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Got Iodine?
Pregnancy

Got Iodine?

2 min readWeek 10
Key takeaways
2 min
  • Consume iodine-rich foods like seaweed, sea fish, and seafood 2-3 times weekly to support your baby's brain and nervous system development during healthy pregnancy.
  • Avoid iodine supplements during the first 20 weeks of pregnancy as your baby's thyroid gland hasn't formed yet and overdose can cause harm.
  • Use iodized salt in your daily cooking to help meet increased iodine needs during pregnancy without relying on potentially unsafe supplements.
  • Get your daily iodine requirement from 100g of sea fish or a couple tablespoons of kelp salad rather than synthetic supplements.
  • Focus on natural food sources like cod, hake, shrimp, and mussels to safely increase iodine intake for optimal healthy pregnancy outcomes.

Pregnant women need increased iodine for baby's brain development. Get iodine from sea fish, seaweed, and seafood 2-3 times weekly rather than supplements. One 100g fish serving or two tablespoons of kelp salad meets daily requirements safely.

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Got Iodine?

During pregnancy, mothers need an increase in iodine in their daily diet because it is necessary for the production of thyroid hormone, which regulates the development of the nervous system and brain of a child [1].

Fortunately, in most developed countries, the problem of iodine deficiency is solved with the use of iodized salt. In the US, cereals and milk are also iodized, which are recommended for pregnant women as sources of calcium and dietary fiber [2].

However, many researchers have concerns taking iodine supplements as their safety has not been proven for pregnant mothers. The thyroid gland of a child may suffer due to an overdose [3] of iodine. Mothers should take care during the first 20 weeks of pregnancy to avoid iodine supplements, because baby’s thyroid gland is not yet formed. Whenever possible, it is best to obtain microelements from food [4].

The main sources of iodine:

  • laminaria (seaweed);

  • sea fish (cod or hake);

  • seafood (shrimp, mussels, octopuses).

One piece of fish (100 g) or a couple of spoons of kelp salad can satisfy the daily need for iodine. With the use of iodized salt, you will only need to eat seafood, fish or seaweed two to three times a week to ensure you are getting enough iodine.


Frequently asked questions

Pregnant women need increased iodine to support baby's brain development. One piece of fish (100g) or two tablespoons of kelp salad can satisfy daily iodine needs. With iodized salt, eating seafood 2-3 times weekly is sufficient.

Iodine supplements are not recommended during pregnancy, especially in the first 20 weeks. Overdose can harm your baby's thyroid gland development. Natural food sources are safer and more effective.

The best iodine sources include seaweed (kelp), sea fish like cod and hake, and seafood such as shrimp and mussels. Iodized salt, cereals, and milk also provide iodine in developed countries.

Iodine is essential for producing thyroid hormones that regulate your baby's nervous system and brain development. Deficiency can lead to developmental issues, making adequate intake crucial for healthy pregnancy.

Medical Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or qualified health provider with any questions you may have regarding a medical condition.

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Medically reviewed content

Reviewed by healthcare professionals · Updated June 3, 2025

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