As a dermatologist, I have seen firsthand the damaging effects of UV rays on the skin. With summer just around the corner, it is important to educate ourselves on the importance of protecting our skin from the sun. This is where sunscreen and sunblock with SPF come into play.
The Difference Between Sunscreen and Sunblock
Before we dive into the necessity of wearing both sunscreen and sunblock with SPF, it is important to understand the difference between the two. While both products serve the same purpose, they work in different ways.Sunscreen
is a chemical-based product that absorbs UV rays before they can penetrate the skin.It contains active ingredients such as avobenzone, octinoxate, and oxybenzone that work together to create a protective layer on the skin. This layer absorbs UV rays and converts them into heat, which is then released from the body.
Sunblock
, on the other hand, is a physical barrier that reflects UV rays away from the skin. It contains ingredients such as zinc oxide and titanium dioxide that sit on top of the skin and act as a shield against UV rays. Unlike sunscreen, sunblock does not get absorbed into the skin.The Importance of SPF
SPF stands for Sun Protection Factor, which is a measure of how well a product protects our skin from UVB rays.The higher the SPF number, the more protection it provides. For example, an SPF 30 sunscreen will block about 97% of UVB rays, while an SPF 50 sunscreen will block about 98% of UVB rays. It is important to note that SPF only measures protection against UVB rays, which are responsible for causing sunburns. However, UVA rays, which are responsible for premature aging and skin cancer, can also penetrate the skin. This is why it is important to look for a broad-spectrum sunscreen or sunblock that protects against both UVA and UVB rays.
The Necessity of Wearing Sunscreen and Sunblock with SPF
Now that we understand the difference between sunscreen and sunblock and the importance of SPF, let's address the question at hand - is it necessary to wear both sunscreen and sunblock with SPF at the same time?The short answer is yes.While both products provide protection against UV rays, they work in different ways. By wearing both sunscreen and sunblock with SPF, you are providing your skin with double protection. Sunscreen will absorb UV rays before they can penetrate the skin, while sunblock will act as a physical barrier against UV rays. Moreover, wearing both products together can also provide better coverage. Sunscreen can sometimes miss spots on the skin, especially if it is not applied evenly.
By using sunblock on top of sunscreen, you can ensure that all areas of your skin are protected. Additionally, wearing both sunscreen and sunblock with SPF can also provide longer-lasting protection. Sunscreen needs to be reapplied every two hours or after swimming or sweating, while sunblock can last longer on the skin. By using both products together, you can extend the time between reapplications.
Other Sun Protection Tips
While wearing sunscreen and sunblock with SPF is crucial for protecting our skin from the sun, there are other measures we can take to further protect ourselves.Limit sun exposure:
The best way to protect our skin from the sun is to limit our exposure. Avoid spending long periods of time in direct sunlight, especially during peak hours when the sun's rays are the strongest.Wear protective clothing:
Wearing long-sleeved shirts, pants, and hats can provide additional protection from the sun.Look for clothing with UPF (Ultraviolet Protection Factor) for added protection.
