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Vitamin B12 is considered an essential nutrient and vital for cell division, the synthesis of red blood cells, and the functioning of the nervous system. It is also a necessary and vital nutrient for the process of methylation.

Without intrinsic factor, produced in the stomach, we can’t absorb or utilize vitamin B12. A deficiency of vitamin B12 can affect every system of the body and give rise to anemia, lack of energy, and poor memory and concentration.

Join Phyllis as she discusses the ins and outs of vitamin B12, its role in methylation, and foods, herbs, and supplements that may be useful in restoring or utilizing this vital nutrient.


  • Support Materials

    Online Materials by Phyllis D. Light (downloadable) and Matthew Wood (early preview of a manuscript by Matthew, view-only)

  • 1 year access to materials and Q&A

    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

Course curriculum

  1. 1
    • Welcome Message

  2. 2
    • Vitamin B12, Intrinsic Factor, and Methylation - Matthew Wood (21 pages, not downloadable)

    • Vitamin B12 - Phyllis D. Light (14 pages, downloadable)

  3. 3
    • B12, Intrinsic Factor and Methylation - Webinar Chat Text

    • B12, Intrinsic Factor and Methylation - Video

    • B12, Intrinsic Factor and Methylation - Audio

  4. 4
    • Test and Certificates

    • B12, Intrinsic Factor, and Methylation Test

  5. 5
    • Please share your thoughts



Documents are not downloadable. Please note that Matthew often adds manuscripts of upcoming books and is allowing students early access to these works-in-progress; therefore, they are available as 'view-only' documents and are not downloadable.

Single class purchase

1-year access to this class

The Library Bundle

Access to this class and many more.
(Full list can be found on The Library page.)

Start at any time! 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 herbal course certificates are here.

Tests are multiple-choice, and multiple attempts are permitted.

For those of you seeking clinical hours, we have a list of all classes/courses with corresponding accreditation hours.