Many people tend to underestimate or incorrectly apply sunscreen, which can reduce its effectiveness in protecting the skin from harmful UV rays. According to dermatologists, a generous application covering all exposed areas is essential, usually about one ounce (roughly a shot glass full) per full-body coverage. It's important to remember that sunscreen should be applied 15 to 30 minutes before sun exposure to allow it to absorb properly, and it needs to be reapplied every two hours or immediately after swimming or sweating. Most people only apply half or less the recommended amount, which can significantly decrease the SPF protection level. In addition, choosing a broad-spectrum sunscreen that protects against both UVA and UVB rays and has an SPF of at least 30 is advisable for daily use. This is particularly crucial for individuals with fair skin, a history of sunburns, or those living in sunny climates. When applying sunscreen, ensure you cover often-missed spots such as the back of the neck, ears, tops of the feet, and the backs of the hands. Using a generous, even layer helps maximize protection. Personal experience has shown that incorporating sunscreen into your daily skincare routine, such as after moisturizing, makes it easier to remember and less of a hassle. Combining it with other sun-protective measures like wearing hats, sunglasses, and seeking shade during peak hours further enhances skin safety. Overall, understanding the actual amount of sunscreen needed and applying it properly can make a significant difference in preventing skin damage and reducing the risk of skin cancer.