Your thyroid gland represents one of several endocrine--or hormone-producing--glands in your body. Located at the front and sides of your throat, your thyroid gland secretes thyroid hormones into your bloodstream, so they can travel throughout your body and interact with your tissues. Hypothyroidism develops when your thyroid gland cannot produce sufficient thyroid hormone. Deficiencies in vitamin A can affect thyroid function, and might increase your risk of hypothyroidism.
Thyroid Function and Nutrients
Your thyroid produces and secretes thyroid hormones, T-3 and T-4. These hormones affect a variety of tissues, helping to guide tissue growth, support your body's metabolism and help control processes like body temperature regulation. Your thyroid gland relies on a number of nutrients to produce thyroid hormones, including the essential mineral iodine. Failure to consume enough iodine leads to iodine deficiency, which can reduce the activity of your thyroid gland. In addition, other nutrient deficiencies, including selenium deficiency, can negatively affect your thyroid.
Effect of Vitamin A
Your vitamin A levels can have an effect on your thyroid function. Deficiencies in vitamin A can worsen the effect of an iodine deficiency, contributing to thyroid gland dysfunction. As a result, a deficiency in vitamin A can contribute to nutrient deficiency-related hypothyroid functioning. Vitamin A also plays a role in thyroid hormone functioning, working together to control gene activation tissues throughout your body. Deficiencies in vitamin A might therefore prevent proper thyroid hormone functioning, further contributing to hypothyroidism.
Signs of Hypothyroidism
Under-activation of the thyroid as a result of vitamin A and other nutrient deficiencies can cause a number of adverse health effects. Individuals with low thyroid hormone levels might feel cold, develop weak nails and brittle hair, suffer from depression and feel fatigued and weak. In addition, hypothyroidism can cause unexplained weight gain, since the lack of thyroid hormone slows down your metabolism. Left untreated, low thyroid hormone levels can affect your ability to smell, taste and speak.
Considerations
Consuming enough vitamin A, as well as other nutrients such as iodine and selenium, can help prevent nutrient deficiency-related hypothyroidism. Following a healthy diet that includes iodized salt often provides you with the nutrients required for proper thyroid function, and dietary supplements can further boost your nutrient intake. However, if you develop symptoms of hypothyroidism, never try to treat the condition with vitamin supplements, since not all cases of hypothyroidism develop due to nutrient deficiencies. Seek medical attention to assess your thyroid hormone and nutrient levels, and to determine the best course of treatment to restore your thyroid function.
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