The thyroid is a tiny gland with the important function of regulating metabolism and energy levels. According to Dr. James Norman, as many as 10 million Americans may suffer from a condition called hypothyroidism, characterized by sluggish thyroid activity. Hypothyroid symptoms vary among individuals, but tend to include weight gain, fatigue and hair loss. A natural diet that improves hypothyroidism works by either supporting thyroid function or by limiting foods that interfere with thyroid activity.
L-Tyrosine
L-Tyrosine is an amino acid instrumental in synthesizing the thyroid hormone that regulates a range of bodily functions, from energy levels to sexual function. Consuming foods high in tyrosine may help to support the body's capacity to synthesize this important hormone. The seaweed spirulina is extremely high in tyrosine. Eggs, cheese and meats contain significant amounts as well.
Vitamins and Minerals
A range of vitamins and minerals is also instrumental for maintaining thyroid functions. According to the Environmental Illness Resource, iodine, in particular, is an essential building block in thyroid hormones. Sea vegetables such as nori and arame are especially high in iodine, as are yogurt, eggs and strawberries. A natural thyroid diet should also contain foods high in zinc and iron such as red meat and beans, and foods containing vitamin E and vitamin C, such as leafy green vegetables.
Omega-3 Fatty Acids
Omega-3 fatty acids help thyroid hormones bond to receptors, so consuming these healthy fats in sufficient quantities helps to naturally support thyroid function. Foods high in omega-3 fatty acids include coldwater fish such as salmon, mackerel and albacore. Flaxseed and some nuts such as walnuts are also high in omega-3 fatty acids. The leafy green vegetable purslane is also especially high in this vital nutrient.
Avoiding Brassicas
According to the University of Maryland Medical Center, vegetables in the brassica family can interfere with thyroid function. This is not an issue for people with normal thyroid function, but if you suffer from hypothyroidism, you should avoid these foods whenever possible. They include broccoli, cauliflower, Brussels sprouts, kale, mustard greens and rutabagas. They are most harmful when consumed raw, in dishes such as cole slaw.
Avoiding Soy Foods
Soy foods can also be detrimental to thyroid function because they contain compounds called isoflavones, which inhibit the production of thyroid hormones. Soy foods include tofu, tempeh and miso. They are also the main ingredients in many processed meat substitutes such as soy sausages. In addition, soy is a common ingredient in many processed foods, adding cheap protein. Check the labels of the products you buy to avoid unwittingly buying items that contain soy.
