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<section
class="usa-banner"
aria-label="Official website of the United States government"
>
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<div class="grid-col-auto">
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aria-hidden="true"
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<p class="usa-banner__header-text">
An official website of the United States government
</p>
<p class="usa-banner__header-action">Here’s how you know</p>
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type="button"
class="usa-accordion__button usa-banner__button"
aria-expanded="false"
aria-controls="gov-banner-default-default"
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class="usa-banner__content usa-accordion__content"
id="gov-banner-default-default"
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<div class="grid-row grid-gap-lg">
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<img
class="usa-banner__icon usa-media-block__img"
src="https://medlineplus.gov/uswds/img/icon-dot-gov.svg"
role="img"
alt=""
aria-hidden="true"
/>
<div class="usa-media-block__body">
<p>
<strong>Official websites use .gov</strong><br />A
<strong>.gov</strong> website belongs to an official government
organization in the United States.
</p>
</div>
</div>
<div class="usa-banner__guidance tablet:grid-col-6">
<img
class="usa-banner__icon usa-media-block__img"
src="https://medlineplus.gov/uswds/img/icon-https.svg"
role="img"
alt=""
aria-hidden="true"
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<div class="usa-media-block__body">
<p>
<strong>Secure .gov websites use HTTPS</strong><br />A
<strong>lock</strong> (
<span class="icon-lock"
><svg
xmlns="http://www.w3.org/2000/svg"
width="52"
height="64"
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focusable="false"
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<title id="banner-lock-title-default">Lock</title>
<desc id="banner-lock-description-default">Locked padlock icon</desc>
<path
fill="#000000"
fill-rule="evenodd"
d="M26 0c10.493 0 19 8.507 19 19v9h3a4 4 0 0 1 4 4v28a4 4 0 0 1-4 4H4a4 4 0 0 1-4-4V32a4 4 0 0 1 4-4h3v-9C7 8.507 15.507 0 26 0zm0 8c-5.979 0-10.843 4.77-10.996 10.712L15 19v9h22v-9c0-6.075-4.925-11-11-11z"
/>
</svg> </span
>) or <strong>https://</strong> means you’ve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
</p>
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</section>
<div id="mplus-wrap">
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<a href="http://www.nih.gov/" class="nih-org" target="_blank" title="National Institutes of Health">
<img class="nihlogo" src="https://medlineplus.gov/images/nihlogo.png" alt="National Institutes of Health"/>
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<div>
<span>Information Quality&mdash;Part 2 of 4</span>
</div>
</div>
</div>
<span class="page-url print-only">URL of this page: https://medlineplus.gov/webeval/infoquality2.html</span>
<!-- begin content -->
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<article>
<!-- Begin Web Evaluation Tutorial Navigation -->
<div class="resrow">
<h1 align="center">Evaluating Internet Health Information Tutorial</h1>
<div class="webeval-nav-mid">
<ul class="webeval_nav">
<li><a class="webeval_nav_regular" href="https://medlineplus.gov/webeval/intro1.html">Introduction</a></li>
<li><a class="webeval_nav_regular" href="https://medlineplus.gov/webeval/provider1.html">Provider and Purpose</a></li>
<li><a class="webeval_nav_active" href="https://medlineplus.gov/webeval/infoquality1.html">Information Quality</a></li>
<li><a class="webeval_nav_regular" href="https://medlineplus.gov/webeval/privacy1.html">Privacy</a></li>
<li><a class="webeval_nav_regular" href="https://medlineplus.gov/webeval/conclusion1.html">Conclusion</a></li>
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<div class="full-half">
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<h1>Information Quality&mdash;Part 2 of 4</h1>
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<div class="webeval-mt">
<p>You learned from earlier clues that a drug company sponsors the Institute's website. It's possible that this company writes information for the website in order to promote itself and the products it sells. If this is the case, the information provided is biased and could be misleading.</p>
<p>Even if experts review the information that is posted on a site, you should continue to ask questions.</p>
<p>Look to see if the site clearly tells you where the information came from. Good sites should rely on medical research, not opinions. So, check to see if they give you the source of any research they mention.</p>
<p>It should also be clear who wrote the content.</p>
<figure class="recog-img">
<img alt="Screenshot of the 'About this Site' page for the IHH. A red box outlines the text '...the support of HeartDrugz, a company that produces high-quality vitamins and medication.'" src="https://medlineplus.gov/images/webevalihhabout03.jpg">
<figcaption class="webeval_figcaption"><strong>This example says the site is getting support from a drug company, showing why reviewing the site information is important.</strong></figcaption>
</figure>
<br /><br />
<p>Let's compare what these websites tell you about where they get their content.</p>
</div>
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<div class="full-half">
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<span id="lastupdate">Last updated October 3, 2023</span>
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