Dr. Berg’s Healthy Keto and Intermittent Fasting Podcast

The 3 Vitamins That WORSEN Nerve Pain (A Nerve Poison?)

Mar 19, 2026
They dig into how common B vitamins can actually worsen peripheral nerve pain when not converted to their active forms. Topics include why B6 and B12 conversions fail, how sluggish liver, low bile, inflammation, or high blood sugar block activation, and why fat‑soluble benfotiamine and alpha‑lipoic acid may reach nerves better. Practical tips on forms, dosing limits, and supporting digestion and insulin are also covered.
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INSIGHT

How Unconverted B6 Becomes Neurotoxic

  • Vitamin B6 must be converted in the liver to P5P to function in neurotransmitter synthesis.
  • If liver detox, bile, glutathione, magnesium, or methylation are impaired, unmetabolized B6 accumulates and can damage nerves.
INSIGHT

Why Common B12 Supplements May Be Useless

  • Most supplements use cyanocobalamin which requires methylation to convert to active methylcobalamin for myelin repair.
  • Genetic methylation defects, gut inflammation, low stomach acid, or low microbes block conversion and cause neuropathic symptoms.
INSIGHT

B1 Is Crucial For Nerve Energy And Myelin

  • Vitamin B1 is essential for neuronal mitochondria and myelin; deficiency impairs energy and leads to nerve death in long peripheral nerves.
  • Diabetics commonly deplete B1, causing peripheral neuropathy in feet and toes.
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