SPF stands for sun protection factor. This is a measure of how well the sunscreen deflects UVB rays. Currently, there’s no standard for measuring UVA protection. Manufacturers calculate SPF based on how long it takes to sunburn skin that’s been treated with the sunscreen as compared with skin that hasn’t been treated with sunscreen. Theoretically, […]
![photo credit - fineartamerica [dot] com](https://i0.wp.com/cikipedia.com/wp-content/uploads/2012/07/suntanned-woman-showing-tan-lines-oleksiy-maksymenko2-100x100.jpeg "Does the best sunscreen also have the highest SPF?")