Diet and nutritionBroccoli and cabbage — are they harmful for an unhealthy thyroid?
Sources: 6 · Article: 8 531 characters
Henryk Różański advises people with hypothyroidism to be cautious with cruciferous vegetables.
- Some compounds in these plants may interfere with the binding of iodine, which is needed to make thyroid hormones.
- Różański advises people who eat cruciferous vegetables to make sure they get enough iodine in their diet.
- The properties of cruciferous plants may be used to treat hyperthyroidism.
What the authors write
Henryk Różański
Some compounds in cruciferous plants may interfere with the binding of iodine, which is needed to make thyroid hormones.
„On the one hand, they have antiseptic and antibacterial effects, inhibit the growth of some cancers, and have an anti-atherosclerotic effect. On the other hand, some of them prevent iodine from binding to the amino acids in thyroid hormones. This lowers the level of active thyroxine, leading to hypothyroidism and its further consequences.”Z jednej strony działają one odkażająco, przeciwbakteryjnie, hamują rozwój niektórych nowotworów, wywierają wpływ przeciwmiażdżycowy, z drugiej jednak strony – niektóre z nich uniemożliwiają wiązanie jodu przez aminokwasy hormonów tarczycy. Spada przez to poziom aktywnej tyroksyny, następuje niedoczynność tarczycy i dalsze tego następstwa.
Henryk Różański
People with hypothyroidism are advised to be cautious about eating cruciferous plants.
„However, it should be remembered that people with hypothyroidism should be cautious about eating cruciferous plants and taking preparations based on plants containing the glycoside 2-hydroxybutylene-3-isothiocyanate (goitrin) = thiocyanates.”Należy jednak pamiętać, że osoby cierpiące z kolei na niedoczynność tarczycy powinny zachować ostrożność w spożywaniu roślin kapustnych oraz zażywaniu preparatów opartych na roślinach zawierających glikozyd 2-hydroksybutyleno-3-izotiocyjanianu (goitryna) =tiocyjaniany.
Henryk Różański
Impaired iodine binding may lower active thyroxine levels and lead to hypothyroidism.
„This lowers the level of active thyroxine, leading to hypothyroidism and its further consequences. These properties can be used skillfully to treat hyperthyroidism. However, it should be remembered that people with hypothyroidism should be cautious about eating cruciferous plants and taking preparations based on plants containing the glycoside 2-hydroxybutylene-3-isothiocyanate (goitrin) = thiocyanates.”Spada przez to poziom aktywnej tyroksyny, następuje niedoczynność tarczycy i dalsze tego następstwa. W sposób umiejętny właściwości te mogą być wykorzystane w leczeniu nadczynności tarczycy. Należy jednak pamiętać, że osoby cierpiące z kolei na niedoczynność tarczycy powinny zachować ostrożność w spożywaniu roślin kapustnych oraz zażywaniu preparatów opartych na roślinach zawierających glikozyd 2-hydroksybutyleno-3-izotiocyjanianu (goitryna) =tiocyjaniany.
Henryk Różański
People who eat cruciferous vegetables should make sure they get enough iodine in their diet.
„If someone eats cruciferous vegetables, they should make sure they get enough iodine in their diet to prevent potential side effects from impaired iodination of tyrosine and thyronine in the thyroid.
Head cabbage – Brassica oleracea varium capitata (L.) Alef., Wolsztyn, July 2008.”Jeżeli ktoś lub warzywa kapustne powinien zadbać o dostateczną podaż jodu w diecie, aby zapobiec potencjalnym skutkom ubocznym zaburzonego jodowania tyrozyny i tyroniny w tarczycy.
Kapusta głowiasta – Brassica oleracea varium capitata (L.) Alef., Wolsztyn, lipiec 2008 r.
Henryk Różański
The properties of cruciferous plants may be used to treat hyperthyroidism.
„These properties can be used skillfully to treat hyperthyroidism. However, it should be remembered that people with hypothyroidism should be cautious about eating cruciferous plants and taking preparations based on plants containing the glycoside 2-hydroxybutylene-3-isothiocyanate (goitrin) = thiocyanates.”W sposób umiejętny właściwości te mogą być wykorzystane w leczeniu nadczynności tarczycy. Należy jednak pamiętać, że osoby cierpiące z kolei na niedoczynność tarczycy powinny zachować ostrożność w spożywaniu roślin kapustnych oraz zażywaniu preparatów opartych na roślinach zawierających glikozyd 2-hydroksybutyleno-3-izotiocyjanianu (goitryna) =tiocyjaniany.
Research from PubMed · Europe PMC
We selected 2 studies with the best, positive results. This is a selection, not a full review of all research.
Total number of studies on this topic in PubMed: 26.
In a 12-week study, a broccoli sprout drink did not change thyroid function test results or autoimmunity, suggesting it was safe for the group studied.
Aim of the study: Sulforaphane is a redox-active natural product found in cruciferous vegetables such as broccoli. Products made from broccoli sprouts are promising agents for preventing diseases related to oxidative stress, but some have long been suspected of being toxic to the thyroid.
