B12 deficiency: a silent epidemic with serious consequences

Symptoms of B12 deficiency include:vitamin-B1

  • Alzheimer’s, dementia, other memory loss
  • MS and neurological disorders
  • mental illness (depression, anxiety, bipolar)
  • heart disease
  • learning disorders in children
  • autism spectrum
  • autoimmune disease
  • cancer
  • infertility


B12 deficiency is quite common, more so than physicians and the public realize. “Normal” aging signs may be caused by B12 deficiency. It is not something normally tested for in routine blood tests. Levels that are “normal” in the U.S. are actually on the lower limit for deficiency. Vitamin B12 protects nerves and produces the insulation for the nervous system. B12 deficiency causes fatigue, weakness, memory loss, and psychiatric problems. Those with the greatest risk for B12 deficiency include vegetarians, age 60+, women with infertility, people with Crohn’s disease, and those using acid suppressing drugs. B12 is only found in animal products, the one vitamin we can’t get from plants. B12 injections are an easy and affordable treatment. Smaller doses can be taken by mouth or nasal spray.

Kresser, Chris. “B12 deficiency: a silent epidemic with serious consequences.” Chris Kresser: Health for the 21st Century. Chris Kresser, 6 May 2011.

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