Such a condition can likely result from the ingestion of an over the counter supplement called DHEA, or a similar "safer" one called 7-keto DHEA. I also was 26 when I started taking 7-keto for athletic performance. Several months later I developed several problems including the right side of my thyroid's being enlarged. Also I have other unpleasant side effects. I am now 27 and had my thyroid ultrasound done recently. Supplements like DHEA are dangerous , especially for young people. Its like taking steroids except is messes with the thyroid. If you want to get in touch , send me a message and ill give you my contact info
In agreement with taking the supplement DHEA 7 keto - also other wieght building and preformace products can cause endocrine issues.
Taking T3 hormone, adding in testosterone builders etc.