# Vitamin K in the first trimester

Source: https://www.pregnancypowerhour.com/nutrition/vitamin-k-trimester-1
Last updated: 2026-07-01

> In the first trimester, your body's baseline Vitamin K needs are typically met through a balanced diet, supporting foundational maternal health.

In the first trimester, understanding your body's baseline Vitamin K needs often begins with recognizing that adequate intake is typically achieved through a balanced and varied diet. Vitamin K plays a role in various bodily functions, and for most individuals in early pregnancy, focusing on nutrient-dense foods is a practical approach to meeting the suggested adequate intake of 90 mcg/day.

This early stage of pregnancy is a time of incredible foundational development, and while many nutrients, like [Iodine in the first trimester](/nutrition/iodine-trimester-1) and [Zinc in the first trimester](/nutrition/zinc-trimester-1), often receive significant attention, Vitamin K's contribution to overall maternal well-being is also valuable. It’s reassuring to know that many common and accessible foods are excellent sources of this vitamin, making it straightforward to incorporate into your daily meals without needing specialized supplements unless advised by your care provider. Prioritizing a food-first approach helps ensure you're getting a spectrum of beneficial compounds.

Key dietary sources of Vitamin K include a variety of leafy green vegetables such as kale and spinach, as well as broccoli and Brussels sprouts. Fermented foods like natto are also notable contributors. Incorporating these into your meals can naturally help you reach the suggested daily intake. As you navigate your first trimester, focusing on these whole foods can offer a sense of calm and clarity regarding your nutritional choices.

It's important to note a unique aspect of Vitamin K related to pregnancy and newborns: Vitamin K crosses the placenta poorly. This means newborns are typically born with low stores of the vitamin, which is why a universal Vitamin K injection is recommended at birth. This practice helps prevent Vitamin K Deficiency Bleeding (VKDB) in newborns, a serious condition that can lead to intracranial hemorrhage. While maternal Vitamin K intake is important for your own health, evidence suggests that maternal supplementation alone does not adequately replace the need for the newborn injection.

As you move through your pregnancy and consider your nutritional landscape, remember that your care provider is your best resource for personalized advice. They can help you understand your specific needs, especially as your body's requirements shift, much like how considerations for nutrients like [Iodine in the second trimester](/nutrition/iodine-trimester-2) might evolve. Making informed decisions, in collaboration with your provider, empowers you to feel confident and clear about your health choices during this special time.