Giving a breastfed infant a Vitamin K1 shot virtually eliminates the chance of life-threatening Vitamin K deficiency bleeding. The only known adverse effects of the shot are pain, bleeding, and bruising at the site of the injection.
A regimen of three doses of oral Vitamin K1 at birth, 1 week, and 1 month reduces the risk of bleeding. Although oral Vitamin K1 is better than nothing, it is not 100% effective. It is important for parents to administer all 3 doses in order for this regimen to help lower the risk of late Vitamin K deficiency bleeding.
Recently, there have been many myths, misconceptions, and misinformation floating around the internet and social media about Vitamin K. It is important that parents look at the facts so that their consent or refusal is informed. Right now, parents who have been declining Vitamin K may not have all the information, or they may have been given inaccurate information.