The Truth About Iodine: Why More Isn't Always Better

Iodine is essential for thyroid hormones T3 & T4 — but too little AND too much can hurt thyroid health. Here's how much you need, where to get it, and when supplements backfire. ⚠️ Education only, not medical advice. If you're pregnant, breastfeeding, vegan, or have thyroid disease, talk to your clinician before supplementing. High-dose iodine can disrupt thyroid function. 🔬 IN THIS VIDEO: 00:00 Why iodine matters for your thyroid 00:35 How iodine makes T3 & T4 (metabolism, energy, growth) 01:20 Deficiency signs & goiter 02:05 Iodized salt vs sea salt / specialty salts 02:50 Iodine-rich foods: seafood, dairy, eggs, seaweed (and why levels vary) 03:40 How much you need: 150 mcg adults / 220 mcg pregnancy / 290 mcg breastfeeding 04:30 Prenatal vitamins — why some skip iodine (read labels) 05:00 Risks of high-dose supplements & kelp (upper limit 1,100 mcg/day) 05:35 When needs change: thyroid conditions & medications For most adults the RDA is 150 micrograms/day — 220 in pregnancy, 290 while breastfeeding. Tolerable upper intake is 1,100 mcg/day from all sources. You don't need to eat more salt to get iodine — if you use salt, choose iodized while staying within sodium limits. Seaweed can be excellent but hugely variable: kelp and concentrated iodine products can deliver far more than labeled. Read labels carefully. Sources & learn more: NIH Office of Dietary Supplements — Iodine Fact Sheet https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/ 💬 Do you check if your salt or multivitamin contains iodine? 👍 If this clarified iodine, like & subscribe for more Nutrition Science. 🔔 Subscribe: https://www.youtube.com/@seriesofthoughts?sub_confirmation=1 #Iodine #ThyroidHealth #Thyroid #NutritionScience #IodizedSalt #PregnancyNutrition #Minerals #Metabolism #HealthyEating #SeriesOfThoughts