Key Takeaways

  • Broad-spectrum sunscreen protects against both UVA (aging) and UVB (burning) rays.
  • SPF 30 blocks ~97% of UVB rays, while SPF 50 blocks ~98%.
  • Sunscreen needs reapplying every 2 hours, especially with water or sweat exposure.
  • Tinted sunscreens offer protection from blue light, which can worsen hyperpigmentation.
  • Makeup with SPF alone is not enough for full sun protection.
Woman applying sunscreen on kid.

Sunscreen is a staple in any skincare routine, especially in Malaysia where the UV index regularly hits high to extreme levels. In fact, according to Public health physician, the UV index in the country often exceeds 10 by midday, especially during dry seasons like March to August.

Even each year, an estimated 12 to 15 million people around the world lose their vision due to cataracts. According to the World Health Organization (WHO), up to 20% of these cases may be linked to sun exposure, particularly in countries located near the equator (Yes, Malaysia is located near the equator).

Despite growing awareness, many people still use sunscreen incorrectly or avoid it entirely due to confusion. Here, we address the five most frequently asked questions about sunscreen and what you need to know to stay protected under the Malaysian sun.

1. What is Tinted Sunscreen?

Tinted sunscreen is a mineral-based sunscreen that includes pigment to provide a light tint, designed to blend with a range of skin tones. It offers dual benefits: protection from harmful UV rays and a natural-looking coverage similar to BB cream.

It typically contains:

  • Zinc oxide and titanium dioxide is mineral filters that reflect UV radiation
  • Iron oxides act as pigments that also block visible light, especially high-energy blue light

These tinted sunscreens are especially useful for people with melasma or post-inflammatory hyperpigmentation, as visible blue light from the sun and digital screens can worsen these conditions.

Unlike makeup with SPF, tinted sunscreens are formulated with enough active ingredients to provide meaningful sun protection.

  • Tinted sunscreen helps even out skin tone without the white cast often seen in regular mineral sunscreens.
  • It offers better protection than foundations or powders with SPF, which require impractically heavy application for full UV defense.

If you prefer non-tinted sunscreen, look for broad-spectrum options that use zinc oxide or titanium dioxide. Cosmetic products like lip balms and moisturizers with SPF can help, but they should not replace sunscreen entirely.

2. Does Sunscreen Prevent Tanning?

No sunscreen can block 100% of UV rays, so some tanning may still occur, even with high-SPF products.

Tanning happens primarily due to UVA rays, which penetrate deeper into the skin. UVA not only darkens the skin but also contributes to:

  • Premature skin aging (wrinkles, loss of elasticity)
  • Hyperpigmentation and melasma
  • Skin cancer, including basal and squamous cell carcinomas

UVB rays, on the other hand, are responsible for sunburn and surface-level damage. SPF primarily measures protection against UVB.

  • SPF 30 blocks approximately 97% of UVB rays
  • SPF 50 blocks around 98%

That 1% difference may seem small, but it can be significant in intense sunlight like Malaysia’s, especially with prolonged exposure.

Tanning occurs when:

  • Sunscreen is applied in insufficient amounts
  • It's not reapplied after sweating or swimming
  • Broad-spectrum coverage (which includes UVA protection) is missing

So, while sunscreen reduces tanning, it won’t completely prevent it unless used precisely, frequently, and in combination with physical protection like hats and clothing.

Summary:

Sunscreen helps protect your skin from the sun, but it can’t stop all the sunlight. That means you might still get a little tan, even if you wear it. Sunscreen is like an umbrella. It blocks most of the sun, but not all of it. To help it work better, you need to put enough on and put it on again every 2 hours, especially if you’re playing outside or sweating.

3. How Much Sunscreen Should I Use on My Face?

Most people apply far too little sunscreen, which reduces its effectiveness. To get the labeled SPF protection, you need to use approximately 2 milligrams per square centimeter of skin.

In everyday terms:

  • Face and neck: Use about 1/4 teaspoon (roughly a nickel-sized amount)
  • Entire body: About 2 tablespoons (a shot glass worth)

For sprays: Apply until an even sheen is visible on the skin.

Other methods to estimate sunscreen amount:

  • A line of sunscreen from the base to the tip of your index and middle fingers for your face and neck
  • A dollop about the size of a 10-sen coin for each arm, leg, and section of the body

It’s essential to reapply sunscreen:

  • Every 2 hours, especially during outdoor activities
  • Immediately after sweating, swimming, or toweling off

Sunscreen labeled “water-resistant” only holds up for 40–80 minutes in water, depending on the formula, so timing your reapplication matters.

4. How Long Does Sunscreen Last?

The protection sunscreen offers begins to degrade after about 2 hours of application, regardless of its SPF rating.

While SPF 30 theoretically means you can stay in the sun 30 times longer than without protection, real-life variables such as sweating, humidity, swimming, and rubbing the skin drastically reduce that duration.

  • SPF 30 blocks ~97% of UVB rays
  • SPF 50 blocks ~98%, but not for significantly longer

In Malaysia, with its hot and humid climate, sweat and oil can break down sunscreen more quickly. Even with water-resistant formulas, sunscreen must be reapplied regularly to remain effective.

Key takeaways:

  • Reapply sunscreen every 2 hours, or more often if you're sweating or swimming
  • Use broad-spectrum sunscreen to protect against both UVA and UVB
  • Don’t rely on SPF alone, use shade, clothing, and hats.

Eventhough hijab contributes to sun protection, it doesn't replace sunscreen. Dermatologists still recommend applying broad-spectrum sunscreen (SPF 30‑50+) to all exposed areas, especially the face, neck, and hands to ensure full protection from UV-related skin damage and pigmentation.

5. Can I Use Sunscreen at Night?

Sunscreen is unnecessary and not recommended for nighttime use. But why?

Sunscreens, particularly those with high SPF, contain large molecules that can clog pores and potentially irritate skin if left on overnight. At night, your skin goes into repair mode, and sunscreen can interfere with that process.

For optimal nighttime skincare:

  • Wash off sunscreen thoroughly in the evening
  • Follow up with products suited for nighttime repair, such as moisturizers containing ceramides, niacinamide, or retinoids
  • Avoid active SPF formulas during your nighttime routine

There is no benefit to wearing sunscreen when there is no UV exposure, including while indoors at night.

Final Thoughts

Sunscreen is one of the most effective and accessible ways to protect your skin from sun damage, especially in a country like Malaysia where the UV index remains high throughout the year. Using sunscreen consistently can significantly reduce the risk of sunburn, premature aging, hyperpigmentation, and even skin cancer. For the best protection, choose a broad-spectrum sunscreen with an SPF of 30 or higher, apply it generously, and reapply every two hours or after swimming or sweating. 

Tinted sunscreens can offer additional benefits by blocking visible light, which is especially helpful for those with melasma or pigmentation issues. Sunscreen should always be removed at night to allow the skin to recover. Ultimately, the most effective sunscreen is the one you use properly and regularly.