Sun protection is a critical component of skincare, especially during the summer months when the sun’s rays are strongest.

Despite widespread awareness, several misconceptions about sun protection can undermine its effectiveness and even lead to skin damage.

Here, Lykkers, we aim to address these misunderstandings and offer practical advice to help you protect your skin more effectively.

1. Does Higher SPF Mean Better Protection?

A common belief is that a higher SPF (Sun Protection Factor) provides better sun protection. While this is partly true, the benefits of extremely high SPF numbers can be misleading. Sunscreens with higher SPF values contain more chemical filters, which can increase the potential for skin irritation and other side effects.

In practical terms, SPF 30 to SPF 50 is generally sufficient for most people. For activities like going to the beach, hiking at high altitudes, or spending long hours outdoors, SPF 50+ with PA++++ (indicating broad-spectrum protection) is recommended. For daily indoor use or short commutes, SPF 30 with PA++ or PA+++ is adequate.

The UV Index (UVI) is another useful tool to assess sun exposure risk. This index, often included in weather forecasts, indicates the potential for skin damage. Even on cloudy or rainy days, or during winter months, it’s important to apply sunscreen if the UVI exceeds 2.

2. Is a Thin Layer of Sunscreen Enough?

Sunscreen effectiveness is based on applying a generous amount—specifically, 2 mg/cm² of skin. Research indicates that most people apply only about one-third to one-half of this recommended amount, significantly diminishing the sunscreen’s effectiveness.

For instance, if you apply only half the recommended amount of SPF 16 sunscreen, it will only provide protection equivalent to SPF 4.

To achieve the full SPF rating, apply sunscreen liberally. For the face, this typically means using an amount roughly equivalent to the size of a one-yuan coin. Be aware that the required amount may vary depending on the product’s density and your face’s size.

3. Do Sunscreen-Infused Products Replace Sunscreen?

Products like foundation or BB creams that claim to have sun protection can be convenient, but they are generally not sufficient on their own.

These products are often applied in smaller quantities than the amount needed to achieve their stated SPF. To ensure proper sun protection, it is recommended to apply a dedicated sunscreen before applying makeup.

For optimal results, apply sunscreen as the first step in your skincare routine, and then layer your sun-protective makeup over it.

4. How Often Should You Reapply Sunscreen?

The general guideline is to reapply sunscreen every 2 to 3 hours. However, this recommendation assumes typical conditions, including sweating, swimming, and physical contact.

If you are unsure whether you applied enough sunscreen initially, reapplying as needed is a good practice. There is no strict time limit—apply more sunscreen whenever you feel it is necessary, especially after activities that can remove or dilute the sunscreen.

5. Is Makeup Removal Necessary After Sunscreen Application?

The question of whether to remove sunscreen can be nuanced. A study from West China Hospital provides insights into the effectiveness of various cleansing methods.

Non-waterproof sunscreens can be removed with cleansing milk or makeup remover, while waterproof sunscreens require a makeup remover to be properly cleaned.

Using a dedicated makeup remover or cleansing oil may be necessary to thoroughly cleanse sunscreen from your skin, particularly if it is waterproof. Always ensure that your skin is clean to avoid any potential buildup or irritation.

6. Can Sunscreen Be Used Beyond Its Expiration Date?

Sunscreens typically have a shelf life of around 12 months after opening. Check the product’s packaging for its expiration date. Using sunscreen past its expiration can reduce its effectiveness.

If the product has been stored in high temperatures, direct sunlight, or a humid environment, or if its texture, color, or smell has changed, it is best to discard it and purchase a new one.

In Conclusion

Understanding and correcting common misconceptions about sun protection is crucial for maintaining skin health. Proper use of sunscreen, along with other sun safety measures such as wearing protective clothing and seeking shade, can significantly reduce the risk of sun-induced skin damage.

By adhering to these guidelines and applying sunscreen diligently, you can enjoy the outdoors while safeguarding your skin against harmful UV rays. Consistent sun protection not only helps prevent skin aging but also reduces the risk of skin cancer, contributing to overall skin health and well-being.