Free deliveryWhy The Wellness recommends this
Curated, not stocked.
Thorne earned its place on our shelves because their formulations are built around nutritional logic, not marketing. Iodine and L-Tyrosine are the two dietary precursors most directly involved in thyroid hormone production, and a supplement that addresses both simultaneously makes sense for patients whose blood work points to low iodine intake. We recommend it as part of a clinician-guided nutrition plan, not as a standalone fix.
About this product
Iodine & Tyrosine
Iodine & Tyrosine by Thorne is a two-ingredient supplement designed to support thyroid hormone synthesis. Iodine is an essential mineral that the body cannot produce on its own; without adequate intake, the thyroid gland cannot manufacture thyroxine (T4) or triiodothyronine (T3). L-Tyrosine is the amino acid that forms the structural backbone of both hormones — iodine attaches to it during synthesis. Together, they supply the two raw materials the thyroid depends on most directly.
This combination suits people whose diet may be low in iodine — common in those avoiding dairy, seafood, or iodised salt — and those who want targeted nutritional support during periods of fatigue, poor cold tolerance, or sluggish metabolism that a clinician has linked to suboptimal thyroid function. It is not a replacement for thyroid medication and should not be used to self-treat a diagnosed thyroid condition without medical guidance.
Thorne is a brand with a long-standing reputation for manufacturing rigour and straightforward formulations. This product reflects their typical approach: a focused ingredient list, no unnecessary fillers, and a rationale rooted in basic nutritional biochemistry rather than trend-driven blending. It fits neatly into a nutrition-focused routine where a blood panel has highlighted low iodine intake or borderline thyroid markers.
What it does
Benefits
- 01
Supplies iodine and tyrosine for thyroid hormone synthesis
- 02
May support metabolism and energy in low-iodine diets
- 03
Useful for those avoiding dairy, seafood, or iodised salt
- 04
Targeted support during fatigue linked to thyroid underfunction
- 05
Minimal-ingredient formula with no unnecessary additives
Get the most from it
How to use
Follow the dosage on the packaging. Based on the product labelling, one capsule daily is the standard serving — take it with a meal unless your clinician advises otherwise.
What's inside
Ingredients
View full ingredient list
Iodine, L-Tyrosine
Common questions
Frequently asked
Who is this supplement most relevant for?
It is most relevant for people with confirmed or suspected low iodine intake — often those following a plant-based diet, avoiding dairy and seafood, or living in regions where iodised salt is not widely used. It may also be of interest to anyone whose clinician has noted borderline thyroid markers alongside dietary gaps.
Can I take this alongside thyroid medication such as levothyroxine?
You should speak to your prescribing doctor before adding any iodine-containing supplement to a regimen that includes thyroid medication. Iodine intake can influence thyroid hormone levels, and the interaction depends on your individual diagnosis and current dose.
Is this suitable if I have an overactive thyroid (hyperthyroidism)?
No — additional iodine is generally contraindicated in hyperthyroidism and certain thyroid conditions such as Graves' disease. Consult your doctor before use if you have any diagnosed thyroid disorder.
How long before I might notice a difference?
Nutritional deficiencies typically take weeks to correct, and any shift in energy or metabolism would be gradual. If you have not noticed a change after six to eight weeks, it is worth revisiting your blood markers with a clinician to assess whether the supplement is meeting its intended purpose.
Does this contain any common allergens or unnecessary fillers?
Thorne is known for clean, minimal formulations, but allergen and excipient details vary by batch. Check the product label for the full ingredient list and any allergen declarations before use.
Doctor-guided care
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