{"id":2045,"date":"2025-09-22T11:02:07","date_gmt":"2025-09-22T07:32:07","guid":{"rendered":"https:\/\/herbcure.ir\/high-fiber-diet\/"},"modified":"2026-06-01T13:31:49","modified_gmt":"2026-06-01T10:01:49","slug":"diabetes-diagnosis","status":"publish","type":"post","link":"https:\/\/herbcure.ir\/en\/diabetes-diagnosis\/","title":{"rendered":"Diabetes Diagnosis: Symptoms, Blood Tests, and How Doctors Detect Diabetes"},"content":{"rendered":"<p>Diabetes diagnosis is one of the most important steps in preventing serious long-term complications of this chronic metabolic disease. Many people live with type 2 diabetes or prediabetes for years without knowing it because symptoms may develop gradually or remain unnoticed. Early diabetes testing through blood glucose measurements and HbA1c evaluation can help identify the condition before complications affect the heart, kidneys, nerves, or eyes.<\/p>\n<p lang=\"en\">For a complete explanation of diabetes beyond testing\u2014including symptoms, types, treatment options, and prevention\u2014visit our pillar guide: [<a href=\"https:\/\/herbcure.ir\/en\/diabetes-causes-symptoms-treatment-prevention\/\">What is Diabetes? Symptoms, Types, Diagnosis, Treatment &amp; Prevention Guide]<\/a>.<\/p>\n<h2>What Is Diabetes?<\/h2>\n<p>Diabetes mellitus is a chronic condition in which blood glucose levels become abnormally high. This usually happens because the body does not produce enough insulin or cannot properly use insulin due to insulin resistance.<\/p>\n<p>Insulin is a hormone produced by the pancreas that helps glucose enter cells for energy production. When insulin function becomes impaired, glucose accumulates in the bloodstream, leading to hyperglycemia.<\/p>\n<p>According to the World Health Organization (WHO, 2024), more than 422 million people worldwide are living with diabetes.<\/p>\n<h2>Types of Diabetes<\/h2>\n<blockquote>\n<p lang=\"en\">Diabetes diagnosis is also important because different <a href=\"https:\/\/herbcure.ir\/en\/diabetes-types\/\">types of diabetes<\/a> may require different treatment plans and follow-up care.<\/p>\n<\/blockquote>\n<h3>Type 1 Diabetes<\/h3>\n<p>Type 1 diabetes occurs when the immune system attacks insulin-producing cells in the pancreas. It is commonly diagnosed in children, teenagers, and young adults.<\/p>\n<h3>Type 2 Diabetes<\/h3>\n<p>Type 2 diabetes is the most common form of diabetes and is strongly associated with insulin resistance, obesity, and physical inactivity. It develops gradually and may remain undiagnosed for years.<\/p>\n<h3>Gestational Diabetes<\/h3>\n<p>Gestational diabetes develops during pregnancy and usually resolves after childbirth. However, it increases the future risk of developing type 2 diabetes.<\/p>\n<h2>Diabetes Symptoms<\/h2>\n<p>Diabetes symptoms can vary depending on blood sugar levels. Common signs include:<\/p>\n<ul>\n<li>Excessive thirst<\/li>\n<li>Frequent urination<\/li>\n<li>Unexplained weight loss<\/li>\n<li>Fatigue<\/li>\n<li>Blurred vision<\/li>\n<li>Slow wound healing<\/li>\n<li>Frequent infections<\/li>\n<\/ul>\n<p>The Centers for Disease Control and Prevention (CDC, 2023) reports that many individuals with prediabetes experience no symptoms at all.<\/p>\n<blockquote>\n<p lang=\"en\">If you notice any of these warning signs, read our full guide to <a href=\"https:\/\/herbcure.ir\/en\/diabetes-symptoms-2\/\">diabetes symptoms<\/a> to understand early indicators, possible causes, and when to see a doctor.<\/p>\n<\/blockquote>\n<h2>How Is Diabetes Diagnosed?<\/h2>\n<p>Doctors diagnose diabetes using blood tests that measure glucose levels in the bloodstream. Several standardized laboratory tests are recommended by medical organizations such as the American Diabetes Association (ADA).<\/p>\n<h3>How is diabetes diagnosed?<\/h3>\n<p>Diabetes is usually diagnosed through blood tests such as fasting plasma glucose (FPG), HbA1c testing, and oral glucose tolerance testing (OGTT). Elevated blood sugar levels above established medical thresholds may indicate prediabetes or diabetes.<\/p>\n<h2>Main Tests Used for Diabetes Diagnosis<\/h2>\n<h3>1. Fasting Plasma Glucose Test (FPG)<\/h3>\n<p>This blood sugar test measures glucose levels after at least 8 hours of fasting.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Result<\/th>\n<th>Blood Sugar Level<\/th>\n<\/tr>\n<tr>\n<td>Normal<\/td>\n<td>Below 100 mg\/dL<\/td>\n<\/tr>\n<tr>\n<td>Prediabetes<\/td>\n<td>100\u2013125 mg\/dL<\/td>\n<\/tr>\n<tr>\n<td>Diabetes<\/td>\n<td>126 mg\/dL or higher<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>These criteria are recommended by the American Diabetes Association (ADA, 2024).