Blood Cholesterol - What is Blood Cholesterol?

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field--name-field-hide-social-media-icons field--type-boolean field--label-hidden field__item">0</div> </div> </div> </div> <div class="layout layout--twocol-section layout--twocol-section--25-75"> <div class="layout__region layout__region--first"> <div class="block block-nhlbi-health-topics block-nhlbi-book-navigation component-health-topics-menu"> <div class="view-health-topics-menu view-id-health_topics_menu view-display-id-block_1 component-health-topics-red"> <div class="view-header nav-heading"> <div class="nav-header-inner"> <a href="" hreflang="en">Blood Cholesterol</a> </div> <div class="nav-button-wrapper"> <a class="button nav-button" id="component-submenu-toggle" href="javascript:void(0);"> <span class="subnav-inner-text">MENU</span></a> </div> </div> <div class="block block-nhlbi-utils block-nhlbi-global-breadcrumb"> <div class="responsive-container responsive-container-constrained breadcrumbs-container"><div class="breadcrumbs"><ul> <li class='breadcrumb-home-single'><a href='/'><span class='back-to'> < Back To </span> Home</a></li><li class='breacrumb-break'><i class="fas fa-angle-right"></i></li><li class='breadcrumb-current'>Blood Cholesterol</li></ul></div></div> </div> <div class="view-content"> <div class="subnav-menu-wrapper responsive-container responsive-container-constrained component-health-topics-red"> <ul class="subnav-menu"> <li class="nav-active-trail nav-active section-menu-item subnav-link"> <a href="/health/blood-cholesterol" aria-label="What is Blood Cholesterol?-Blood Cholesterol" hreflang="en">What is Blood Cholesterol?</a> </li> <li class="section-menu-item subnav-link"> <a href="/health/blood-cholesterol/symptoms" aria-label="Symptoms-Blood Cholesterol" hreflang="en">Symptoms</a> </li> <li class="section-menu-item subnav-link"> <a href="/health/blood-cholesterol/diagnosis" aria-label="Diagnosis-Blood Cholesterol" hreflang="en">Diagnosis</a> </li> <li class="section-menu-item subnav-link"> <a href="/health/blood-cholesterol/causes" aria-label="Causes and Risk Factors -Blood Cholesterol" hreflang="en">Causes and Risk Factors </a> </li> <li class="section-menu-item subnav-link"> <a href="/health/blood-cholesterol/treatment" aria-label="Treatment-Blood Cholesterol" hreflang="en">Treatment</a> </li> <li class="section-menu-item subnav-link"> <a href="/health/blood-cholesterol/living-with" aria-label="Living With High Cholesterol-Blood Cholesterol" hreflang="en">Living With High Cholesterol</a> </li> </ul> </div> </div> </div> </div> <div class="block block-nhlbi-health-topics block-nhlbi-health-topics-more-info"> <div class="field field--name-field-component-more-information field--type-entity-reference-revisions field--label-hidden field__item"> <div class="paragraph paragraph--type--component-more-information paragraph--view-mode--default responsive-container responsive-container-constrained component-more-information component-more-information-theme-red"> <div class="health-topics-more-information"> <p>MORE INFORMATION</p> <div class="clinical-trials-info-link"> <i class="fas fa-notes-medical"></i> <a href="/research/clinical-trials?f%5B0%5D=disease_or_condition_name%3ABlood%20Cholesterol"> Participate in a Study </a> </div> <div class="publications-info-link"> <i class="fas fa-book-open"></i> <a href="/resources?f%5B0%5D=related_health_topics%3ABlood%20Cholesterol"> Fact Sheets and Handouts </a> </div> </div> </div> </div> </div> </div> <div class="layout__region layout__region--second"> <div class="field field--name-field-health-topic node-theme-red field__item block block-nhlbi-health-topics block-nhlbi-health-topics-book-name"> <div>Blood Cholesterol</div> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicstitle"> <h1 class="field field--name-title field--type-string field--label-hidden responsive-container responsive-container-constrained field__item"><span class="ht-kicker">Blood Cholesterol </span>What is Blood Cholesterol?<hr> </h1> </div> <div class="block block-addtoany block-addtoany-block"> <div class="responsive-container responsive-container-constrained"> <span class="a2a_kit a2a_kit_size_24 addtoany_list" data-a2a-url="https://www.nhlbi.nih.gov/health/blood-cholesterol" data-a2a-title="What is Blood Cholesterol?"> <a class="a2a_dd addtoany_share" href="https://www.addtoany.com/share#url=https%3A%2F%2Fwww.nhlbi.nih.gov%2Fhealth%2Fblood-cholesterol&title=What%20is%20Blood%20Cholesterol%3F" title="Share"> <img src="/themes/custom/nhlbi/images/share-alt-icon.svg" alt="Share"> </a> <a class="a2a_button_email" title="Email"></a> <a class="a2a_button_print" title="Print"></a> </span> </div> </div> <div class="language-switcher-language-url block block-language block-language-blocklanguage-content" role="navigation"> <div class="responsive-container responsive-container-constrained"><h2 class="visually-hidden" aria-label="Switch to Espanol">Language switcher</h2><ul class="links"><li hreflang="en" data-drupal-link-system-path="node/92752" class="is-active" aria-current="page"><a