Vitiligo is highly associated with a number of other autoimmune diseases, mostly thyroid disease, but also autoimmune pernicious anaemia, rheumatoid arthritis, psoriasis, lupus, Addison's disease, and adult-onset autoimmune diabetes.
"Elevated thyroid antibodies are often associated with chronic urticaria, also called hives. Studies report that as many as 57.4% of patients with hives have the presence of anti-thyroid antibodies. An August 2010 paper suggests that treatment with T4 improves the itching associated with urticaria, but did not advise treatment with T4 unless the patient was hypothyroid." - excerpt from Life Extention - Thyroid Regulation
One of the many human trials on selenium lowering TPOAb:
Turkey - 2006 Journal of Endocrinology. This study showed a 30% decrease in anti-thyroid antibodies after 3 months of 200mcg per day of L-selenomethionine supplementation for in women with Hashimotos Thyroiditis. The starting average TPOAb was 803 and after 3 months the average was 572.
Ancedotal evidence - Gluten free diet lowers TgAb antibodies.
http://www.medhelp.org/posts/Thyroid-Disorders/Gluten-Free-Diet-Lowers-TgAb-but-not-TPOab/show/1003484
Deficiency states commonly found to be low in thyroid patients include vitamin D, vitamin B12, and magnesium.
The University of Nebraska Medical Center research study has determined that patients with chronic hives may benefit by supplementing with vitamin D. The researchers found patients with chronic hives had significantly reduced levels of vitamin D, with nearly half of them considered to be vitamin D deficient. Try 1,000 to 2,000 international units (IUs) daily. The vitamin D council state optimal vitamin D levels - 80ng/mL or 200nmol/L.
"Migraine often occurs as a result of low brain levels of magnesium - most migraine patients are found to have low brain magnesium levels during migraine attacks. One clinical trial found that supplemental magnesium caused the complete elimination of migraine pain within 15 minutes in 80% of migraine sufferers and more than half of these migraine sufferers were still free of symptoms 24 hours later." Magnesium symptoms are numerous but includes eye twitching, muscle cramps, restless leg syndrome, and seizures. RBC magnesium may pick up a deficiency state although no blood test is accurate as only 1% of magnesium is in the blood
Vitamin B12 deficiency - chronic fatigue is the number one symptom. Can cause myclonic jerks or myclonic seizures if levels are low enough. In a recently study, 25 of the 40 patients with chronic unexplained cough had a deficiency of vitamin B12 (serum levels 300 pg/ml). Optimal B12 serum is over 800pg/mL or 600pmol/L