Which gland is most associated with hair growth?

The gland that is most associated with hair growth is the adrenal gland. The adrenal glands produce a variety of hormones, including androgens such as testosterone and dehydroepiandrosterone (DHEA). These androgens play a crucial role in the development of secondary sexual characteristics, including hair growth in both males and females.

While the hypothalamus and pituitary glands also influence hair growth indirectly through the regulation of hormones, they do so by controlling the secretion of other hormones rather than directly promoting hair growth themselves. The thyroid gland is primarily involved in regulating metabolism and energy levels and does not have a direct role in stimulating hair follicles as strongly as the adrenal glands do. Therefore, the adrenal glands are the key players in the hormonal regulation of hair growth.