Iodine in Plant Milks


Plant foods, including most fruits, nuts, and vegetables, are low in iodine, although their iodine content varies depending on the soil they’re grown in and irrigation and fertilization practices.

The main sources of iodine for people living in the United States tend to be seafood and dairy products. Milk and other dairy products are not naturally high in iodine. Cows are given iodine in their diets and Iodine-containing disinfectants are used to clean milking machines—the iodine from these products ends up in the cow’s milk.

Are plant milks comparable to cow’s milk in terms of iodine content? Apparently not.

Researchers examined 30 different plant milks from 16 different companies in the U.S. based on soy, almonds, rice, coconuts, pistachios, walnuts, hemp, and cashews (1). The milks averaged 3.1 µg of iodine in an 8-ounce glass. In comparison, cow’s milk had more than 30 times more iodine (96.8 µg in 8-ounces).

You can read about a similar study from the UK in Plant Milks and Iodine: Recommendations for Vegans.

Some have proposed adding iodine to plant milks—there are a few products with added iodine but this is not yet a common practice.

See our section on Daily Needs for information on getting adequate iodine on a vegan diet.

Reference

1. Ma W, He X, Braverman L. Iodine content in milk alternatives. Thyroid. 2016 Sep;26(9):1308-10

Leave a comment

Your email address will not be published. Required fields are marked *

Before you comment, please read:

  • If you have a question about whether it's okay to cut supplements in half or combine supplements to achieve the dose we recommend, the answer is “Yes.” Be aware that nutrient recommendations are only estimates—it's not necessary to consume the exact amount we recommend every single day.
  • We aren't able to respond to questions about which brands of supplements to take.
  • We cannot provide personal nutrition advice for specific health conditions. If you need private counseling, here's a list of plant-based dietitians. You can also get reliable information from the MayoClinic.com and from the National Institutes of Health.
  • We urge you to consult with a qualified health professional for answers to your personal questions.