Which weight loss supplement is linked to goiter and hypothyroidism?

The correct choice, glucosinolate, is linked to goiter and hypothyroidism because it is a naturally occurring compound found in cruciferous vegetables such as broccoli, kale, and cabbage. Glucosinolates can influence thyroid function due to their ability to interfere with iodine uptake, which is crucial for the production of thyroid hormones. When iodine is not adequately absorbed, this can lead to an underactive thyroid (hypothyroidism), as well as the development of goiter, an enlargement of the thyroid gland that occurs in response to hormone deficiency.

In contrast, the other options do not have a direct link to these specific thyroid conditions. Green tea extract is rich in antioxidants and has various health benefits but is not associated with thyroid dysfunction. Yerba mate, commonly consumed as a tea, does not exhibit the same negative impact on thyroid function and is not known to cause hypothyroidism or goiter. Conjugated linoleic acid is a fatty acid found in meat and dairy products and is often marketed for weight loss; however, it has no established connection to thyroid issues. Understanding the role of different supplements and their potential effects can help in making informed decisions regarding weight management and thyroid health.