The Central Vitamin B6 Axis
INPUT
Dietary Vitamin B6
ACTIVATION
Conversion to the Active Form (PLP)
EFFECT
Essential for Neurotransmitters & Metabolism
The Key Players in the System
Essential Co-Factors
Zn Zinc
Mg Magnesium
Mn Manganese
Important Influencing Factors
🧬 Genetics (e.g., HLA-DQ2/8)
🦠 Microbiome & Gut Health
🧠 Chronic Stress
Diagnostic Patterns: Understanding Lab Values
Low PLP / Low Total B6
→ Intake Deficiency
Low PLP / High Total B6
→ Conversion Disorder
High PLP / High Total B6
→ Possible Oversupplementation
Typical Deficiency Symptoms of B Vitamins
B1 (Thiamine)
- Neurological disorders
 - Memory loss, confusion
 - Muscle weakness, cramps
 - Cardiovascular problems
 - Loss of appetite & weight loss
 - Irritability, depression
 - Numbness in limbs
 - Fatigue, exhaustion
 - Poor concentration
 - Digestive problems
 
B2 (Riboflavin)
- Cracked corners of the mouth
 - Sore, red tongue
 - Skin rashes, dermatitis
 - Light sensitivity, burning eyes
 - Sore throat
 - Anemia
 - Fatigue, weakness
 - Hair loss
 - Growth problems
 - Nerve damage
 
B3 (Niacin)
- Skin inflammation (pellagra)
 - Diarrhea, digestive issues
 - Dementia, confusion
 - Depression, apathy
 - Headaches, dizziness
 - Insomnia
 - Muscle weakness
 - Loss of appetite
 - Irritability
 - Memory problems
 
B6 (Pyridoxine)
- Skin rashes, acne
 - Anemia (microcytic)
 - Depression, anxiety
 - Confusion, irritability
 - Weakened immune system
 - Numbness in hands and feet
 - Cracked lips and tongue
 - Seizures, muscle twitching
 - Fatigue
 - Premenstrual syndrome (PMS)
 
B12 (Cobalamin)
- Megaloblastic anemia
 - Extreme fatigue, weakness
 - Nerve damage (tingling, numbness)
 - Difficulty walking, balance problems
 - Memory problems, dementia
 - Depression, behavioral changes
 - Sore tongue, mouth ulcers
 - Vision problems
 - Shortness of breath, heart palpitations
 - Pale or jaundiced skin
 
The Prioritized Treatment Path
Replenish Co-Factors
First, correct Zinc, Manganese & Magnesium.
Choose the Right B6 Form
Based on the lab pattern (PLP or PN-HCl).
Support Gut Health
Stabilize gut barrier and microbiome.