<\/p>\n<h3>2. HbA1c Test<\/h3>\n<p>The HbA1c test reflects the average blood glucose level over the previous 2 to 3 months. It is widely used for both diabetes screening and long-term monitoring.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Result<\/th>\n<th>HbA1c Level<\/th>\n<\/tr>\n<tr>\n<td>Normal<\/td>\n<td>Below 5.7%<\/td>\n<\/tr>\n<tr>\n<td>Prediabetes<\/td>\n<td>5.7%\u20136.4%<\/td>\n<\/tr>\n<tr>\n<td>Diabetes<\/td>\n<td>6.5% or higher<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Mayo Clinic states that HbA1c testing is one of the most reliable methods for evaluating long-term blood sugar control (Mayo Clinic, 2024).<\/p>\n<h3>3. Oral Glucose Tolerance Test (OGTT)<\/h3>\n<p>The oral glucose tolerance test measures blood glucose before and two hours after drinking a glucose solution.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Result<\/th>\n<th>2-Hour Blood Sugar Level<\/th>\n<\/tr>\n<tr>\n<td>Normal<\/td>\n<td>Below 140 mg\/dL<\/td>\n<\/tr>\n<tr>\n<td>Prediabetes<\/td>\n<td>140\u2013199 mg\/dL<\/td>\n<\/tr>\n<tr>\n<td>Diabetes<\/td>\n<td>200 mg\/dL or higher<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Who Should Be Screened for Diabetes?<\/h2>\n<p>According to ADA and CDC guidelines, diabetes screening is recommended for:<\/p>\n<ul>\n<li>Adults over age 45<\/li>\n<li>Individuals with overweight or obesity<\/li>\n<li>People with a family history of diabetes<\/li>\n<li>Individuals with high blood pressure<\/li>\n<li>Women with a history of gestational diabetes<\/li>\n<li>Physically inactive individuals<\/li>\n<\/ul>\n<h2>Diabetes Statistics and Prevalence<\/h2>\n<p>The International Diabetes Federation estimates that approximately 10.5% of adults worldwide are living with diabetes (IDF, 2023).<\/p>\n<p>Research also suggests that nearly half of people with type 2 diabetes remain undiagnosed.<\/p>\n<h2>Risk Factors for Diabetes<\/h2>\n<ul>\n<li>Obesity<\/li>\n<li>Lack of physical activity<\/li>\n<li>High-sugar diet<\/li>\n<li>Family history<\/li>\n<li>Older age<\/li>\n<li>Insulin resistance<\/li>\n<\/ul>\n<h2>Prediabetes vs Diabetes<\/h2>\n<table>\n<tbody>\n<tr>\n<th>Feature<\/th>\n<th>Prediabetes<\/th>\n<th>Diabetes<\/th>\n<\/tr>\n<tr>\n<td>Blood Sugar Level<\/td>\n<td>Higher than normal<\/td>\n<td>Significantly elevated<\/td>\n<\/tr>\n<tr>\n<td>Reversibility<\/td>\n<td>Often reversible with lifestyle changes<\/td>\n<td>Usually requires ongoing treatment<\/td>\n<\/tr>\n<tr>\n<td>Complication Risk<\/td>\n<td>Lower<\/td>\n<td>Higher<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote>\n<p lang=\"en\">If you have prediabetes, evidence-based lifestyle changes can often improve <a href=\"https:\/\/herbcure.ir\/en\/diabetes-prevention-control\/\"><strong>blood sugar control<\/strong><\/a> and reduce the risk of developing type 2 diabetes.<\/p>\n<\/blockquote>\n<h2>Treatment After Diabetes Diagnosis<\/h2>\n<p>After diagnosing diabetes, treatment may include:<\/p>\n<ul>\n<li>Dietary changes<\/li>\n<li>Regular physical activity<\/li>\n<li>Weight loss<\/li>\n<li>Medications such as metformin<\/li>\n<li>Insulin therapy when necessary<\/li>\n<\/ul>\n<p>According to the National Institutes of Health (NIH, 2023), losing 5% to 7% of body weight can reduce the risk of progression from prediabetes to type 2 diabetes by up to 58%.<\/p>\n<blockquote>\n<p lang=\"en\">If you are diagnosed with type 2 diabetes, treatment may include lifestyle changes, oral medications, and ongoing <a href=\"https:\/\/herbcure.ir\/en\/type-2-diabetes-treatment\/\">type 2 diabetes treatment<\/a> planning with your healthcare provider.<\/p>\n<\/blockquote>\n<h2>Complications of Undiagnosed Diabetes<\/h2>\n<p>If diabetes remains untreated or undiagnosed, serious complications can occur:<\/p>\n<ul>\n<li>Heart disease<\/li>\n<li>Kidney damage<\/li>\n<li>Diabetic neuropathy<\/li>\n<li>Vision loss<\/li>\n<li>Stroke<\/li>\n<\/ul>\n<h2>When Should You See a Doctor?<\/h2>\n<p>You should consider medical evaluation and diabetes testing if you experience:<\/p>\n<ul>\n<li>Persistent thirst<\/li>\n<li>Frequent urination<\/li>\n<li>Severe fatigue<\/li>\n<li>Sudden weight loss<\/li>\n<li>Blurred vision<\/li>\n<\/ul>\n<h2>Practical Tips for Patients<\/h2>\n<ul>\n<li>Schedule regular blood sugar testing.<\/li>\n<li>Maintain a balanced diet.