Reading product labels isn't exactly exciting, but it is important. This is especially true when it comes to what we put in and on our bodies. Understanding sunscreen labels can be confusing and downright annoying, but knowing what the terms mean can put your mind at ease. Follow our guide to make the best decision for your skin, your lifestyle, and your loved ones.
Why Sunscreen Labels Matter
Sunscreen labels are designed to tell you how a product protects your skin and the proper way to apply it. While marketing phrases may catch your attention, the regulated information on the label provides the details that matter most.
Looking beyond the front of the bottle can help you answer important questions, such as:
- Does it protect against both UVA and UVB rays?
- How long will it stay effective while swimming or sweating?
- Is it suitable for sensitive skin?
- How often should it be reapplied?
Once you know what the labels mean, comparing products becomes much easier.
Broad Spectrum
One of the most important phrases to look for is broad spectrum.
Broad-spectrum sunscreen protects against both UV wavelengths:
- UVA rays, which penetrate deeper into the skin and contribute to premature aging, wrinkles, and can increase the risk of skin cancer.
- UVB rays, which primarily cause sunburn and also increase the risk of skin cancer.
A sunscreen that only protects against UVB rays may prevent sunburn while still allowing damage from UVA exposure. Choosing a broad-spectrum sunscreen helps provide more complete protection from the sun.
SPF: What Does the Number Mean?
SPF stands for Sun Protection Factor.
It measures how well a sunscreen protects against UVB rays, not UVA rays.
Many people assume a much higher SPF level provides dramatically more protection, but the difference becomes smaller as the numbers increase.
Here's a general comparison:
- SPF 15 filters about 93% of UVB rays
- SPF 30 filters about 97%
- SPF 50 filters about 98%
No sunscreen blocks 100% of UVB rays, regardless of the SPF.
Higher SPF products can provide slightly more protection, but they are not a replacement for proper application or regular reapplication.
Water Resistant vs. Waterproof
One common misconception is that sunscreen can be waterproof.
In reality, no sunscreen is allowed to be labeled as waterproof or sweatproof.
Instead, you'll see water resistant, followed by a time:
- Water resistant (40 minutes)
- Water resistant (80 minutes)
This means the sunscreen has been tested to maintain its stated SPF protection while you are in the water or sweating for that amount of time.
Even water-resistant sunscreen should be reapplied after swimming, towel drying, or heavy sweating.
What Does "Sport" Mean?
Many sunscreens marketed for sports or outdoor activities are designed to stay on better during movement and perspiration.
Sport sunscreens often feature:
- Water resistance
- Sweat resistance during testing
- More durable formulas for active lifestyles
However, "sport" is primarily a marketing description rather than a separate level of sun protection.
A sport sunscreen still needs to be reapplied regularly, especially during extended outdoor activity.
Baby Sunscreen
Baby sunscreen is typically formulated with ingredients that are less likely to irritate delicate skin.
Many baby sunscreens:
- Use mineral UV filters like zinc oxide or titanium dioxide
- Avoid added fragrances
- Are designed to be gentle on young skin
For infants younger than 6 months, experts generally recommend avoiding direct sun exposure when possible rather than depending on sunscreen alone. Protective clothing and shade are still the best options.
Sensitive Skin
If you have easily irritated skin, look for products labeled for sensitive skin.
These sunscreens may:
- Be fragrance-free
- Avoid certain preservatives or dyes
- Use mineral active ingredients like zinc oxide
- Be dermatologist tested
Although these formulas may reduce the chance of irritation, everyone's skin is different. Patch testing a new product before regular use can be helpful.
Mineral vs. Chemical (Organic) Sunscreens
Another important distinction is the type of UV filters used.
Mineral Sunscreens
Mineral sunscreens use active ingredients such as:
- Zinc oxide
- Titanium dioxide
These ingredients sit on the skin's surface and help reflect, scatter, and absorb UV radiation before it can damage the skin.
Many people with sensitive skin prefer mineral sunscreens because they are generally well-tolerated.
