Amino-acid metabolism, neurotransmitters, haemoglobin and homocysteine metabolism.
Switzerland age 18–65: 1.6 mg/day women, 1.7 mg/day men.
Fish, poultry, potatoes, chickpeas, bananas and fortified foods.
Anaemia, inflamed skin/tongue, impaired immunity, irritability or confusion can occur.
Deficiency is more likely with malabsorption, kidney disease, alcohol dependence or certain medicines.
Dermatitis and mouth/tongue changes are possible but nonspecific.
Malabsorption, dialysis/kidney disease, alcohol dependence and some medicines.
Assess symptoms, medicines, diet and, when appropriate, PLP laboratory testing together.
Use only when targeted; B6 is often hidden at high doses in combination products.
Chronic high supplemental doses can cause potentially irreversible sensory neuropathy.