Do you have to use sunscreen even if you're not going to the beach? And what does SPF mean anyway? Dr. Frauke Neuser is revealing the three most important truths about SPF that can help save your skin this summer.

1. Look for SPF 15 — At Least

SPF stands for "sun protection factor." That number you see on sunscreen and skincare bottles tells you, essentially, how much sun energy the product will protect you from when used properly. So find a sunscreen with SPF 15 or higher.

2. Sunscreen Helps With Premature Aging, Too

You may think you only need to use sunscreen when you'll be lying out in the sun — like at the beach or on a hike. But sunscreen can help prevent more than just sunburn. Include it in your daily routine to help prevent premature aging and keep your skin looking young and healthy.

3. All Skin Tones Need SPF

It's not just people with fair skin that need protection from the sun. People with all skin tones should use sunscreen to help prevent skin damage when they're outside. For example, studies have shown that people with darker skin tones experience more hyperpigmentation when exposed to the sun. And having a good SPF can help with that.

So what does Dr. Neuser recommend adding to your daily skincare routine for sun protection? Watch the video above for her advice.

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