What is SPF and
how often should you apply it?
Sun protection is essential for helping you maintain healthy-looking skin and preventing long-term damage. Prolonged exposure to the sun can cause sunburn, premature skin ageing, and increase the risk of skin damage. Sunscreen plays a crucial role in shielding your skin from harmful UV radiation, and SPF is a key factor when you’re choosing the right protection.
What does
SPF stand for?
The SPF on sunscreen stands for sun protection factor, a relative measure of the level of protection a sunscreen provides (avoids time-based guarantee) from ultraviolet (UV) rays. The higher the SPF number, the higher the percentage of UVB rays it can block.
The difference between
SPF levels
- SPF 15 blocks approximately 93% of UVB rays
- SPF 30 blocks about 97% of UVB rays
- SPF 50 blocks approximately 98% of UVB rays
SPF is determined by measuring the time it takes for redness (erythema) to appear on unprotected skin exposed to a specific dose of UV rays, compared with unprotected skin. SPF is determined by measuring the time it takes for redness (erythema) to appear on unprotected skin exposed to a specific dose of UV rays, compared with unprotected skin. In practice, though, it’s a different story, as how long a sunscreen is effective can depend on a number of factors, such as how much you apply, the UV index, and whether your skin is sweating or you’re swimming. You should see the SPF value more as a guide, and make sure you reapply it regularly.
How to apply
SPF correctly
Sunscreen should be applied generously to all uncovered areas. The amount of SPF you need varies by age:
- Under 3 years: Avoid exposing babies and young children to the sun as much as you can by keeping them in the shade and using protective clothing, a hat, sunglasses and a parasol, as their skin is extremely delicate and more vulnerable to UV damage. For uncovered areas that might get indirect exposure, use a minimum of 5 to 10 ml for babies aged 6 months and over.
- Children (3–5 years): At least 10–15 ml.
- Children (5–10 years): Need at least 15–20 ml for full coverage.
- Adults and children over 10: Need at least 30–40 ml for the whole body.
When you’re applying SPF to your face, make sure you use a sunscreen that’s formulated for the face and sensitive skin.
How long does SPF 50 last and
how often should you reapply sunscreen?
Whatever SPF level you use, to maintain optimal protection you should reapply sunscreen every two hours. If you’re swimming, sweating, or towel-drying, it will wear off more quickly, so you’ll need to reapply more often. Always check the sunscreen’s water-resistant label for specific guidance on reapplication during water activities. Regular reapplication helps make sure you’re protected throughout the day.
What is SPF and
how often should you apply it
Application:
You should reapply sunscreen every two hours, or more often if you’re swimming or sweating.
What is SPF:
SPF stands for Sun Protection Factor, and shows the level of protection the sunscreen provides against UVB rays.
SPF levels:
SPF 15 blocks approximately 93% of UVB rays
SPF 30 blocks approximately 97% of UVB rays.
SPF 50 blocks approximately 98% of UVB rays.
Protection with SPF
for the face
Your face is highly exposed to UV rays, so daily SPF application is essential to protect against sun damage and help prevent premature skin ageing. SPF 30 and above provides high protection and can be effective when applied and reapplied correctly. This aligns with TGA statement that SPF 30 provides high protection.
Apply sunscreen as the last step of your skincare routine and before you apply any makeup, covering your face, neck, and upper torso. Using moisturisers with SPF is a convenient way to build SPF into your daily routine.
Although lots of makeup products now contain SPF, they’re generally not applied in sufficient quantities to give you adequate protection. It’s therefore important to still use a sufficient amount of sunscreen for optimal protection.
Protection with SPF
for the body
Choosing the
right SPF for your skin
- Fairer skin tones:For fair skin tones, an SPF 50+ is recommended, as fair skin has lower melanin levels and is more prone to burning and skin damage.
- Darker skin tones:For darker skin tones, an SPF 30+ is usually sufficient, as melanin offers some natural UV defence. However, this doesn’t remove the risk of sunburn, hyperpigmentation, or skin damage, so daily SPF application is still essential. In some cases, an SPF 50 may be recommended, particularly to protect your face if you’re getting a lot of sun exposure or if you have hyperpigmentation.
- Oily skin:For oily skin, it’s best to use a lightweight, mattifying sunscreen that won’t clog your pores or feel greasy. Sun protection products in fluid or gel form generally feel less oily than creams. Look for products with an ultra-light texture and ingredients such as Niacinamide to absorb excess sebum and help prevent imperfections.
- Sensitive skin:For sensitive skin, choose sun creams that are specially formulated for this skin type and have been dermatologically tested. Fragrance-free, ethyl alcohol-free and “for sensitive skin” options help minimise the risk of redness and discomfort.
- Dry skin:Dry skin benefits from hydrating sunscreens enriched with ingredients like Hyaluronic Acid, Glycerine, or Ceramides to lock in moisture while providing UV protection. Many SPF-infused moisturisers offer both sun protection and hydration, helping prevent dryness and flaking caused by prolonged sun exposure.
What’s the difference?
Protection levels above SPF 50 only offer marginal extra coverage, and no level of SPF can provide 100% protection. SPF 30 provides high protection and can be effective when applied and reapplied correctly. However, in Australia, SPF 50 or SPF 50+ are generally recommended particularly during periods of high UV or extended outdoor exposure. If you're after reliable sun protection, try our NIVEA Sun Protect & Moisture SPF 50 Lotion.
Summary
Disclaimer
ALWAYS READ THE LABEL AND FOLLOW THE DIRECTIONS FOR USE. SUNSCREENS ARE ONLY ONE PART OF SUN PROTECTION. AVOID PROLONGED HIGH-RISK SUN EXPOSURE. REAPPLY FREQUENTLY.
