Do you know what SPF means and when it should be applied?

Do you know what SPF means? This abbreviation stands for Sun Protection Factor. Sun protection is an essential aspect of your skin care routine. However, its importance is often underestimated, due to misunderstanding of its importance and myths woven around SPF creams. Below, we will tell you what SPF creams are, why you should use them, and how to choose the best one for you.

What is SPF and when was it invented?

SPF is a measure of a sunscreen's effectiveness in preventing sunburn caused by solar radiation. The first sunscreen was invented in 1928 in Australia by a chemist and was called Hamilton Sun and Skin. In 1936, the founder of L'Oreal introduced his own version of SPF to the public, and one of the earliest sunscreens from a brand that can still be purchased today was invented in 1946, under the name Piz Buin. In 1962, it was proposed to create units of measurement for SPF.

So, SPF is a cream that contains sunscreens, which protect the skin against solar radiation. With the increasing awareness of the risks of sun exposure, SPF has become a standard in the cosmetic and skin care industry. Today, SPF is a common term, associated with the prevention of premature skin aging and skin cancer.

What does SPF 15 mean?

Products with SPF 15 are ideal for people with golden or tanned skin. This level of protection allows you to stay in the sun 15 times longer than without any protection. However, experts point out that SPF 15 only blocks 93% of UVB rays.

What does SPF 30 mean?

SPF 30 is recommended for fair-skinned people and helps block about 97% of UVB rays from the sun. This level of protection is extremely important for those planning to spend extended periods of time at the beach or simply outdoors.

What does SPF 50 mean?

SPF 50 offers the highest level of protection recommended for daily use and is ideal for very fair skin or in conditions with a high UV index. This level of protection can block approximately 98% of UVB rays. It is also the recommended protection for babies and young children for families going on vacation to the beach.

Why is SPF important?

The importance of using SPF is undeniable. Unprotected sun exposure can lead to sunburn, which is not only painful but also damages the skin's DNA. A tan is skin cells that have "died" to protect the layers beneath. Repeated sunburns and unprotected sun exposure increase the risk of skin cancer, including melanoma, one of the most aggressive forms of the disease.

In addition to health risks, unprotected exposure to UV rays contributes to premature skin aging. UV rays penetrate the skin and destroy collagen and elastin, proteins essential for maintaining skin firmness and elasticity. The result is wrinkles, age spots and a rough skin texture. Regular use of a product with SPF not only protects against sunburn, but also helps maintain a youthful and healthy complexion.

SPF Controversies and Myths That Have Been Debunked

Despite the obvious benefits of using SPF, there are many controversies and myths that have arisen over the years. One of the most common myths is that someone with dark skin doesn't need sunscreen. While it's true that skin with more melanin has greater natural protection against UV rays, it's not enough to prevent all sun damage, including skin cancer.

Another common myth is that products with a very high SPF, such as SPF 50 or SPF 100, provide full protection and do not require reapplication. In reality, no product offers 100% protection against UV rays, and regular reapplication is essential, especially after swimming or outdoor sports.

There is also an ongoing debate about the chemical ingredients in sunscreens and their possible health effects. Studies show that all of these ingredients are safe and can be safely used daily, even when it comes to multiple applications.

How many types of SPF are there?

SPF can be classified according to several criteria, including the type of filter (chemical or physical) and the level of protection provided. Products with chemical filters contain substances that absorb UV rays and convert them into heat, while physical filters, such as zinc oxide or titanium dioxide, reflect UV rays from the skin's surface.

Depending on the level of protection, SPF can range from a factor of 5, which offers almost no protection, to 50+ for very high protection (50+ can also mean SPF 100). Choosing the right SPF depends on your skin type, how much time you spend in the sun, and what activities you are doing.

There are also SPF products specially formulated for various needs, such as those for sensitive skin, for children, or those that are water-resistant. These products are developed to meet the specific requirements of different skin types and environmental conditions.

How and when do you apply SPF?

Applying SPF correctly is just as important as choosing the right product. For optimal protection, SPF should be applied about 15-30 minutes before sun exposure. This allows the product to absorb into the skin and begin providing protection.

It is essential to apply a generous amount of product, covering all areas exposed to the sun, including the ears, the back of the neck and the backs of the hands. A common mistake is to apply too little product, which reduces the effectiveness of the protection. As a rule, 1.25 ml of sunscreen is needed for the face and neck, and about a small shot glass for the whole body.

Reapplication is crucial, especially if you spend a lot of time outside or if you swim or sweat. In general, SPF should be reapplied every two hours to maintain the level of protection indicated on the label. Even if you use a water-resistant product, it should be reapplied immediately after getting out of the water.

How do you choose the right SPF?

Choosing the right SPF for you can seem complicated, given the many options available. First, you need to consider your skin type.

If you have sensitive or allergic skin, it is recommended to choose a product with physical filters, which are less irritating. For oily or acne-prone skin, there are non-comedogenic formulas, which do not block pores. The texture of the product is also important; thicker creams are ideal for dry skin, while gels or sprays are more suitable for oily or combination skin.

Another aspect to consider is the environment you are in. If you spend a lot of time at the beach or outdoors, a high SPF and water resistance is essential.

So now you know what SPF means and that sun protection is not just a fad, but a necessity for maintaining long-term skin health. Choosing and using the right SPF is essential to preventing damage from sun exposure.

Sources:

• https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/myth-or-fact-coconut-is-an-effective-sunscreen
• https://newsnetwork.mayoclinic.org/discussion/mayo-clinic-q-and-a-apply-sunscreen-generously-and-frequently-for-full-protection/
• https://www.mayoclinic.org/drugs-supplements/sunscreen-agent-topical-application-route/proper-use/drg-20070255?p=1