# Seaweed and Nori During Pregnancy

Source: https://www.pregnancypowerhour.com/foods/seaweed-nori
Last updated: 2026-07-15

> Seaweed and nori can be a nourishing part of your pregnancy diet with careful attention to iodine content and sourcing to support both your and your baby's thyroid health.

Seaweed and nori can be a nourishing addition to your pregnancy diet, provided you are mindful of iodine levels and sourcing. Understanding the nuances of different types of seaweed allows you to make informed decisions that support your well-being and your baby's development. As a trained full spectrum doula, I often remind clients that pregnancy is a season of listening to your body and making choices that feel right for you, supported by evidence.

Iodine is a crucial nutrient during pregnancy, essential for healthy thyroid function in both you and your developing baby. The World Health Organization (WHO) and the American College of Obstetricians and Gynecologists (ACOG) recommend a daily iodine intake of 220–250 mcg for pregnant individuals. While many prenatal vitamins include iodine, incorporating it through food can also be a gentle approach. Nori, the dried seaweed sheets commonly used for sushi, is relatively low in iodine and generally considered safe in normal amounts. Enjoying a sushi roll made with nori, perhaps alongside some [Eggs (Cooked) During Pregnancy](/foods/eggs) for protein, can be a balanced choice.

However, not all seaweed is created equal when it comes to iodine content. Certain varieties, like kelp and kombu, can contain significantly higher amounts—ranging from 1,000 to over 10,000 mcg of iodine per serving. Consuming excessive amounts of iodine, particularly from these concentrated sources, can lead to thyroid problems for both the pregnant parent and the fetus. The WHO suggests an upper limit of 600 mcg of iodine per day, though some sources allow for up to 1,100 mcg. This is why understanding the type of seaweed you're consuming is key to making calm, clear choices.

Beyond iodine, another consideration for seaweed is the potential for heavy metal contamination, including arsenic and cadmium, in some varieties. The Environmental Working Group (EWG) has flagged concerns regarding some Asian-sourced seaweed. This highlights the importance of choosing reputable brands and being aware of where your seaweed products originate. Just as you might consider the source of your [Sweet Potato During Pregnancy](/foods/sweet-potato) for optimal nutrition, thinking about seaweed sourcing offers similar benefits.

Ultimately, you get to decide what feels best for your body and your pregnancy. If you enjoy seaweed, focusing on nori in moderation and being cautious with kelp and kombu is a practical approach. Integrating a variety of nutrient-dense foods, like a comforting bowl of [Oatmeal During Pregnancy](/foods/oatmeal) in the morning, alongside these mindful choices, can contribute to a well-rounded and supportive diet. Always consult with your healthcare provider for personalized guidance regarding your specific dietary needs and any underlying health conditions. Your provider is your best resource for your specific situation.