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Unveiling the Truth about Brassicas and Thyroid Health


In today's discourse, I'm delving into a subject close to my heart: the intricate relationship between brassicas and thyroid function. As a passionate advocate for holistic nutrition, the discussion surrounding these verdant wonders—broccoli, kale, cabbage, and their kin—often arises with my clients. The perennial question: "Should brassicas be avoided for thyroid well-being?" As a practitioner of Functional Nutrition, my response inevitably hinges on a nuanced understanding of individual physiology.


According to recent estimates, as many as 20 million Americans could have low thyroid function. Of those 20 million, 60% may not even know it. Women are 5 to 8 times more likely than men to suffer from thyroid dysfunction, with 1 in 8 women developing thyroid issues in their lifetime. In recognition, during National Thyroid Awareness month, I’ve rounded up some of our most popular resources on the topic.


What Exactly Are Brassicas?

The term "brassica" encompasses a diverse array of cruciferous vegetables, from the familiar broccoli and kale to the less renowned Brussels sprouts and cauliflower. This botanical family, characterized by their distinctive flowering heads, includes an assortment of greens and even certain root vegetables like radishes and turnips. Essentially, brassicas are nature's bounty encapsulated in the Latin word for "cabbage."

Nutritional Marvels of Brassicas

Brassicas are nature's nutritional powerhouses, brimming with essential vitamins such as C, K, and a spectrum of B vitamins, alongside potent carotenoids. Their culinary allure notwithstanding, concerns often revolve around their goitrogenic properties, particularly for individuals grappling with thyroid imbalances.

Understanding Goitrogens

Beyond their nutritional bounty, brassicas harbor compounds known as goitrogens, which can potentially impede thyroid hormone synthesis under specific conditions. Factors such as individual tolerance levels, mineral status—particularly iodine—and dietary habits play pivotal roles in determining the impact of goitrogens.

Navigating Brassica Consumption

While some experts argue that goitrogen intake is unlikely to pose a significant threat under normal dietary circumstances, personalized considerations remain paramount. Functional Nutrition underscores the unique biochemical makeup of each individual, highlighting the variability in nutritional requirements and tolerances. As an advocate for personalized wellness, I emphasize that brassica avoidance isn't universally warranted, given their abundant reserves of antioxidants and dietary fiber.

Cooking: A Potential Solution

The conventional wisdom suggests that cooking may mitigate the effects of goitrogens, although definitive guidelines regarding temperature and duration remain elusive. Nonetheless, culinary preparation offers a practical approach to balancing the benefits and risks associated with brassica consumption.

Embracing Brassicas for Optimal Health

In conclusion, the verdict is clear: brassicas can be embraced as allies in the pursuit of holistic well-being, even for those managing thyroid conditions. As a fervent proponent of Functional Nutrition, I celebrate the myriad health benefits conferred by these cruciferous champions. From bolstering liver function to enhancing antioxidant defenses, brassicas epitomize nature's unparalleled ability to nurture and heal. So, let's raise our culinary banners high and savor the goodness of brassicas without hesitation. After all, in the realm of nutrition, diversity is key, and brassicas offer a tantalizing tapestry of flavors and nutrients to enrich our journey towards vitality and longevity.

References:,  Andrea Nakayama

Quirante-Moya S, García-Ibañez P, Quirante-Moya F, Villaño D, Moreno DA. The Role of Brassica Bioactives on Human Health: Are We Studying It the Right Way?. Molecules. 2020;25(7):1591. Published 2020 Mar 30. doi:10.3390/molecules25071591

Soengas P, Velasco P, Fernández JC, Cartea ME. New Vegetable Brassica Foods: A Promising Source of Bioactive Compounds. Foods. 2021;10(12):2911. Published 2021 Nov 24. doi:10.3390/foods10122911

Ağagündüz D, Şahin TÖ, Yılmaz B, Ekenci KD, Duyar Özer Ş, Capasso R. Cruciferous Vegetables and Their Bioactive Metabolites: from Prevention to Novel Therapies of Colorectal Cancer. Evid Based Complement Alternat Med. 2022;2022:1534083. Published 2022 Apr 11. doi:10.1155/2022/1534083

Babiker A, Alawi A, Al Atawi M, Al Alwan I. The role of micronutrients in thyroid dysfunction. Sudan J Paediatr. 2020;20(1):13-19. doi:10.24911/SJP.106-1587138942


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