href="/health/blood-cholesterol" class="language-link is-active" hreflang="en" data-drupal-link-system-path="node/92752" aria-current="page">English</a></li><li hreflang="es" data-drupal-link-system-path="node/92752"><a href="/es/salud/colesterol-en-sangre" class="language-link" hreflang="es" data-drupal-link-system-path="node/92752">Español</a></li></ul> </div> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-component-page-links"> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-component-sections"> <div class="field field--name-field-component-sections field--type-entity-reference-revisions field--label-hidden"> <div class='field__items'> <div class="paragraph component component-section component-theme-white component-section-theme-white component-section-node-theme- paragraph--type--component-section paragraph--view-mode--default"> <div class="responsive-container responsive-container-constrained"> <div class="field field--name-field-component-section-content field--type-text-long field--label-hidden clearfix field__item"> <figure class="align-right b-loaded caption caption-img "> <div class="embed-video-container embed-video-text-container-disabled align-"> <div class="field field--name-field-video-url field--type-video-embed-field field--label-hidden field__item"><div class="video-embed-field-provider-youtube video-embed-field-responsive-video"><iframe width="854" height="480" frameborder="0" allowfullscreen="allowfullscreen" title="Learn About Blood Cholesterol" src="https://www.youtube.com/embed/cqmCVSBfAfo?autoplay=0&start=0&rel=0&enablejsapi=1"></iframe> </div> </div> </div> <figcaption><em>Watch this video to see how cholesterol flowing through your bloodstream can build up on the wall of the blood vessel over time. This forms plaque that can partially block blood flow through the blood vessel. </em><a href="http://www.nucleuscatalog.com/" rel="noreferrer"><em>Medical Animation Copyright © 2025 Nucleus Medical Media, All rights reserved.</em></a> <a href="https://www.youtube.com/watch?v=Ssd0gueV0i8" rel="noreferrer"><em>Click here to view this video with an audio description</em></a><em>.</em></figcaption> </figure> <p>Cholesterol is a waxy, fat-like substance that your body needs for good health, but in the right amounts.</p><p> <span data-entity-type="node" data-entity-uuid="d24dad46-e456-42ac-89ac-13e2bb11d8ef" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"firstLetter","data-glossary-plural":"plural","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of Lipoprotein " alt="Definition of Lipoprotein" data-term="Lipoprotein" data-pronunciation="LY-poh-PRO-teen" data-definition="A complex molecule containing protein and lipids. Cholesterols such as high-density lipoproteins (HDLs) and low-density lipoproteins (LDLs) are types of lipoproteins." role="link"> Lipoproteins <i class="fa-solid fa-circle-info"></i></a> </span>  are small, round particles made of  <span data-entity-type="node" data-entity-uuid="30783371-e830-47c0-8a9b-b9e3df173662" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"none","data-glossary-plural":"plural","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of lipid " alt="Definition of lipid" data-term="lipid" data-pronunciation="LIH-pid" data-definition="Another word for fat, a type of nutrient that the body needs in small amounts. Lipids include saturated fats, unsaturated fats, and trans fats." role="link"> lipids <i class="fa-solid fa-circle-info"></i></a> </span>  (fats) and  <span data-entity-type="node" data-entity-uuid="009f8382-f888-4ea8-aff5-afdef6f0b6c1" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"none","data-glossary-plural":"plural","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of protein " alt="Definition of protein" data-term="protein" data-pronunciation="PRO-teen" data-definition="Large molecule made up of building blocks called amino acids. Proteins make up the structure of a cell. Proteins are involved in structures, hormones, enzymes, muscle contraction, immune system responses, and other essential life functions. The amino acids involved are generally determined by a gene." role="link"> proteins <i class="fa-solid fa-circle-info"></i></a> </span> . These particles carry cholesterol in your blood and throughout your body. Two types of lipoproteins include:</p><ul><li><strong>Low-density lipoprotein (LDL),</strong> sometimes called “bad” cholesterol</li><li><strong>High-density lipoprotein (HDL),</strong> sometimes called “good” cholesterol</li></ul></div> </div> </div> <div class="paragraph component component-section component-theme-white component-section-theme-white component-section-node-theme- paragraph--type--component-section paragraph--view-mode--default"> <div class="responsive-container responsive-container-constrained"> <div class="field field--name-field-component-section-content field--type-text-long field--label-hidden clearfix field__item"><p>High levels of “bad” LDL cholesterol may create a buildup of  <span data-entity-type="node" data-entity-uuid="4ce59017-5715-472f-bb7a-02168d3ef677" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"lowercase","data-glossary-plural":"none","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of