Can synthetic pheromones cause low thyroid levels or cancer?

Many breast cancers are sensitive to hormones like estrogen, and according to researchers, thyroid hormone has estrogen-like effects at high levels. So, for years ... Hypothyroidism, or an underactive thyroid develops when the thyroid gland does not produce enough thyroid hormone. read more

The study found a 200% (not a 50%) increase risk of breast cancer in women who took thyroid hormone for at least 15 years as compared to women who did not take thyroid hormone. You read that correctly: a 200% increase risk of breast cancer in women who took thyroid hormone as compared to women who did not take thyroid hormone. read more

The result can be cancer. In women with low levels of thyroxin, there seems less cellular attack by oestradiol, and less cancer. A hormone made in the pituitary gland directly stimulates the thyroid to produce thyroxin. (This hormone, unsurprisingly, is called thyroid stimulating hormone or TSH). read more

In the more rare case of hypothyroidism due to pituitary failure, the thyroid hormone T4 will be low, but the TSH level will also be low. The thyroid is behaving "appropriately" under these conditions because it can only make hormone in response to TSH signals from the pituitary. read more