Vitamin B6 is one of the B vitamins which is an essential nutrient for humans.
Vitamin B-6 (pyridoxine) is important for normal brain development and for keeping the nervous system and immune system healthy.
Most people are able to get vitamin B6 largely from animal products, including meat, dairy and eggs.
The vitamin is also available in a range of different plant foods, including spinach, kale, bananas and potatoes, so deficiency is rare, even for vegetarians and vegans.
Despite being readily available in the diet, vitamin B6 is also widely included in various supplements
When excessive vitamin B6 accumulates in the blood it can cause a condition called peripheral neuropathy.
The most common symptoms are numbness and tingling, though in some cases patients may experience difficulty with balance or walking
vitamin B6 poisoning can injure nerves and lead to symptoms including numbness, tingling and even trouble walking and moving.