Free deliveryWhy The Wellness recommends this
Curated, not stocked.
Iodine deficiency is underappreciated in the UK, particularly among those eating plant-based or dairy-free diets. We include this Pure Encapsulations formulation because it delivers iodine in a well-absorbed form, without unnecessary additives. We recommend it specifically for people with a confirmed or suspected dietary gap — ideally identified through a thyroid or nutritional blood panel rather than taken speculatively.
About this product
Iodine (potassium iodide)
Pure Encapsulations Iodine (Potassium Iodide) is a straightforward single-ingredient supplement delivering iodine in potassium iodide form — one of the most bioavailable and widely studied forms of this essential mineral.
Iodine is a trace mineral that the body cannot produce on its own. It is indispensable for the synthesis of thyroid hormones T3 and T4, which regulate metabolic rate, temperature control, and energy production throughout the body. Adequate iodine intake is also important for normal cognitive function, particularly in periods of increased physiological demand.
This supplement suits people who have identified a shortfall in dietary iodine — common in those who avoid dairy and seafood, follow plant-based diets, or live in areas with iodine-depleted soils. It is also relevant for individuals whose thyroid function has been flagged on a blood panel but who have not yet reached a clinical threshold requiring medication.
Because iodine interacts directly with thyroid physiology, it is not a supplement to take casually or in excess. Too much iodine can be as disruptive to thyroid function as too little. Anyone with an existing thyroid condition or taking thyroid medication should discuss use with their doctor before starting.
Pure Encapsulations is a brand known for clean, minimal formulations — typically free from unnecessary fillers and common allergens — making it a sensible choice where ingredient simplicity matters.
What it does
Benefits
- 01
Supports synthesis of thyroid hormones T3 and T4
- 02
May help maintain normal metabolic rate and energy
- 03
Relevant for diets low in dairy, seafood, or iodised salt
- 04
May support cognitive function where intake is insufficient
- 05
Single-ingredient, minimal formulation for precise dosing
Get the most from it
How to use
Take 1 capsule daily, as directed on the packaging. Taking it with a meal may aid tolerance. Do not exceed the recommended dose without guidance from a clinician, as iodine has a narrow therapeutic window.
What's inside
Ingredients
View full ingredient list
Potassium Iodide
Common questions
Frequently asked
Who is most likely to benefit from an iodine supplement?
People who avoid dairy products, seafood, and iodised salt are most at risk of low intake. Vegans and those on restricted diets are commonly affected. A thyroid or nutritional blood panel is the most reliable way to confirm a shortfall before supplementing.
Can I take this if I already have a thyroid condition?
Not without medical guidance. Both hypothyroidism and hyperthyroidism can be sensitive to changes in iodine intake. If you have a diagnosed thyroid condition or take thyroid medication, speak with your doctor before starting this supplement.
Is it possible to take too much iodine?
Yes. Iodine has a narrow range between sufficiency and excess, and chronically high intake can paradoxically suppress thyroid function or trigger autoimmune thyroid responses in susceptible individuals. Stick to the recommended dose and avoid combining with other iodine-containing supplements unless advised by a clinician.
How long before I might notice a difference?
If low iodine has been contributing to symptoms such as fatigue or sluggish metabolism, some people notice gradual improvement over several weeks as thyroid hormone levels stabilise. Changes in blood markers are typically measurable within 4 to 8 weeks, though this varies by individual.
Why potassium iodide specifically?
Potassium iodide is a stable, inorganic salt form of iodine that is well absorbed and has been used in clinical and public health settings for decades. It is the standard form used in most well-characterised iodine supplements.
Doctor-guided care
Test before you supplement.
Bloods are the only way to know what your body actually needs. We'll tell you which of these supplements earn their place.
Book a panelFrom real customers
Reviews
No reviews yet
Be the first to share your experience.
Loading reviews…