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Free eBook

Discover the hidden key to laser focus, foolproof memory, and a crystal-clear mind

Learn how optimizing vitamin B12 levels can banish brain fog, boost mental clarity, and support brain health—at any age.

Have you ever had a “senior moment”—even if you’re not yet a senior? We’ve accepted that a significant decline in our cognitive abilities is just part of getting older, when in many cases it may be something as simple as not getting enough of a simple, yet critical, nutrient: vitamin B12.

In this free eBook, you’ll learn:

  • The early signs that you’re not getting enough B12

  • The potentially devastating effects of B12 deficiency

  • Why B12 deficiency is often missed or misdiagnosed

  • Myths and truths about sources of B12 in the diet

  • How to test your B12 levels

  • How (and why) to supplement with B12

This eBook will give you the information and tools you need to optimize your B12 levels, supercharge your cognitive health, and protect against conditions associated with B12 deficiency.

Meet the author

Chris Kresser M.S., L.Ac.

Chris is one of the most respected clinicians and educators in the fields of Functional Medicine and ancestral health. He has treated hundreds of patients over his 15-year career, and has trained over 2,000 clinicians and health coaches from over 50 countries in his unique approach. Chris was named one of the 100 most influential people in health and fitness by Greatist.com and has appeared as a featured guest on Dr. Oz, Time, The Atlantic, NPR, Fox & Friends, and other national media outlets.

Chris is also the:
  • New York Times best-selling author of The Paleo Cure and Unconventional Medicine
  • Co-founder of the California Center for Functional Medicine
  • Founder of the Kresser Institute
  • Creator ChrisKresser.com, an award-winning health website
  • Creator of Revolution Health Radio, a top-ranked health podcast








B12 deficiency is a silent epidemic that is routinely missed and under-diagnosed

B12 deficiency isn’t a bizarre, mysterious disease. It’s written about in every medical textbook, and its causes and effects are well-established in the scientific literature.

But did you know that even low-normal levels of B12 can have serious consequences and that sub-optimal intake of B12 is far more common than most people realize? Studies have shown that:

  • 40% of adults have B12 levels in the “low-normal” range

  • Low-normal B12 levels can cause neurological problems (some of which can be irreversible)

  • Although B12 deficiency is more common as we age, many young people also suffer from low B12

  • Many symptoms we attribute to “aging” may be caused (and corrected) by B12 deficiency

Get the free eBook

This eBook will give you the information and tools you need to optimize your B12 levels, supercharge your cognitive health, and protect against conditions associated with B12 deficiency.

© 2022 Chris Kresser. All rights reserved.

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