Iodine
Iodized salt, Seafood, Dairy foods.
Back to TagsThyroid disease, thyroid medication, pregnancy, infertility treatment, autoimmune disease, and high-dose iodine or kelp use require clinician guidance. Both too little and too much iodine can be problematic.
Source mix: Official Reference, Government Health Agency, Food Database, Traditional / Safety Reference. Iodine Fact Sheet for Health Professionals Selenium Fact Sheet for Health Professionals Zinc Fact Sheet for Health Professionals Dietary Guidelines for Americans FoodData Central Herbs at a Glance Mixing Medications and Dietary Supplements Can Endanger Your Health Licorice Root
Tag
Thyroid & Hormones
Thyroid and hormone references connect iodine, selenium, and nutrient or botanical contexts relevant to thyroid hormone production, thyroid-related enzymes, and supplement cautions.
thyroidhormonesiodineseleniumt3t4metabolismgoiter
Linked Items
6
May Support
4
Deficiency Signs
0
Cautions
2
Quick Compare
| Item | Type | Relationship | Evidence |
|---|---|---|---|
| Iodine | nutrient | May Support | Official NIH ODS nutrient-role framing; both low and excessive iodine can matter. Official Reference |
| Selenium | nutrient | May Support | Official NIH ODS nutrient-role framing. Official Reference |
| Zinc | nutrient | May Support | Official NIH ODS nutrient-role framing; thyroid-specific claims need separate evidence review. Official Reference |
| Seafood Servings | bioactive | May Support | Food-pattern context with mercury-aware guidance where relevant. Government Health Agency |
| Ashwagandha | bioactive | Caution / Limited Evidence | Botanical safety framing from source trail and app catalog. Traditional / Safety Reference |
| Licorice Root | bioactive | Caution / Limited Evidence | NCCIH licorice safety framing. Traditional / Safety Reference |
Foods First
Selenium
Brazil nuts, Seafood, Meat and eggs.
Zinc
Oysters and meat, Dairy foods, Legumes and seeds.
Seafood Servings
Salmon, sardines, trout, herring, anchovies.
Ashwagandha
Ashwagandha root.
Licorice Root
Glycyrrhiza glabra root, Glycyrrhiza uralensis root.
Medication & Safety Cautions
Iodine
Iodine is required for thyroid hormone production. | Avoid high-dose iodine supplementation without professional guidance.
Selenium
Selenium supports selenoproteins involved in antioxidant and thyroid-related functions. | The margin between adequate intake and excessive intake is relatively narrow; respect the UL.
Zinc
Zinc participates in many enzymes and immune functions that can overlap with endocrine health contexts. | Long-term high-dose zinc can interfere with copper status.
Seafood Servings
Seafood can provide iodine, selenium, vitamin D in some fish, and EPA/DHA omega-3 fats. | Pregnancy and child guidance should include mercury-aware choices.
Ashwagandha
Ashwagandha has thyroid-disease cautions in the catalog and should not be treated as casual use in thyroid contexts. | pregnancy/breastfeeding | thyroid disease | autoimmune disease
Licorice Root
Licorice can affect potassium, blood pressure, and corticosteroid-related contexts, which can overlap with endocrine medication concerns. | blood pressure | low potassium | heart disease
Key Studies & Fixed References
These are the dated references used for this tag. Live research searches can change; these links explain the fixed wording shown on this page.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Iodide, Iodate, Kelp and seaweed iodine.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Selenomethionine, Selenium yeast, Selenite.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Zinc supplement forms, Elemental zinc context, Zinc absorption and iron interaction.
U.S. Department of Agriculture and U.S. Department of Health and Human Services | Acquired 2026-07-23 | Government Health Agency
Food-pattern guidance, Added sugars, Saturated fat.
U.S. Department of Agriculture | Acquired 2026-07-23 | Food Database
Food composition and natural source verification.
National Center for Complementary and Integrative Health | Acquired 2026-07-23 | Traditional / Safety Reference
Botanical safety framing, Herb evidence summaries.
U.S. Food and Drug Administration | Acquired 2026-07-23 | Government Health Agency
Supplement-medication interaction warning language.
National Center for Complementary and Integrative Health | Acquired 2026-07-23 | Traditional / Safety Reference
Licorice root safety, Licorice interaction cautions, Traditional-use context.
May Support
Iodine
nutrientOfficial Reference
Iodine is required for thyroid hormone production.
Evidence note: Official NIH ODS nutrient-role framing; both low and excessive iodine can matter.
Sources: Iodine Fact Sheet for Health Professionals (2026-07-23)Official Reference
Selenium
nutrientOfficial Reference
Selenium supports selenoproteins involved in antioxidant and thyroid-related functions.
Evidence note: Official NIH ODS nutrient-role framing.
Sources: Selenium Fact Sheet for Health Professionals (2026-07-23)Official Reference
Zinc
nutrientOfficial Reference
Zinc participates in many enzymes and immune functions that can overlap with endocrine health contexts.
Evidence note: Official NIH ODS nutrient-role framing; thyroid-specific claims need separate evidence review.
Sources: Zinc Fact Sheet for Health Professionals (2026-07-23)Official Reference
Seafood Servings
bioactiveGovernment Health Agency
Seafood can provide iodine, selenium, vitamin D in some fish, and EPA/DHA omega-3 fats.
Evidence note: Food-pattern context with mercury-aware guidance where relevant.
Sources: Dietary Guidelines for Americans (2026-07-23)Government Health Agency, FoodData Central (2026-07-23)Food Database
Caution / Limited Evidence
Ashwagandha
bioactiveTraditional / Safety Reference
Ashwagandha has thyroid-disease cautions in the catalog and should not be treated as casual use in thyroid contexts.
Evidence note: Botanical safety framing from source trail and app catalog.
Sources: Herbs at a Glance (2026-07-23)Traditional / Safety Reference, Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)Government Health Agency
Licorice Root
bioactiveTraditional / Safety Reference
Licorice can affect potassium, blood pressure, and corticosteroid-related contexts, which can overlap with endocrine medication concerns.
Evidence note: NCCIH licorice safety framing.
Sources: Licorice Root (2026-07-23)Traditional / Safety Reference, Mixing Medications and Dietary Supplements Can Endanger Your Health (2026-07-23)Government Health Agency