plaque " alt="Definition of plaque" data-term="plaque" data-pronunciation="Plak" data-definition="A substance made up of fat, cholesterol, calcium, and other substances found in the blood. In some cardiovascular diseases, plaque builds up and hardens in arteries. Plaque buildup reduces blood flow and makes it more likely that blood clots will form in the arteries. These blood clots can partially or completely block blood flow and oxygen delivery to the heart, brain, kidneys, or legs, arms, or pelvis." role="link"> plaque <i class="fa-solid fa-circle-info"></i></a> </span>  (fatty deposits) in your  <span data-entity-type="node" data-entity-uuid="91c34abb-245a-4c53-96ab-3eac8929b0c2" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"none","data-glossary-plural":"plural","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of artery " alt="Definition of artery" data-term="artery" data-pronunciation="ARR-tuh-ree" data-definition="A blood vessel that carries blood from the heart to the organs. Most arteries carry oxygenated blood. The pulmonary arteries carry deoxygenated blood away from the heart to the lungs. " role="link"> arteries <i class="fa-solid fa-circle-info"></i></a> </span> . This buildup can lead to a heart attack, stroke, or other health problems. High levels of “good” HDL cholesterol may lower your risk for health problems. HDL cholesterol carries cholesterol and plaque to the liver to be flushed out of the body.</p> <figure class="align-right b-loaded caption caption-img "> <img alt="A smiling older woman and man preparing salad in a kitchen" data-entity-type="file" data-entity-uuid="e5703c23-7ebd-4bd5-85ee-72519d3eef11" data-image-style height="600" width="900" data-src="/sites/default/files/inline-images/BloodCholesterol_1241736799_03142022.jpg" src="/modules/custom/nhlbi_blazy/images/clear.png" class="b-lazy"> <figcaption><em>Healthy eating patterns can improve cholesterol numbers and reduce disease risk.</em></figcaption> </figure> <p>The  <span data-entity-type="node" data-entity-uuid="3c4ce4aa-1e17-470f-9373-16716a87b874" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"none","data-glossary-plural":"plural","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of gene " alt="Definition of gene" data-term="gene" data-pronunciation="jeen" data-definition="The unit that passes heredity from parents to children. Genes are pieces of DNA and contain information for making a specific protein." role="link"> genes <i class="fa-solid fa-circle-info"></i></a> </span>  you  <span data-entity-type="node" data-entity-uuid="be4aa32a-208b-458a-910f-00bfaad18329" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"none","data-glossary-plural":"none","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of inherit " alt="Definition of inherit" data-term="inherit" data-pronunciation="in-HAYR-iht" data-definition="To pass genetic information from a parent to a child through genes." role="link"> inherit <i class="fa-solid fa-circle-info"></i></a> </span>  and your lifestyle habits play a major role in your cholesterol levels.</p><p>Routine blood tests can show whether your cholesterol levels are healthy or unhealthy. To help get your cholesterol levels into the healthy range, you may need heart-healthy <a href="/health/heart-healthy-living">lifestyle changes or medicines</a>.</p></div> </div> </div> </div> </div> </div> <div class="block block-nhlbi-health-topics block-nhlbi-book-nav-block"> <nav id="book-navigation-92305" class="book-navigation responsive-container-constrained" role="navigation" aria-labelledby="book-label-92305"> <h3 class="visually-hidden" id="book-label-92305">Book traversal links for What is Blood Cholesterol?</h3> <ul class="book-pager"> <li class="book-pager__item book-pager__item--next"> <h4 class="nav-label">Next</h4> <a href="/health/blood-cholesterol/symptoms" rel="next" title="Go to next page">Symptoms <i class="fas fa-angle-right"></i></a> </li> </ul> </nav> </div> </div> </div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-last-updated"> <div class="field field--name-field-last-updated field--type-datetime field--label-hidden responsive-container responsive-container-constrained field__item">Last updated on <time datetime="2024-04-17T12:00:00Z" class="datetime"><span>April 17, 2024</span></time> </div> </div> </div> </div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="block block-layout-builder block-extra-field-blocknodehealth-topicslinks"> </div> </div> </div> </div> </article> </div> </div> </div> </main> <footer role="contentinfo"> <div class="region region-footer"> <div id="block-footerblock" class="block block-block-content block-block-contente34e68d7-0b62-4cbe-ada1-9e43b89bc1ac"> <div class="responsive-container responsive-container-constrained layout layout--onecol"> <div class="layout__region layout__region--content"> <nav role="navigation" aria-labelledby="back-to-top-link-menu" class="block block-menu navigation menu--back-to-top-link"> <div 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