I have taken Nature-throid for years, but it is on backorder, and my last refill was with WP Thyroid which is made by RLC labs, and so is Nature-Throid made by RLC. I can't say that I am satisfied with the results of WP Thyroid. I have read that both of them, the new "reformulated" versions, are disappointing, less effective, and with unwanted side effects. Both have been on backorder and will take a while to be available at pharmacies again. My pharmacist suggested talking to my doctor about writing me a prescription for NP Thyroid. It is cheaper and she said this would be a good time to try it and compare it to the other two which I have taken. Has anyone had a good experience with NP Thyroid? Do you have more or less side effects with it?