Do you have a thyroid condition? And, if so, were you told to stop eating your beloved Brussels sprouts, broccoli, kale or other cruciferous veggies? The good news is you can bring those healthy and delicious super-foods back! Before we dive into how foods might affect thyroid function, let’s start with a few definitions:
Hashimoto’s Thyroiditis: An autoimmune form of thyroid disease in which the body’s immune system attacks the thyroid gland. This is actually the most common form of hypothyroidism today.
Goitrogens: Foods that may contribute to the formation of a goiter, or enlargement of your thyroid, by limiting iodine uptake and thyroid function. Cruciferous veggies fall under this category and include: broccoli, cauliflower, cabbage, Brussels sprouts and kale.
In the past, practitioners warned patients with hypothyroidism against consuming cruciferous vegetables. The fear was that glucosinolate compounds present in these veggies interfered with iodine absorption. As a result, goiter formation occurs, further reducing thyroid gland function. However, a decade of both animal and human studies prove cruciferous veggies do not negatively impact thyroid function EXCEPT in the case of a documented iodine deficiency. Iodine deficiency was a common cause of hypothyroidism in the 1950’s, but is rare today.
The Good News:
Cruciferous vegetables are popular. And for good reason. They’re a trend that’s here to stay due to their antioxidant and fiber-rich properties. From hormone balance to detoxification,these low-calorie super-foods belong on everyone’s table. Research states as long as iodine levels are sufficient, you are free to enjoy the many benefits of cruciferous veggies without worrying about decreasing thyroid function.
If you are unsure of your iodine status, or still uneasy about including cruciferous veggies with the presence of hypothyroidism, try these suggestions:
- Consume the majority of your cruciferous veggies cooked instead of raw. Cooking them reduces the glucosinalate content largely responsible for the goitrogenic effect.
- Limit the amount, initially, especially raw (this includes juicing those vegetables).
- Work on getting more iodine in your diet. We recommend getting iodine from plant sources versus iodized salt. Options include: kelp, sea veggies, dulse, nori, or kelp sprinkles. These add great flavor to savory dishes.
Try these veggie recipes the aid healthy thyroid function:
- Mcmillan, M., Spinks, E., & Fenwick, G. (1986). Preliminary Observations on the Effect of Dietary Brussels Sprouts on Thyroid Function. Human Toxicology, 5(1), 15-19.
- Cho YA, Kim J. Dietary factors affecting thyroid cancer risk: a meta-analysis. Nutr Cancer. 2015;67(5):811-817.