Hypothyroidism is the condition where the thyroid glands aren’t producing enough hormones needed by the body to fully function. As a result, the metabolism slows down. It’s easy to connect this disorder with a ketogenic diet, because of the limiting of the food intake.
However, a low-carb diet doesn’t play a huge role that leads to this problem. Instead, it’s the low calorie intake. Cutting on calorie puts a lot of stress on the endocrine system, and one factor is not getting enough nutrients. Slow metabolism causes nutrient deficiency and this can definitely trigger a lot of physiological disorders all throughout.
To keep the thyroid healthy in a ketogenic diet and prevent the onset of hypothyroidism, it’s best to start taking in minerals like sea kelp's iodine and selenium.
Furthermore, when going on a low-calorie diet, don’t cut too much on calories as it would deprive your body of essential minerals.