{"id":11107,"date":"2025-06-24T09:15:50","date_gmt":"2025-06-24T09:15:50","guid":{"rendered":"https:\/\/www.isdin.com\/us\/blog\/?p=11107"},"modified":"2025-06-25T13:00:58","modified_gmt":"2025-06-25T13:00:58","slug":"spf-glossary-decode-your-sunscreen-label","status":"publish","type":"post","link":"https:\/\/www.isdin.com\/us\/blog\/skincare\/spf-glossary-decode-your-sunscreen-label\/","title":{"rendered":"The Ultimate SPF Glossary: Understanding Your Sunscreen Label"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading:<\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p><\/p>\n\n\n\n<p>Every day is a chance to take care of your skin\u2014and wearing sunscreen is one of the most powerful skincare habits you can build. But with so many <strong>symbols, acronyms, and claims on the label<\/strong>, it\u2019s easy to feel a little lost. That\u2019s why we\u2019ve created this simple, science-backed sunscreen glossary\u2014to help you confidently <strong>decode your sunscreen<\/strong> and choose the protection that\u2019s right for your skin.<\/p>\n\n\n\n<p>Whether you&#8217;re a skincare enthusiast or just starting your sun protection journey, this guide has everything you need to know. Let\u2019s dive in.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-first-things-first-key-sunscreen-facts-to-know\">First things first: key sunscreen facts to know<\/h2>\n\n\n\n<p>Let\u2019s start with some FAQs using guidance from the <a href=\"https:\/\/www.aad.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">American Academy of Dermatology<\/a> (AAD). These are the essential terms you\u2019ll see on almost every sunscreen bottle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-does-spf-mean\">What does SPF mean?<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"618\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/Water-resistant-sunscreen.jpg\" alt=\"Water resistant sunscreen\" class=\"wp-image-11109 lazyload\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>SPF stands for <strong>Sun Protection Factor<\/strong>. And contrary to popular belief, it\u2019s <strong>not a measurement of time<\/strong>, but instead, an <em>amount.<\/em> To sum up the science, it measures the amount of solar energy needed to burn unprotected skin.<\/p>\n\n\n\n<p>The number refers to how well your sunscreen helps <strong>protect your skin from UVB rays<\/strong> versus if you went without it. As the SPF number increases, so does your protection against sunburn.<\/p>\n\n\n\n<p>However, <strong>a high number doesn\u2019t mean you\u2019re in the clear.<\/strong> The amount of SPF skin protection also depends on your skin type, how strong the sun is, and how frequently you apply (the right amount of) sunscreen.<\/p>\n\n\n\n<p class=\"has-background\" style=\"background-color:#d6a24257\"><strong>Pro tip:<\/strong> Opt for <strong>SPF 30 or higher<\/strong>\u2014that\u2019s what <a href=\"https:\/\/www.isdin.com\/us\/blog\/expert-advice\/dermatology\/dermatologist-recommended-sunscreens\/\">dermatologists recommend<\/a> for daily use.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-uva-vs-uvb-protection\">UVA vs. UVB protection<\/h3>\n\n\n\n<p>Both types of ultraviolet radiation can be harmful, but they act differently:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>UVA<\/strong> rays penetrate deeper into the skin and are linked to premature aging (<strong>AKA<\/strong> <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/what-is-photoaging-and-why-do-we-have-to-care-about-it\/\"><strong>photoaging<\/strong><\/a>) and some skin cancers. They can also <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/sunscreen-faqs-your-questions-answered\/\">reach your skin indoors<\/a>.<\/li>\n\n\n\n<li><strong>UVB<\/strong> rays mostly affect the surface layers, causing <strong>sunburns<\/strong> and increasing skin cancer risk. They\u2019re at their strongest when your shadow\u2019s at its smallest (i.e. peak <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/summer-skincare-routine\/\">summertime<\/a>).<\/li>\n<\/ul>\n\n\n\n<p>The good news? A <strong>broad spectrum sunscreen<\/strong> protects you from <strong>both<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-speaking-of-what-is-broad-spectrum-sunscreen\">Speaking of, what is broad spectrum sunscreen?