I blame my weight gain and inability to lose fat on low thyroid hormone levels. How much of an impact does this have?
Some. T3 levels have an impact on one’s metabolic rate. The body uses this hormone to help increase or decrease metabolism, often in response to caloric excess or restriction. If one has a low thyroid hormone status, it can lower their total metabolic rate. Lower thyroid levels can be an inconvenience, but it is important to realize that you will still lose weight when caloric intake is less than expenditure.