Non-goitrogenic foods are those that do not exacerbate the condition of goitre, which is a symptom of a thyroid gland that is not functioning properly. Goitrogenic foods primarily come in the form of soy products and cruciferous vegetables such as broccoli, cauliflower, cabbage and kale, especially in their uncooked forms. Most other foods are non-goitrogenic, but some foods actually have vitamins and minerals that can enhance thyroid function.
Foods high in Tyrosine
L-tyrosine is an amino acid that is instrumental to thyroid function. Foods high in tyrosine include eggs and nuts, as well as avocados, bananas, oats, beans and pumpkin seeds. Dairy products, meat and fish are also excellent sources of tyrosine. Soya bean products and cruciferous vegetables, which inhibit thyroid function, also tend to be high in tyrosine, but people looking to improve thyroid function by changing their diet should consume these foods in moderation, if at all, because of their other goitrogenic properties.
Foods High in B Vitamins
B vitamins, especially vitamin B12, are also non-goitrogenic and help to support thyroid function. Nuts, which are also high in tyrosine, are rich in B vitamins as well. Whole grains are excellent sources of B vitamins, so substitute whole wheat bread for white bread and brown rice for white rice. Eat oats, barley and bran as well. Brewer's yeast, a by-product of beer manufacturing available in natural food stores, contains plenty of B vitamins, as do lentils and molasses.
Foods Containing Iodine
Iodine is instrumental in supporting thyroid function, so foods containing iodine are non-goitrogenic and should be included in a diet aimed at correcting hypothyroidism. Seaweeds such as nori, hijki, dulse and arame are rich in iodine. Nori is an important ingredient in sushi, which also features fish, another non-goitrogenic food. Dulse makes excellent soup stocks, and hijiki and arame are excellent in raw vegetable salads. Raisins are high in iodine as well. Make sure that you use iodised salt, which has played an important role of lowering the incidence of goitre since it was introduced.