<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"618\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/What-broad-spectrum-sunscreen-means.jpg\" alt=\"What broad spectrum sunscreen means\" class=\"wp-image-11110 lazyload\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Broad spectrum means the sunscreen shields your skin from <strong>both UVA and UVB rays<\/strong>. This is a critical label to look for\u2014<strong>it\u2019s the only type of <a href=\"https:\/\/www.aad.org\/public\/everyday-care\/sun-protection\/shade-clothing-sunscreen\/how-to-select-sunscreen\" target=\"_blank\" rel=\"noreferrer noopener\">sunscreen the AAD recommends<\/a>.<\/strong> If it doesn\u2019t say broad spectrum, it\u2019s not giving you complete protection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mineral-vs-chemical-sunscreen\">Mineral vs. chemical sunscreen<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"618\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/SPF-glossary-chemical-vs-mineral-sunscreen.jpg\" alt=\"SPF glossary chemical vs mineral sunscreen\" class=\"wp-image-11111 lazyload\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The main difference lies in how they filter UV rays:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mineral (AKA physical) sunscreens<\/strong> use ingredients like <strong>zinc oxide<\/strong> and <strong>titanium dioxide<\/strong> to physically reflect rays off the skin.<\/li>\n\n\n\n<li><strong>Chemical sunscreens<\/strong> capture UV rays, convert them into heat, and expel them back out.<\/li>\n<\/ul>\n\n\n\n<p>Both types are effective, and some formulas even combine both.<\/p>\n\n\n\n<p class=\"has-background\" style=\"background-color:#d6a24257\">Want to learn all the ins and outs? Check out our full guide on <strong><a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/mineral-vs-chemical-sunscreen\/\">mineral vs. chemical sunscreens<\/a>.<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-water-resistant-sunscreen\">Water-resistant sunscreen<\/h3>\n\n\n\n<p>Spoiler alert: <strong>No sunscreen is truly waterproof.<\/strong> If a product is <a href=\"https:\/\/www.isdin.com\/us\/p\/actinica-34-fl-oz\/2794\">water-resistant<\/a>, it means its SPF was tested to remain effective <strong>after 40 or 80 minutes<\/strong> in water or while sweating.<\/p>\n\n\n\n<p>Always check the label\u2014and <strong>reapply regularly<\/strong>, especially after swimming, sweating, or towel drying.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-your-sunscreen-glossary-a-to-zinc\">Your sunscreen glossary: A to zinc<\/h2>\n\n\n\n<p>Here\u2019s your go-to guide to decoding your sunscreen label\u2014including a few extra features and ingredients along the way. Use it while you shop, apply, or refresh your routine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-360-protection\">360\u00b0 protection<\/h3>\n\n\n\n<p>ISDIN\u2019s holistic approach to sun protection offers all-around care for daily exposure to environmental factors. It\u2019s designed to combat both photoaging and <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/your-skin\/how-pollution-affects-your-skin\/\">pollution<\/a>, plus damage from blue light, <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/how-climate-affects-your-skin\/\">heat<\/a>, and free radicals.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-actinic-damage\">Actinic damage<\/h3>\n\n\n\n<p>Damage caused by long-term UV exposure, especially from the sun. Signs can include fine lines, <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/anti-aging\/how-to-treat-dark-spots-on-your-skin\/\">sun spots<\/a>, and an increased risk of more serious concerns such as <a href=\"https:\/\/www.isdin.com\/us\/blog\/your-skin\/what-is-actinic-keratosis\/\">actinic keratosis<\/a> or <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/what-is-melanoma-and-how-to-detect-it\/\">skin cancer<\/a>. <strong>Daily sunscreen use is key to prevention<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-active-ingredient\">Active ingredient<\/h3>\n\n\n\n<p>These are the UV filters that work to protect your skin. On the label, you\u2019re likely to find ingredients like <strong>zinc