Results: Previous studies investigating the possible effects of sulforaphane-related compounds from natural product extracts on the thyroid were quite short and/or had inconsistent results. To investigate whether long-term exposure to a beverage enriched with sulforaphane and its precursor glucoraphanin may affect thyroid function, we analyzed biochemical measures of thyroid function and thyroid autoimmunity in 45 female participants in a randomized clinical trial at baseline and after 84 days of beverage administration. Serum levels of thyroid-stimulating hormone, free thyroxine and thyroglobulin were not affected by the treatment, and neither was the thyroid autoimmunity status of participants. These results provide evidence in favor of the safety of chemoprevention strategies that target the activation of Nrf2 to protect against environmental exposures and other oxidative stress-related pathologies.
Money for the studygovernment, public institutions · National Institutes of Health, Swiss Society for Endocrinology-Diabetology, Swiss National Science Fund
Do the authors have ties to companies?not stated
Did a manufacturer help with the study?unknown
Type of studystudy with random allocation to groups (RCT)
Participants45
“Not stated” does not mean nobody paid — the database does not always record it.
The review indicates that avoiding cruciferous vegetables has no proven benefit for people with thyroid disorders.
Aim of the study: Increasingly, patients are asking their physicians about the benefits of dietary and alternative approaches to manage their diseases, including thyroid disease. We seek to review the evidence behind several of the vitamins, minerals, complementary medicines, and elimination diets that patients are most commonly using for the treatment of thyroid disorders.
Results: While many patients are seeking to avoid conventional therapy and instead turn to alternative and dietary approaches to thyroid disease management, many of the most popular approaches have no proven benefit or have not been well studied. It is our responsibility to educate our patients about the evidence for or against benefit, potential harms, or dearth of knowledge behind these strategies.
Money for the studynot stated
Do the authors have ties to companies?not stated
Did a manufacturer help with the study?unknown
Type of studydiscussion of other studies
“Not stated” does not mean nobody paid — the database does not always record it.
Perspectives and opinion materials
The content below presents the authors’ opinions, interpretations and hypotheses. It is not treated as equal to scientific studies and systematic reviews.
Orthomolecular Medicine News Service Opinion material
„Plant Toxins and Anti-Nutrients To survive in nature, plants produce defensive chemicals: Lectins (beans, grains, tomatoes): Associated with intestinal permeability (leaky gut) and immune activation [2,3] Oxalates (spinach, almonds, sweet potatoes): Bind minerals, promote kidney stones and joint pain [4,5] Phytates (legumes, whole grains): Inhibit absorption of zinc, iron, and calcium [6-8] Goitrogens (cruciferous vegetables): Can impair thyroid function if consumed raw and in excess [9,10] For individuals with autoimmune or inflammatory conditions, these compounds may trigger or exacerbate symptoms. 2.”Plant Toxins and Anti-Nutrients To survive in nature, plants produce defensive chemicals: Lectins (beans, grains, tomatoes): Associated with intestinal permeability (leaky gut) and immune activation [2,3] Oxalates (spinach, almonds, sweet potatoes): Bind minerals, promote kidney stones and joint pain [4,5] Phytates (legumes, whole grains): Inhibit absorption of zinc, iron, and calcium [6-8] Goitrogens (cruciferous vegetables): Can impair thyroid function if consumed raw and in excess [9,10] For individuals with autoimmune or inflammatory conditions, these compounds may trigger or exacerbate symptoms. 2.
Orthomolecular Medicine News Service Opinion material
„Only about 30 percent of us get either two servings of fruit or three servings of vegetables [4], and only 11 percent of Americans are meeting U.S. Department of Agriculture (USDA) guidelines for both. [5] Surveys have found that there are a whopping 20 percent of folks out there that eat absolutely no veggies at all. [6] Is it really so daring to recommend we skip red meat altogether? Would the Digest lose subscribers? Would the Digest lose advertisers? Well, they must be losing somebody, because the advice in the article encourages continuing to consume red meat and risk death and disease.”Only about 30 percent of us get either two servings of fruit or three servings of vegetables [4], and only 11 percent of Americans are meeting U.S. Department of Agriculture (USDA) guidelines for both. [5] Surveys have found that there are a whopping 20 percent of folks out there that eat absolutely no veggies at all. [6] Is it really so daring to recommend we skip red meat altogether? Would the Digest lose subscribers? Would the Digest lose advertisers? Well, they must be losing somebody, because the advice in the article encourages continuing to consume red meat and risk death and disease.
Orthomolecular Medicine News Service Opinion material
„More important sources of oxalate for most individuals are the amount of cruciferous vegetables, tea, and other sources in the diet. These oxalates bind with the excess calcium that is in our dairy, fortified foods, and supplements. To prevent oxalate stones, in general, and when taking oral vitamin C, it is important to drink adequate amounts of fluid and avoid excessive calcium levels in the diet. In addition, magnesium supplements (300-500 mg/day, in malate, citrate, or chloride form) can prevent calcium from precipitating with oxalate to form stones.”More important sources of oxalate for most individuals are the amount of cruciferous vegetables, tea, and other sources in the diet. These oxalates bind with the excess calcium that is in our dairy, fortified foods, and supplements. To prevent oxalate stones, in general, and when taking oral vitamin C, it is important to drink adequate amounts of fluid and avoid excessive calcium levels in the diet. In addition, magnesium supplements (300-500 mg/day, in malate, citrate, or chloride form) can prevent calcium from precipitating with oxalate to form stones.
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