Title: The Link Between Thyroid Hormones and Weight
Headings: The Relationship Between Thyroid Hormones, Metabolism, and Weight
The Relationship Between Thyroid Hormones, Metabolism, and Weight
How the Thyroid Gland Works
The Role of Metabolism
The Role of Thyroid Hormones
Research
Hypothyroidism and Weight
Weight Loss With Treatment
The More Medication Myth
Hyperthyroidism and Weight
The Weight Loss Challenge
Low T3 Levels
Hormone Resistance
Leptin Resistance
Insulin Resistance
A Word From Verywell

Content: While synthetic thyroid hormones have been used this way in the past, research has shown that most people gain all the weight back once they stop using them. 5 ﻿ Worse, being on thyroid hormones unnecessarily can result in serious side effects. For people who are already using levothyroxine, increasing the dose above what's needed can lead to more weight loss, but it's usually not significant and those pounds are often gained back once the dose is decreased again. This is also an unhealthy way to lose weight as an increased dose is also associated with adverse reactions, including heart issues, insomnia, headaches, menstrual irregularities and skin rash. 6 ﻿
Are You Taking Too Much Thyroid Medication? Hyperthyroidism and Weight
Many patients with an overactive thyroid end up losing weight. And in general, the more severe the hyperthyroidism, the more weight that is lost. 5 ﻿ But because metabolisms in these individuals are working harder and faster, they often feel hungrier and some may gain weight instead. This usually reverses once your hyperthyroidism is treated. You may find that you gain back all the weight you lost, which is totally normal.