oxide<\/strong>, <strong>avobenzone<\/strong>, or <strong>octocrylene<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-antioxidants\">Antioxidants<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.isdin.com\/us\/blog\/isdinnovation\/what-is-vitamin-e-in-skincare\/\">Vitamin E<\/a>, botanical extracts\u2014<a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/antioxidants-in-sunscreen\/\">antioxidants in sunscreen<\/a> help to support skin\u2019s natural defenses and fight the effects of daily <a href=\"https:\/\/www.isdin.com\/us\/blog\/expert-advice\/dermatology\/what-is-the-exposome-and-why-it-is-important-to-protect-yourself-from-the-sun\/\">environmental stressors<\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-broad-spectrum\">Broad spectrum<\/h3>\n\n\n\n<p>As covered above, this label means the sunscreen shields against <strong>both UVA and UVB rays<\/strong>. It\u2019s a must-have for full sun protection.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-\"><\/h3>\n\n\n\n<div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\">\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dna-repairsomes\">DNA Repairsomes\u00ae<\/h3>\n\n\n\n<p>Plankton-derived technology that helps repair existing sun damage. Found in innovative formulas like <a href=\"https:\/\/www.isdin.com\/us\/p\/actinica-34-fl-oz\/2794\"><strong>Eryfotona Actinica<\/strong><\/a> and <a href=\"https:\/\/www.isdin.com\/us\/p\/ageless-34-fl-oz\/3431\"><strong>Eryfotona Ageless<\/strong><\/a>.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/www.isdin.com\/us\/p\/ageless-34-fl-oz\/3431\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"572\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/SPF-Glossary-Eryfotona-Ageless.jpg\" alt=\"SPF Glossary Eryfotona Ageless\" class=\"wp-image-11112 size-full lazyload\"\/><\/a><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-drug-facts\">Drug Facts<\/h3>\n\n\n\n<p>In the US, sunscreens are regulated by the <a href=\"https:\/\/www.fda.gov\/\" target=\"_blank\" rel=\"noreferrer noopener\">FDA<\/a> as <strong>over-the-counter (OTC) drugs<\/strong>. The label\u2019s <strong>Drug Facts<\/strong> panel lists active ingredients and usage directions\u2014always a must-read.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-facial-sunscreen\">Facial sunscreen<\/h3>\n\n\n\n<p>Specifically formulated for the delicate skin on your face\u2014often <strong>lighter<\/strong>, <strong>non-comedogenic<\/strong>, and more <strong>targeted<\/strong> than body sunscreens. Choose one that suits <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/how-to-identify-your-skin-type\/\">your skin type<\/a> for everyday wear.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"618\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/SPF-Glossary-Facial-Sunscreen.jpg\" alt=\"SPF Glossary Facial Sunscreen\" class=\"wp-image-11113 lazyload\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mineral-sunscreen\">Mineral sunscreen<\/h3>\n\n\n\n<p>A sunscreen that uses natural minerals (like <strong>zinc oxide<\/strong>) to deflect UV rays from the skin\u2019s surface. Sometimes preferred by those with very <strong>sensitive skin<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-non-comedogenic\">Non-comedogenic<\/h3>\n\n\n\n<p>This means the product is <strong>formulated not to clog pores<\/strong>, making it ideal for blemish-prone or oily skin. ISDIN\u2019s facial sunscreens are non-comedogenic and suitable for all skin types.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-peptides\">Peptides<\/h3>\n\n\n\n<p>Short chains of amino acids that support skin repair and firmness. You\u2019ll find them in some <a href=\"https:\/\/www.isdin.com\/us\/blog\/isdinnovation\/whats-the-difference-isdin-eryfotona-actinica-and-eryfotona-ageless\/\"><strong>expert sunscreens<\/strong><\/a> that combine protection with skincare.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-photoaging\">Photoaging<\/h3>\n\n\n\n<p>The visible signs of aging caused by sun exposure. Think <strong>fine lines<\/strong>, <strong>dark spots<\/strong>, <strong>rough texture<\/strong>\u2014daily sunscreen (especially a <a href=\"https:\/\/www.isdin.com\/us\/p\/ageless-34-fl-oz\/3431\">targeted formula<\/a>) is your best defense.