Contact the b12guide.com editorial team

You can reach the editorial team by email at [email protected]. Use this one address for all of the following:

• Corrections: a factual error, an outdated number, or a broken link. Please flag anything that looks wrong, because a wrong number on a health page can mislead readers.
• General questions: about a source we cite, how a page was checked, or how the site works.
• Partnerships: affiliate or business inquiries. Partners have no say in what we write; our editorial policy explains why.

Reporting an error

Please include:

1. The link to the page
2. What you think is wrong
3. A source that supports the correction

Response time

We aim to reply within 5 business days. We read every message, but we cannot promise to answer each one individually.

What we cannot help with

We cannot give personal medical advice, make a diagnosis, or tell you whether your own lab value is normal. Please ask your doctor, pharmacist, or a registered dietitian, who can look at your full history. In an emergency, call 911. See our medical disclaimer.