{"id":7984,"date":"2026-03-20T12:56:17","date_gmt":"2026-03-20T12:56:17","guid":{"rendered":"https:\/\/wmlearnver2.wpengine.com\/?p=7984"},"modified":"2026-03-23T15:40:19","modified_gmt":"2026-03-23T15:40:19","slug":"how-to-read-a-coa-cannabis","status":"publish","type":"post","link":"https:\/\/weedmaps.com\/learn\/products-and-how-to-consume\/how-to-read-a-coa-cannabis","title":{"rendered":"How to read a COA before you buy: interpreting cannabinoid percentages and terpene data"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?ssl=1\" data-modal-open=\"lightbox_7985\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?w=1024&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?resize=768%2C432&ssl=1 768w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"cannabis, microscope, and beakers\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><cite>Photo by: Gina Coleman\/Weedmaps<\/cite><\/figure>\t\t\t<div id=\"lightbox_7985\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?w=1024&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?resize=300%2C169&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-104.png?resize=768%2C432&ssl=1 768w\" sizes=\"100vw\" alt=\"cannabis, microscope, and beakers\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/weedmaps.com\/learn\/products-and-how-to-consume\/how-to-read-cannabis-coa\">cannabis COA<\/a> can look like a wall of numbers \u2014 but it's actually one of the most useful tools you have as a buyer once you know what to look for.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That document, the Certificate of Analysis (COA), shows what's actually in a <a href=\"https:\/\/weedmaps.com\/products\">cannabis product <\/a>beyond the label. It breaks down <a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/thc-percentage-vs-cannabis-quality\">potency<\/a>, <a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/terpenes-in-cannabis-concentrates-why-they-matter\">terpene content,<\/a> and safety testing using verified lab data instead of marketing claims.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At first glance, it's dense. Percentages, unfamiliar terms, multiple sections. But once you understand how to read it, a COA becomes a quick way to compare products, verify quality, and spot differences that aren't obvious on the package.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The value isn't in the numbers themselves \u2014 it's in knowing which ones matter and how to interpret them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once that clicks, you're not guessing anymore. You're reading the product the same way the lab does.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/wmaps.app.link\/Z0SRfnrGF1b\">Shop lab tested strains near you<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What a COA actually shows<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A COA is a third-party lab report that breaks down exactly what's in a cannabis product \u2014 from cannabinoids and terpenes to contaminants and batch data.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/cannabinoid\">Cannabinoid content (THC, THCA, CBD, etc.)<\/a><\/li>\n\n\n\n<li>Terpene profile<\/li>\n\n\n\n<li>Testing results for contaminants (pesticides, heavy metals, solvents)<\/li>\n\n\n\n<li>Batch and testing information<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For most consumers, the most useful sections are <a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/entourage-effect\">cannabinoids and terpenes<\/a>. These give you a clear snapshot of potency and overall composition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A COA verifies that what's being sold matches what's actually in the product.<\/p>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?ssl=1\" data-modal-open=\"lightbox_7987\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?fit=640%2C640&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?w=1600&ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=300%2C300&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=1024%2C1024&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=150%2C150&ssl=1 150w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=768%2C768&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=1536%2C1536&ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=1080%2C1080&ssl=1 1080w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?w=1280&ssl=1 1280w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><\/figure>\t\t\t<div id=\"lightbox_7987\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?fit=640%2C640&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?w=1600&ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=300%2C300&ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=1024%2C1024&ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=150%2C150&ssl=1 150w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=768%2C768&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=1536%2C1536&ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?resize=1080%2C1080&ssl=1 1080w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-106.png?w=1280&ssl=1 1280w\" sizes=\"100vw\" alt=\"\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<h2 class=\"wp-block-heading\">How labs measure cannabinoid potency<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most labs use high-performance liquid chromatography (HPLC) to measure cannabinoids. This method allows them to detect compounds like <a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/what-is-thca-in-cannabis-flower\">THCA<\/a> and<a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/tetrahydrocannabinol-thc\"> delta-9 THC<\/a> separately without applying heat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That distinction matters because cannabis naturally contains more THCA than THC before it's consumed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lab results usually show:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>THCA percentage<\/li>\n\n\n\n<li>Delta-9 THC percentage<\/li>\n\n\n\n<li>Other cannabinoids (CBD, CBG, etc.)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These values reflect the product in its current state, not after it's been heated.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What THC %, THCA %, and total THC mean<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">COAs list both THCA and THC, and that's where a lot of confusion starts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">THCA is the precursor to THC. When heat is applied, it converts into THC through decarboxylation. To estimate total potential THC, labs use a standard formula:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Total THC = (THCA \u00d7 0.877) + THC<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 0.877 factor accounts for the molecular weight lost during conversion.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In practical terms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>THCA shows potential THC<\/li>\n\n\n\n<li>THC shows what's already active<\/li>\n\n\n\n<li>Total THC estimates maximum potency after heating<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to read terpene data<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/terpenes\">Terpenes are aromatic compounds<\/a> that contribute to a product's flavor, aroma, and overall profile.