- One of the B group of vitamins found in green leaves (hence the name) and other foods. Essential for health and especially to prevent foetuses developing neural cord defects (e.g. spina bifida) and cleft palates during pregnancy. Deficiency can cause a form of anaemia (megaloblastic anaemia) but excess can mask the signs of pernicious anaemia caused by vitamin B12 deficiency.
- noun a vitamin in the Vitamin B complex found in milk, liver, yeast and green vegetables such as spinach, which is essential for creating new blood cells