What we refer to as Vitamin K is an important group of chemicals which help our blood to clot. There are several different types of Vitamin K and these different types all have different effects on the body. The only effect that is being considered when Vitamin K is offered to your baby is its role in reducing the chance of complications from excessive bleeding known as Vitamin K Deficiency Bleeding (VKDB). VKDB was previously known as Haemorrhagic Disease of the Newborn (HDN) and the two names refer to the same condition. VKDB is very rare but it can be very serious, which is why the parents of all babies in the UK are offered an injection of Vitamin K for their baby, just after birth, even though almost all of those babies will not benefit from it. If parents decline the injection they should be offered an oral dose given several times over a few weeks.