黑料福利社

One of the most important medicines for your newborn is the vitamin K shot given shortly after birth. It helps prevent serious bleeding problems in babies.

Vitamin K activates clotting factors that control bleeding. Humans get most of their vitamin K from plants, with a small amount made by bacteria in the intestines.

Newborns start life with very low levels. Vitamin K does not cross the placenta easily, and babies do not yet have enough gut bacteria to produce it on their own. Breast milk, while the best nutrition overall, contains very little vitamin K. Infant formula, however, contains higher levels.

This deficiency puts babies at risk of a condition called vitamin K deficiency bleeding (VKDB). There are three types: early, classic and late.

Early VKDB occurs within the first 24 hours of life. Classic VKDB appears between days 2 and 7. Late VKDB can occur anytime up to 6 months of age.

Signs of bleeding in infants may include paleness, bruising or bloody or tarry stools.

In the most severe cases, bleeding can occur in the brain. This is most common with late VKDB and can happen without warning. In about half of these cases, a brain bleed is the first sign something is wrong.

Affected babies may become lethargic or irritable, develop a bulging soft spot, or have seizures. Even with treatment, outcomes can be devastating. About 20% of infants with brain bleeds from VKDB die, and many survivors have permanent brain damage.

Fortunately, VKDB is rare because of prevention. A single 1 mg vitamin K injection given within the first six hours after birth is highly effective.

The vitamin K is stored in the liver and released slowly over several months, reducing the risk of bleeding to nearly zero.

Side effects are minimal and similar to any injection: brief discomfort, mild swelling or slight bruising. Holding your baby during the shot can help ease distress.

Some parents ask about oral vitamin K instead of the injection. However, oral dosing鈥攚hether single or repeated鈥攄oes not work as well. Absorption can vary, and it does not provide the same long-lasting protection.

Ensuring your baby receives the vitamin K shot shortly after birth is a simple, safe, and highly effective way to prevent dangerous bleeding that can occur without warning.