Sunscreen isn’t just a summer fling — it’s a long-term relationship your skin needs daily. But when you're staring at a shelf full of bottles, trying to pick between SPF 30 and SPF 50, it’s easy to feel overwhelmed.
Is higher always better? Is SPF 30 even enough? Let’s break it all down in a way that actually makes sense.
SPF, or Sun Protection Factor, gauges how well a sunscreen protects against UVB rays — the rays that cause sunburn and contribute to skin cancer. The science is pretty straightforward: SPF 30 blocks approximately 97% of UVB rays, while SPF 50 blocks about 98%.
So mathematically it is only a 1% difference in protection, but for some individuals over long periods of time, that added percent of protection may make a difference (especially for individuals with very fair skin, or anyone that may be particularly sensitive to the sun, or who spends a long time in the sun).
Nonetheless, it’s important to remember that none of these formulas will block 100% of the UV rays, and just trusting the number may lead to a false sense of safety (if you’re not putting it on correctly, or consistently reapplying throughout the day).
SPF 50 is typically recommended for those with lighter skin tones, previous history of sensitivity to the sun, or for occasions that will involve severe sun exposure — like, a trip to the beach, a hike, or outdoor sporting activities.
The slightly increased protection helps to minimize the risk of more significant damage from prolonged UV rays in sunlight.
Meanwhile, SPF 30 is a solid option for the general, daily wear, especially if you are indoors mainly or only going in and out of sunlight to get in and out of your car.
SPF 30 can be a more appropriate choice for those with deeper skin tones, as additional SPF can also leave a white cast on the skin, although newer formulations are coming out quickly to eliminate that concern.
It’s not entirely the SPF number that’s overlooked, rather it’s how you use the sunscreen. People typically don’t put enough on in the first place.
For optimal coverage, Try applying something the size of a nickel to your face and a shot glass amount to your body. You need to reapply every two hours or sooner if you’re sweating or swimming
.One important detail: always check the label for the words “broad-spectrum.” This means it protects against both UVB and UVA rays.
So whether you're team SPF 30 or SPF 50, just remember: the best sunscreen is the one you actually use. Lather it, layer it, reapply like a pro — and let your skin stay glowing, protected, and unbothered.