Side effects of excess vitamin K include enlarged liver, pale skin, increased sweating, shortness of breath, muscle stiffness, edema, irregular breathing, decreased movement or activity, swollen eyelids, or red skin. In infants and newborns, vitamin K plays an important role in preventing and controlling bleeding, especially bleeding in the brain and meninges. At the same time, it can combine with calcium to help strengthen bones. However, excess vitamin K can also be very dangerous as it can cause hemolysis, jaundice, and cerebral palsy.

To know which vitamins a 1-year-old, 2-year-old, or 3-year-old child needs, parents must understand the child's needs to provide sufficient essential vitamins and minerals.

Vitamin K plays a vital role in regulating and supporting blood clotting in the body. A deficiency in vitamin K can impair blood clotting function, increasing the risk of bleeding, which in severe cases may lead to life-threatening hemorrhage. Therefore, proper and adequate vitamin K supplementation is essential to maintain normal blood coagulation and overall health.