Nine years ago I underwent surgery for a thyroidectomy. After this operation I had to take one Eltroxin tablet per day, as a supplement in order to replace the hormone thyroxin. This tablet was taken for eight years. I began practising the Sudarshan Kriya regularly. Within six months I went for regular Thyroid function tests. My doctor discovered that there was no longer any need to take Eltroxin as the tests were completely normal.