<\/li>\n<li>Exercise consistently.<\/li>\n<li>Monitor your weight.<\/li>\n<li>Follow medical advice carefully.<\/li>\n<\/ul>\n<h2>Common Mistakes Patients Make<\/h2>\n<ul>\n<li>Ignoring early symptoms<\/li>\n<li>Skipping regular screenings<\/li>\n<li>Self-medicating without medical advice<\/li>\n<li>Neglecting diet and exercise<\/li>\n<\/ul>\n<h2>Frequently Asked Questions<\/h2>\n<h3>Can diabetes exist without symptoms?<\/h3>\n<p>Yes. Many individuals with type 2 diabetes have no obvious symptoms for years and are diagnosed only after routine blood tests.<\/p>\n<h3>What is the best test for diabetes diagnosis?<\/h3>\n<p>The HbA1c test is one of the most accurate and commonly used tests because it reflects average blood sugar levels over several months.<\/p>\n<h3>Can prediabetes be reversed?<\/h3>\n<p>In many cases, yes. Lifestyle changes such as healthy eating, weight loss, and regular exercise can help reverse prediabetes.<\/p>\n<h2>References<\/h2>\n<p>1. Mayo Clinic \u2014 Diabetes<br \/>\n<a href=\"https:\/\/www.mayoclinic.org\/diseases-conditions\/diabetes\">https:\/\/www.mayoclinic.org\/diseases-conditions\/diabetes<\/a><\/p>\n<p>2. World Health Organization \u2014 Diabetes<br \/>\n<a href=\"https:\/\/www.who.int\/news-room\/fact-sheets\/detail\/diabetes\">https:\/\/www.who.int\/news-room\/fact-sheets\/detail\/diabetes<\/a><\/p>\n<p>3. CDC \u2014 Diabetes<br \/>\n<a href=\"https:\/\/www.cdc.gov\/diabetes\">https:\/\/www.cdc.gov\/diabetes<\/a><\/p>\n<p>4. National Institutes of Health \u2014 Diabetes Research<br \/>\n<a href=\"https:\/\/www.nih.gov\">https:\/\/www.nih.gov<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Diabetes diagnosis explained: symptoms, blood sugar tests, HbA1c, and screening methods doctors use to detect diabetes and prediabetes.<\/p>\n","protected":false},"author":1,"featured_media":2884,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[108],"class_list":["post-2045","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-endocrine-system-en","tag-cluster-1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.7.1 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Diabetes Diagnosis: Symptoms, Blood Tests, and How Doctors Detect Diabetes - Avaye Tabiat Pharmaceutical World<\/title>\n<meta name=\"description\" content=\"Diabetes diagnosis explained: symptoms, blood sugar tests, HbA1c, and screening methods doctors use to detect diabetes and prediabetes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/herbcure.ir\/en\/diabetes-diagnosis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Diabetes Diagnosis: Symptoms, Blood Tests, and How Doctors Detect Diabetes\" \/>\n<meta property=\"og:description\" content=\"Diabetes diagnosis explained: symptoms, blood sugar tests, HbA1c, and screening methods doctors use to detect diabetes and prediabetes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/herbcure.ir\/en\/diabetes-diagnosis\/\" \/>\n<meta property=\"og:site_name\" content=\"Avaye Tabiat Pharmaceutical World\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-22T07:32:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-01T10:01:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/herbcure.ir\/wp-content\/uploads\/2025\/09\/diabetes2.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1002\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Ahmad Ghoreishi\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ahmad Ghoreishi\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/herbcure.ir\\\/en\\\/diabetes-diagnosis\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/herbcure.ir\\\/en\\\/diabetes-diagnosis\\\/\"},\"author\":{\"name\":\"Ahmad Ghoreishi\",\"@id\":\"https:\\\/\\\/herbcure.ir\\\/en\\\/#\\\/schema\\\/person\\\/171271ea948e2273c967ce733ea33229\"},\"headline\":\"Diabetes Diagnosis: Symptoms, Blood Tests, and How Doctors Detect Diabetes\",\"datePublished\":\"2025-09-22T07:32:07+00:00\",\"dateModified\":\"2026-06-01T10:01:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/herbcure.ir\\\/en\\\/diabetes-diagnosis\\\/\"},\"wordCount\":1016,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/herbcure.ir\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/herbcure.ir\\\/en\\\/diabetes-diagnosis\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/herbcure.ir\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/diabetes2.webp\",\"keywords\":[\"cluster 1\"],\"articleSection\":[\"Endocrine &amp; 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