Iodine is a mineral that the body requires for the production of the thyroid hormones that regulate the thyroid and are crucial for maintaining good energy levels.

Across the world, iodine deficiency is common but is less so in the UK. Signs of an iodine deficiency include an underactive thyroid and extreme tiredness and a lack of energy.

Iodine also protects against the development of a goitre, a painful lump that can form on the thyroid gland and become visible in the neck. It’s also naturally antiseptic and can help to protect against the toxic effects of exposure to radiation.

The best food sources for iodine include seafood and seaweed. Vegetarians and vegans are at risk of an iodine deficiency and should consider a supplement if they don’t consume much seaweed. There are also brands of table salt available that are fortified with iodine.