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A COA may list:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/myrcene\">Myrcene<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/limonene\">Limonene<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/caryophyllene\">Caryophyllene<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/pinene\">Pinene<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Along with their percentages.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Higher terpene content can indicate a more aromatic product, while the specific mix helps explain differences between strains or batches.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to use a COA to compare products<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A COA becomes most useful when comparing products side by side.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead of focusing only on THC percentage, look at:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Total THC for overall potency<\/li>\n\n\n\n<li>Cannabinoid balance (THC vs CBD vs minor cannabinoids)<\/li>\n\n\n\n<li>Terpene content for flavor and quality<\/li>\n\n\n\n<li>Consistency across batches<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Two products with similar THC percentages can still differ in composition. A COA helps you see those differences clearly and make more informed decisions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to spot green and red flags in a COA<\/h2>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?ssl=1\" data-modal-open=\"lightbox_7986\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?w=768&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?resize=300%2C169&ssl=1 300w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><\/figure>\t\t\t<div id=\"lightbox_7986\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?fit=640%2C360&ssl=1\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?w=768&ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-105.png?resize=300%2C169&ssl=1 300w\" sizes=\"100vw\" alt=\"\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/does-cannabis-need-to-be-tested\"><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Not all COAs reflect the same level of product quality \u2014 and some tell you a lot more than others. Once you know what to look for, it becomes easier to identify well-tested products.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Signs of a high-quality COA include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clear cannabinoid and terpene breakdowns<\/li>\n\n\n\n<li>Recent testing dates<\/li>\n\n\n\n<li>Batch numbers that match the product listing<\/li>\n\n\n\n<li>Consistent results across similar batches<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Red flags to watch for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Missing terpene data<\/li>\n\n\n\n<li>Outdated test results<\/li>\n\n\n\n<li>Large gaps between labeled potency and lab results<\/li>\n\n\n\n<li>Incomplete or hard-to-read reports<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A reliable COA should feel transparent and easy to verify.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why COAs matter when buying cannabis<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A COA gives you information that packaging and product descriptions often leave out.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two products may advertise similar THC percentages but differ in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Total cannabinoid content<\/li>\n\n\n\n<li>Terpene composition<\/li>\n\n\n\n<li>Overall consistency<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Without a COA, those differences aren't visible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For consumers, this means a COA is one of the most useful tools for moving beyond marketing claims and evaluating products based on verified data.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The bottom line<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/wmaps.app.link\/Z3DrXfzGF1b\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"640\" height=\"213\" src=\"https:\/\/i0.wp.com\/wmlearnver2.wpengine.com\/wp-content\/uploads\/2026\/03\/image-107-1024x341.png?resize=640%2C213&#038;ssl=1\" alt=\"\" class=\"wp-image-7988\" srcset=\"https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?resize=1024%2C341&amp;ssl=1 1024w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?resize=300%2C100&amp;ssl=1 300w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?resize=768%2C256&amp;ssl=1 768w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?resize=1536%2C512&amp;ssl=1 1536w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?resize=1080%2C360&amp;ssl=1 1080w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?w=1600&amp;ssl=1 1600w, https:\/\/i0.wp.com\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-107.png?w=1280&amp;ssl=1 1280w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A COA turns complex lab data into something practical. It shows what's in a cannabis product, how potent it is, and how consistent it may be from batch to batch. Understanding cannabinoid percentages helps you estimate potency, while terpene data adds context around flavor and product quality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you know how to read a COA, you can compare products more confidently and make decisions based on verified information instead of guesswork.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Order <a href=\"https:\/\/wmaps.app.link\/qNGjEpEGF1b\">cannabis products<\/a> for pickup or <a href=\"https:\/\/wmaps.app.link\/ruD1wLKGF1b\">delivery<\/a> from a <a href=\"https:\/\/wmaps.app.link\/DjBEVXPGF1b\">dispensary<\/a> near you on Weedmaps.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A cannabis COA can look like a wall of numbers \u2014 but it's actually one of the most useful tools you have as a buyer once you know what to look for. That document, the Certificate of Analysis (COA), shows what's actually in a cannabis...<\/p>\n","protected":false},"author":78,"featured_media":7985,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[183],"tags":[316,1441,2360,2389,2407,2412,2418,2419,2454,2455],"class_list":["post-7984","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products-and-how-to-consume","tag-thc-percentage","tag-cannabis-lab-testing","tag-terpene-profile","tag-total-thc","tag-certificate-of-analysis","tag-cannabis-coa","tag-how-to-read-coa","tag-cannabis-testing","tag-cannabis-quality","tag-coa-lab-report"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to read a COA before you buy: interpreting cannabinoid percentages and terpene data | Weedmaps<\/title>\n<meta name=\"description\" content=\"Learn how to read a cannabis COA, including THC %, total THC, terpene data, and lab results so you can evaluate product quality before you buy. 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