Hello and welcome – The weight issue is very individual. You will find patients on this board who did *not* gain weight with RAI…and others who have struggled with weight issues. I am on anti-thyroid drugs, and I have been in a constant battle to keep my weight down ever since I was diagnosed 6 years ago. The best thing you can do for yourself is to focus on whole, unprocessed, nutrient-dense foods. A food journal might be helpful as well to track your intake from day to day.
However, I think the bigger issue is making sure that RAI is the right treatment option for YOU. A great place to start researching is the two links in the “Treatment Options” thread in the announcements section at the top of this forum. They go through *all* three treatment options for hyperthyroidism (anti-thyroid drugs, radioactive iodine, and surgery), including info on the risks and benefits of each.
We have many members here who are success stories with RAI, but it’s important to fully understand the risks and benefits before going through with treatment.