Chemical (Organic) Sunscreens
Chemical sunscreens use ingredients that absorb UV energy and convert it into heat that is released from the skin.
Common active ingredients include:
- Avobenzone
- Octisalate
- Octocrylene
- Homosalate (where permitted)
- Bemotrizinol (available in some countries)
Chemical sunscreen can irritate sensitive skin, cause eye irritation, and lead to other potential health concerns.
Both mineral and chemical sunscreens can provide effective protection when used correctly.
Active Ingredients
The "Active Ingredients" section tells you exactly which UV filters provide the sun protection.
This section can help you:
- Compare products
- Identify ingredients that work well for your skin
- Avoid ingredients you've reacted to in the past
If you're looking specifically for a mineral sunscreen, this is where you'll confirm that zinc oxide or titanium dioxide is the active ingredient.
Fragrance-Free vs. Unscented
These two terms are often confused.
Fragrance-free means no fragrance ingredients have been intentionally added.
Unscented means the product may contain ingredients that mask odors, even though it does not have a noticeable scent.
People with sensitive skin often prefer fragrance-free products.
Face vs. Body Sunscreen
Face sunscreens are usually formulated to feel lighter on the skin and may be less likely to clog pores or interfere with makeup.
Body sunscreens often prioritize coverage over cosmetic elegance.
In some cases, a gentle body sunscreen can be used on the face if it doesn't irritate, but products specifically designed for facial use are best for daily wear.
What Does "Dermatologist Tested" Mean?
Many products state they are dermatologist-tested.
This generally means dermatologists participated in evaluating the product, but the phrase does not guarantee that every dermatologist recommends it or that it is suitable for everyone.
It's still important to consider the ingredients and choose products appropriate for your skin type.
Why Reapplication Matters
Even the best sunscreen gradually becomes less effective throughout the day.
Sun protection can wear away because of:
- Sweating
- Swimming
- Towel drying
- Touching your face
- Natural breakdown from UV exposure
Most experts recommend reapplying sunscreen at least every two hours during sun exposure and immediately after swimming, heavy sweating, or towel drying.
Reapplication is just as important as choosing the right SPF. A high-SPF sunscreen won't provide its intended level of protection if it isn't reapplied.
For people who wear makeup, sunscreen mists or powders designed for reapplication can make it easier to maintain protection throughout the day without disturbing cosmetics.
Can You Use Sunscreen With Insect Repellent?
Yes, but it's generally recommended to use separate products rather than a combination sunscreen and insect repellent.
Here's why:
- Sunscreen should be reapplied every two hours or after swimming or sweating.
- Insect repellent typically does not need to be applied as frequently.
Using a combination product may lead you to apply more insect repellent than necessary simply because your sunscreen needs refreshing.
If you need both products:
- Apply sunscreen first.
- Allow it to dry.
- Apply insect repellent over the sunscreen.
Following each product's directions helps ensure both work as intended.
Other Helpful Terms You May See
You may also notice these descriptions on sunscreen packaging:
- Non-comedogenic: Formulated to be less likely to clog pores.
- Oil-free: Contains little or no added oils, making it a popular choice for oily skin.
- Sheer or invisible finish: Designed to leave little or no visible white cast after application.
- Reef-conscious or reef-friendly: These claims are not standardized, so it's worth looking at the ingredient list rather than relying solely on the label.
- Expiration date: Sunscreen should not be used past its expiration date, as the active ingredients may no longer provide reliable protection.
Understanding sunscreen labels doesn't require memorizing every ingredient or technical term. Focusing on a few key details—such as broad-spectrum protection, SPF, water resistance, active ingredients, and proper reapplication—can help you choose a product that fits your daily routine and provides reliable sun protection.
The label is more than just marketing. It's a guide to how the sunscreen works, who it may be best suited for, and how to use it effectively. Taking a few extra moments to read it can help you get the most out of your sunscreen.
Image credits: Yuliia Stanko/Pexels (featured)
