What Is SPF and Do You Really Need It Every Day?
When people talk about skincare, SPF tends to come last. It's the afterthought. The thing you forget to reapply. Or the product you avoid because it feels heavy, leaves a white cast, or interferes with makeup.
FAQs: SPF Facts, Myths & Daily Use
What Does SPF Actually Mean?
SPF stands for Sun Protection Factor. It measures how well a product helps shield your skin from UVB rays, which are responsible for sunburn.
An SPF 30, when applied correctly, means you could stay in the sun 30 times longer without burning than if you wore nothing at all. SPF 50 gives slightly more protection, but not double, only about one percent more UVB filtered.
Is SPF 30 Enough?
It can be, but it depends on how you use it. SPF 30 blocks about 97 percent of UVB rays when applied correctly. SPF 50 blocks around 98 percent. The difference might sound small, but over time, it matters.
How Much SPF Should You Use?
More than most people think. You need about half a teaspoon for your face and neck, and a shot glass amount for your entire body.
That small pump you rub between your hands and pat across your cheeks? Not enough. To get the stated protection, you need to use the correct amount and cover every exposed area.
SPF should be the final step in your skincare routine, before makeup. Give it a minute to set before applying foundation or concealer.
Does Sunscreen Expire?
Yes, and once it does, the protection breaks down. Most sunscreens last around three years, but heat, sunlight, and air exposure can shorten that. If the texture or smell changes, or the expiry date has passed, it’s time to replace it.
Can You Tan While Wearing SPF?
Yes. SPF reduces the amount of UV that reaches your skin but doesn’t block it completely. So even with protection, you can still tan, especially if you’re not reapplying.
Tanning is a sign of skin stress. It's your body’s response to DNA damage caused by UV exposure, not a signal of health. Regular sun exposure without protection leads to collagen breakdown, pigmentation, and loss of elasticity.
If keeping your skin looking youthful is part of your skincare goals, SPF should be non-negotiable.
Does Sunscreen Block Vitamin D?
Not entirely. Even with sunscreen on, some UVB rays still reach your skin, especially if you’re not applying it perfectly or reapplying as often as you should.
Mineral vs Chemical Sunscreen: What’s the Difference?
Both protect your skin from the sun. The difference is in how they work.
Mineral sunscreens, also called physical sunscreens, sit on top of the skin and reflect UV rays. They usually contain zinc oxide or titanium dioxide.
Chemical sunscreens absorb UV rays and convert them into heat. Ingredients include avobenzone, octinoxate, or oxybenzone, among others.
Mineral formulas are often better for sensitive skin and are less likely to cause discomfort . Chemical sunscreens usually feel lighter and disappear more easily under makeup.
How Often Should You Reapply?
Every two hours if you're exposed to sunlight. Also reapply after swimming, sweating, or towel drying. That applies to face and body.
Should You Wear SPF Every Day?
Yes, even in winter, even on cloudy days, and even if you aren’t planning to spend time outside.
UVA rays are present year-round and penetrate glass. They're the ones responsible for long-term changes to the skin: loss of firmness, fine lines, dark spots, uneven tone, and rough texture. Wearing daily SPF can help to prevent all of this.
Think of it as your most reliable product to protect from signs of aging. Serums and moisturisers can only do so much if UV exposure is undoing their work behind the scenes.
Choosing the Right SPF for Your Face
Lightweight, hydrating, and visibly firming.
Brightens and smooths without oil or fragrance.
Hydrates with a sheer tint for a healthy glow.
The Bottom Line
SPF is not a seasonal extra or a beach-day add-on. It’s a daily essential that helps protect your skin from immediate and long-term skin concerns .
If you care about your skin’s health, texture, and longevity, sunscreen is your first line of defence. Choose one you’ll reach for every day, use enough, and reapply when you need to.
Simple habits, lasting results.
