Yes, it is generally safe to eat seaweed during pregnancy, but it should be consumed in moderation. Many types of seaweed, especially red and green varieties like nori, are safe and nutritious as they provide essential nutrients such as iodine, folate, omega-3 fatty acids, calcium, iron, vitamins, and fiber, which support fetal development and maternal health. However, it is important to limit intake of brown seaweed varieties like kelp and wakame because they contain high levels of iodine, which in excess can affect thyroid function in both the mother and baby. The recommended guideline is to limit seaweed to about 1-2 servings per week, with a typical serving being a sheet of nori or a tablespoon of dried seaweed. Choosing seaweed from reputable sources, preferably tested for heavy metals and contaminants, is also advised since some seaweed can accumulate heavy metals harmful during pregnancy. Consulting a healthcare provider before regularly adding seaweed to the diet is recommended, especially if there are thyroid concerns or other health conditions. In summary, eating seaweed in moderate amounts during pregnancy can be beneficial, but care should be taken with the type, amount, and source of seaweed to avoid risks related to excessive iodine or heavy metal exposure.