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Iodine, Evolution and the Thyroid

with Matthew Wood and Phyllis D. Light

Herbalist with 75 Years of Joint Experience 

as Consulting Herbalists & Herbal Authors

Iodine was the first antiseptic and anti-inflammatory substance—absorbed by primitive creatures from the sea around them. 

The thyroid was developed by higher animals, not to regulate heat, but to continue to supply these functions. 

Finally, warm-blooded animals developed thyroid hormones (T4 and T3), the function of which was to regulate heat production in cells. 

Finally, humans discovered iodine and it was recognized as essential to human health—to prevent hypothyroidism, goiter, and use as an antiseptic and antibacterial. 

Many organs other than the thyroid require iodine, particularly the breasts—breast cysts and diseases can be caused by a lack—and the brain, which is protected from some kinds of stroke by iodine released into the carotid sinus. We see the importance of iodine in a wide arena in the body. 

This class will answer:

• Iodine, when do we need it?  

• How do we take it?

• What are the different forms of iodine? 

• What problems arise when related elements such as bromine substitute for iodine in the body? 

* Phyllis will answer the question: is there iodine in Calendula?

Who is this class for?

This is an Intermediate-level class. Students of all levels are welcome.

This class is for anyone--not just herbalists--interested in iodine, evolution, the thyroid and the naturally existing support and remedies for thyroid and related health conditions.


  • Online Materials

    View over 100 pages of manuscripts by Matthew Wood and Phyllis D. Light. See Curriculum below.

  • 1 year access to materials and Q&A during and after class

    1 year to view and review content, ask questions and discuss with fellow students and teachers.

  • 2 hours of teaching

    2 hours of in-depth teaching with Matthew Wood and Phyllis D. Light


Sunday, October 24th

2:00 - 4:00 pm US Central (Chicago time)

easy time zone converter here


We use the online webinar service, Zoom

Webinar links are sent to enrolled students 2 days, 1 day and 1 hour prior to class. See the simple instruction on how to attend on our HELP page.

The recording of the class will be available within 2 days of the webinar.

What is the class like?

Classes are held online in a webinar format. Students will view and hear only the teachers and hosts and can participate in the online chat and Q&A.


  • 1


    • Welcome Message

  • 2

    Support Materials

    • About "view only" documents

    • Iodine by Mattthew Wood, 101 pages

    • Patterns of Hormonal and Reproductive Imbalance by Matthew Wood and Phyllis D. Light (version 9.1.21) 21 pages

  • 3

    Iodine and Thyroid

    • Webinar Instructions

    • The class recording will be here within 2 days of the online class.

Documents are not downlodable. Please note that Matthew often adds manuscripts of up-coming books and is allowing students early access to these works-in-progress and therefor they are available as "view-only" documents and are not downloadable.

Get the Early-bird price!

1-year access

Start at anytime! Complete the lessons at your own pace. 

Certificates designed and signed by Matthew Wood are available for purchase to those who successfully complete all tests with a passing grade of 70% or better. More details regarding certificates are here.

The test is approximately 20 multiple choice questions. Multiple attempts are permitted.

This class will be added to the Library approximately June 2022.

Free Preview Material

"Patterns of Hormonal and Reproductive Imbalance" 

by Matthew Wood and Phyllis D. Light

Access this 21 page document for FREE and receive news of upcoming classes in this SERIES of classes HERE!