This is a plain paragraph. If everything below renders correctly, the editor supports Markdown.

## This Should Be A Heading

If this line appears large and bold, headings work. If you can see the two hash symbols, they do not.

**This text should be bold.** If you can see the asterisks, bold does not work.

### This Should Be A Smaller Heading

Now testing an internal link. [This should be a clickable link to the biological age calculator](/tools/biological-age)

If that appears as blue or underlined text you can click, links work. If you see the square brackets and the URL in plain text, they do not.

- This should be a bullet point - This should be a second bullet - This should be a third

Testing HTML as a fallback:

<h2>This is an HTML heading</h2>

<p>This is an HTML paragraph with a <a href="/tools/protein-calculator">link to the protein calculator</a>.</p>

<strong>This is HTML bold text.</strong>

End of test.