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Why should I take an iodine-free multivitamin?

 The complete guide to multivitamins: what do they do?

In an ideal world, we should get all the vitamins and minerals we need from a healthy, balanced diet. Sometimes, however, this just isn’t achievable. And there are many possible reasons for this: daily pressures can deplete the body’s nutrient reserves; the demands and pressures of modern life often make unhealthy, nutrient-poor, convenience food more appealing; and pollution, toxin exposure, and soil nutrient depletion can inhibit nutrient intake.
Supplementing with a multivitamin can be a convenient, fuss-free insurance policy to cover these nutritional shortfalls. Multivitamin formulas aren’t a substitute for healthy eating; they simply plug small but meaningful gaps to prevent low nutrient intakes.
Of course, everyone’s nutritional needs vary depending on circumstance, age, and gender. And for some people, taking an iodine-free multi is the most appropriate choice. Here, we take a look at some of the reasons why.

What does iodine do in the body?

Iodine contributes to the normal production of thyroid hormones and thyroid function. It also contributes to normal cognitive function, energy-yielding metabolism, nervous system function, and the maintenance of normal skin.
Iodine is an important trace mineral required at all life stages, especially during the early years. That’s why women need slightly more iodine during pregnancy.
Since the body can’t produce iodine, you need an adequate supply from food sources, such as those of marine origin, like shellfish or seaweed.
There’s no doubt iodine is vital for good health; your entire metabolism and thyroid depend on it. But some people need to exercise caution when it comes to supplemental iodine. 

Thyroid issues and supplemental iodine

Given iodine’s role in thyroid function, you should always choose an iodine-free multivitamin if you experience thyroid issues, such as hypothyroidism (an underactive thyroid) or hyperthyroidism (an overactive thyroid). Taking too much may exacerbate your condition and worsen symptoms.
For instance, if you suffer from hyperthyroidism (an overactive thyroid), supplementing with iodine may lead to increased anxiety, irritability, insomnia, and weight loss.

Medication and supplemental iodine

Supplemental iodine is known to interact with certain medications, especially those used to manage thyroid conditions. Lithium (a mood stabiliser) and blood pressure medication may also negatively interact with iodine. If you take these medications regularly, we recommend choosing an iodine-free multi.
Though marketed for the over 70s, Multi-Max® 70+ is an iodine-free formula with great overall nutritional coverage, making it an excellent choice for anyone who wants to avoid supplemental iodine.
Want to learn more? Drop a line to one of our expert Nutrition Advisors, who are always happy to offer free, confidential advice.
Aside from an iodine-free multivitamin formula, you may also consider taking an iron-free multi. You can read more in this article.


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Disclaimer: The information presented by Nature's Best is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications.

Our Author - Keri Filtness


Keri Filtness has worked in the Nutrition Industry for 19 years. She is regularly called upon for her professional comments on health and nutrition related news. Her opinions have been featured by BBC3, Prima, Vitality, The Mirror, Woman’s Own and Cycling Weekly, amongst others. She has also worked one to one with journalists, analysing their diets and health concerns and recommending changes and additions, where appropriate.

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