediate Protection	Yes	Needs at least 15 minutes	Partially Immediate

How to Choose the Best Sunscreen for Your Skin Type

The best sunscreen is one you’ll actually use every day. Start with these basics:

Look for broad spectrum protection
Choose SPF 30 or higher
Opt for water-resistant formulas if you’ll be sweating or swimming

Then match your sunscreen to your skin type:

Sensitive skin: Mineral formulas with zinc oxide
Acne-prone skin: Oil-free, non-comedogenic sunscreens
Dry or aging skin: Moisturizing formulas with added hydration
Active lifestyles: Water-resistant lotions or sticks

Application Tips

Apply sunscreen 15 minutes before sun exposure
Use about one ounce (a shot glass full) for full body coverage
Reapply every two hours, or after swimming or sweating
Don’t forget easy-to-miss areas like ears, lips, hands, and scalp

Lotions offer the most even coverage, while sticks and sprays are convenient for reapplication. If using sprays, apply generously and rub in to ensure full protection.

Sunscreen Ingredients to Look For — and Avoid

When choosing a dermatologist recommended sunscreen, ingredients matter.

Look For:

Zinc oxide & titanium dioxide (gentle, effective mineral blockers)
Avobenzone (strong UVA protection)

Be Cautious With:

Oxybenzone (may cause irritation in sensitive skin)
Heavily fragranced formulas (can trigger reactions)

If you have sensitive or allergy-prone skin, mineral sunscreens are typically the safest choice.

When to See a Dermatologist About Sun Damage

Even with good sun habits, it’s important to monitor your skin. Schedule a skin check if you notice new or changing moles, spots that itch, bleed, or don’t heal, or darkening or irregular pigmentation.

Regular skin exams help catch potential concerns early, when they’re most treatable.

Expert Sun Protection Care at Anne Arundel Dermatology

Choosing the best sunscreen for your skin doesn’t have to be complicated. At Anne Arundel Dermatology, our skincare specialists can recommend products tailored to your skin type, lifestyle, and concerns, whether you’re managing acne, sensitivity, or signs of sun damage.

Schedule a consultation today to get personalized sun protection guidance and keep your skin healthy year-round.