Is it necessary to apply sunscreen every day?
Sun exposure has well-known benefits, including vitamin D synthesis, a process that is essential for bone health. However, prolonged or inappropriate exposure to ultraviolet (UV) radiation can cause cumulative damage to the skin that should not be underestimated.
Skin cancer is among the most common types of cancer worldwide. A study published in the *International Journal of Cancer* in 2025 estimated that in 2022, more than 80% of global cases of cutaneous melanoma were attributable to exposure to ultraviolet (UV) radiation, the primary risk factor associated with sun exposure.
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To reduce the risk of skin cancer, it is important to recognize that one of its main risk factors is preventable and is associated with excessive exposure to ultraviolet radiation. Taking sun protection measures—such as avoiding sun exposure during peak hours, wearing clothing that covers the skin, and applying broad-spectrum sunscreen—is part of the strategies recommended by health organizations.
UV radiation can affect the skin even when there is no direct exposure, such as when standing under a beach umbrella or indoors in natural light. Although glass blocks most UVB rays, it allows a significant proportion of UVA rays to pass through, which also contribute to skin aging and cumulative damage. On cloudy days, a significant amount of ultraviolet radiation continues to pass through the atmosphere.
Given these factors, dermatologists recommend incorporating the use of sunscreen into your daily skincare routine. They also warn that applying it just once a day is not enough, since its effectiveness diminishes over time due to absorption, perspiration, and friction. Whether indoors with exposure to natural light or outdoors, it is recommended to reapply the product every two to four hours, especially if there is direct sun exposure.
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How do you choose the right sunscreen?
Before choosing a sunscreen, it's important to understand what SPF means. The sun protection factor measures protection against UVB radiation, which causes sunburn. Experts recommend using a product with an SPF of 30 or higher, as it can block about 96% of UVB rays when applied correctly.
Regular use of sunscreen helps prevent photoaging and reduces the risk of skin cancer, and it is especially important for people with sun-sensitive conditions. When choosing a sunscreen, it is recommended to opt for broad-spectrum protection and select formulas suitable for the face and body based on your skin type and daily activities.
Cruelty-Free Options
Currently, there are several brands that offer sun protection products certified as cruelty-free, making it easier to incorporate these types of products into your daily routine. Among the brands available in various countries, including parts of Latin America, are Sun Bum, Hawaiian Tropic, Australian Gold, Garnier, and Supergoop!
To supplement this information, you can read the article on four year-round skincare products and "It's Winter! But We Still Need to Use Sunscreen" , which present various options that allow you to maintain a consistent routine tailored to different needs.
In any case, check out our Cruelty-Free Lists, using the “sunscreen” filter for more information.
