Sunscreen 101: What Everyone Should Know

Sunscreen is one of the simplest and most effective tools for protecting your skin from the sun’s damaging rays. But according to the Skin Cancer Foundation, many people aren’t using it correctly or aren’t using it at all. Whether you’re heading to the beach or just running errands on a sunny day, understanding the basics of sunscreen can make a big difference in your long-term skin health.

Understanding the Sun’s Rays

At its core, sunscreen is designed to protect your skin from ultraviolet (UV) radiation. There are two main types of UV rays that affect the skin:

• UVA rays penetrate deep into the skin and contribute to premature aging, such as wrinkles and fine lines.
• UVB rays are responsible for sunburn and play a key role in the development of skin cancer.

A good sunscreen should protect against both, which is why you’ll often see the term “broad-spectrum” on labels. This simply means the product shields you from both UVA and UVB rays.

What Is SPF and Why Does It Matter?

Another important factor to understand is SPF, or sun protection factor. SPF measures how well a sunscreen protects against UVB rays. For example, SPF 30 means it would take 30 times longer for your skin to burn compared to not wearing sunscreen at all. Dermatologists generally recommend using at least SPF 30 for daily activities, while SPF 50 may be better for extended outdoor exposure. However, higher SPF doesn’t mean you can apply it once and forget about it—reapplication is essential.

One of the most common mistakes people make is not using enough sunscreen. Most adults need about one ounce (roughly a shot glass full) to cover their entire body. For the face alone, a nickel-sized amount is a good rule of thumb.

Sunscreen should be applied about 15 minutes before going outside to allow it to properly absorb into the skin. Don’t forget commonly missed areas like the ears, back of the neck, tops of the feet, and even scalp if you have thinning hair.

And reapplying sunscreen is just as important as putting it on in the first place. Sunscreen should be reapplied every two hours, or more often if you’re swimming or sweating. Even “water-resistant” formulas are not completely waterproof—they simply offer protection for a limited time while in water. Always check the label to see whether the product is water resistant for 40 or 80 minutes.

Different Types of Sunscreens

There are also different types of sunscreens to consider. Mineral (or physical) sunscreens contain ingredients like zinc oxide or titanium dioxide, which sit on top of the skin and reflect UV rays. These are often recommended for sensitive skin because they are less likely to cause irritation.

 Chemical sunscreens, on the other hand, absorb UV rays and convert them into heat, which is then released from the skin. They tend to be lighter and easier to blend, making them a popular choice for everyday wear. Neither type is inherently “better”—it often comes down to personal preference and skin type.

Sunscreen: Not Just for Sunny Outdoor Days

It’s also worth noting that sunscreen isn’t just for sunny days. UV rays can penetrate through clouds and even glass. This means your skin is still exposed on overcast days or while you are driving your car or indoors near windows. Making sunscreen part of your daily routine—much like brushing your teeth—can help ensure consistent protection.

Remember that sunscreen is just one part of a broader sun protection strategy. Wearing protective clothing, seeking shade during peak sun hours, and using sunglasses and hats can all help reduce your overall exposure.

If you are looking for ideas to help you get the most out of the sunny season, we have some ideas. Safe Outdoor Activities for Seniors to Enjoy This Summer offers suggestions ranging from bird-watching to container gardening!