Food and medication
Kelp and iodine and medication
Large amounts of iodine, mostly from kelp or seaweed supplements, can upset the thyroid and the medicines that treat it.
2 medicines on our checker are affected. Tap a medicine for every food and drink that matters with it.
Take care kelp and iodine with these medicines
- Carbimazole
Your thyroid gland needs iodine to make thyroid hormones, so eating high-iodine foods can make your symptoms worse.
Where this comes from
“This is because the thyroid gland needs iodine to make thyroid hormones. Eating foods that are high in iodine can make your symptoms worse.”
Information from the NHS website - Levothyroxine · thyroxine, synthroid, eltroxin
Kelp and iodine supplements can upset thyroid levels. Ask before taking them.
Foods and drinks that count as kelp and iodine
- Kelp supplements
- Seaweed
- Seaweed snacks
- Iodine supplements
- Sushi
Common questions
- Which medicines does kelp and iodine affect?
- 2 medicines on our checker: Carbimazole (take care), Levothyroxine (take care).
- Which foods count as kelp and iodine?
- Kelp supplements, Seaweed, Seaweed snacks, Iodine supplements, Sushi.
General information from NHS medicine pages and drug labels, not medical advice. Always follow your prescriber, pharmacist or the leaflet with your medicine. How we check.