Hi, I'm 57, got primary Sjogren's Syndrome, asthma and sleep apnoea. I am hypothyroid and have been on 100 mg Eutroxsig (T4 synthetic) since 2005. I find it almost impossible to lose weight, even when I eat sensibly and exercise like mad. Have a huge intolerance to heat, and suffer every summer in the Australian climate. I've been looking at trying Thyroid S in place of the Eutroxsig. Today I bought 1000 60mg tabs online from Thailand. What a faff that was - took about two hours to do, what with having to register with an international payments company and emailing/texting the contact in Thailand. Hope they arrive and fingers crossed they'll help me feel better.