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-spf-sun-protection-factor\">SPF (Sun Protection Factor)<\/h3>\n\n\n\n<p>The measure of UVB protection your sunscreen offers. Remember: SPF 30 blocks about <a href=\"https:\/\/www.aoncology.com\/2024\/07\/12\/choosing-the-right-sunscreen-for-you\/\" target=\"_blank\" rel=\"noreferrer noopener\">97%<\/a> of UVB rays, and SPF 50 blocks about 98%. <strong>Reapply at least every two hours<\/strong>, no matter the number.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"618\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/Women-on-the-beach.jpg\" alt=\"Women on the beach\" class=\"wp-image-11114 lazyload\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sunscreen-for-oily-skin\">Sunscreen for oily skin<\/h3>\n\n\n\n<p>Lightweight, non-greasy, and non-comedogenic formulas that won\u2019t clog pores\u2014like <a href=\"https:\/\/www.isdin.com\/us\/c\/sun-care\/face-sunscreens\">ISDIN facial sunscreens<\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sunscreen-for-sensitive-skin\">Sunscreen for sensitive skin<\/h3>\n\n\n\n<p>Gentle formulas that are tested on all skin types and recommended by dermatologists. Oftentimes, <a href=\"https:\/\/www.isdin.com\/us\/c\/sun-care\/mineral-sunscreens\">mineral-based formulas<\/a> are the ideal option.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-water-resistant\">Water-resistant<\/h3>\n\n\n\n<p>Indicates the sunscreen has been tested to remain effective <strong>after water exposure<\/strong>\u2014usually for 40 or 80 minutes. Still, reapplying is key after swimming, sweating, or towel drying.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-default\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-zinc-oxide\">Zinc oxide<\/h3>\n\n\n\n<p>A <strong>mineral UV filter<\/strong> used in physical sunscreens. Known for its excellent <strong>sun protection<\/strong>, especially for <a data-l-s=\"28209\" href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/sensitive-skin-routine\/\">sensitive<\/a> or blemish-prone skin.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-read-your-sunscreen-label-the-final-checklist\">How to read your sunscreen label: the final checklist<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"618\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-src=\"https:\/\/www.isdin.com\/us\/blog\/wp-content\/uploads\/2025\/06\/SPF-Glossary-woman-with-sunscreen.jpg\" alt=\"SPF Glossary woman with sunscreen\" class=\"wp-image-11115 lazyload\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>When choosing your sunscreen, <strong>here are the must-haves to look for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPF 30 or higher<\/li>\n\n\n\n<li>Broad spectrum protection<\/li>\n\n\n\n<li>Non-comedogenic<\/li>\n\n\n\n<li>Dermatologist tested<\/li>\n\n\n\n<li>Additional features like water resistance or antioxidant action? Bonus!<\/li>\n<\/ul>\n\n\n\n<p>Now that you know the ins and outs of your sunscreen label, you\u2019re better equipped to care for your skin with intention\u2014every single day. Choose the formula that works best for you, <a href=\"https:\/\/www.isdin.com\/us\/blog\/skincare\/how-to-properly-apply-sunscreen\/\">apply generously<\/a>, and reapply often. Because it all comes down to <strong>protecting what matters most: your skin, your health, and your joy.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Symbols, acronyms, claims\u2014use this SPF glossary to confidently decode your sunscreen and choose the protection that\u2019s right for your skin.<\/p>\n","protected":false},"author":63,"featured_media":11108,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[2461,2459],"tags":[2041,2042],"class_list":["post-11107","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-skincare","category-sun-protection","tag-sun-protection","tag-sunscreen","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.4 (Yoast SEO v25.5) - 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Ingraham","author_link":"https:\/\/www.isdin.com\/us\/blog\/author\/amy-ingraham\/"},"uagb_comment_info":0,"uagb_excerpt":"Symbols, acronyms, claims\u2014use this SPF glossary to confidently decode your sunscreen and choose the protection that\u2019s right for your 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