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We welcome your questions and feedback and will use them to improve the website and add new material.

For questions about the IF Ratings and how they are used, please see the Using the IF Ratings page. Also,  check the Frequently Asked Questions page, which is updated regularly with new information.

If you have a question regarding your own health, please consult a qualified health professional who can advise you based on a thorough understanding of your unique situation. We regret that we cannot provide individual medical advice.

For other inquiries, media requests, or to submit a product for rating, please contact us using the the following form. If you would like to receive research and product updates, please check the “keep me posted” box.

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