Nutrient

Vitamin B6

Established research area

A B vitamin involved in protein metabolism and in forming neurotransmitters. Found in fish, poultry, bananas, chickpeas, and potatoes.

Commonly noted

Commonly noted: Vitamin B6 is used by the body in protein metabolism and in making neurotransmitters and hemoglobin.
Low intake: A vitamin B6 shortfall is uncommon and is commonly discussed in relation to skin changes, a sore tongue, and low mood.
Higher intake: Very high vitamin B6 from supplements over a long time is commonly discussed in relation to nerve symptoms such as tingling in the hands and feet; the commonly cited upper intake level for adults is 100 mg a day.

Source: NIH ODS

General reference figures for a typical adult, not a personal target.