What hormone increases hair growth?

Androgen hormones, such as DHEA and testosterone, significantly influence hair growth.

While it's commonly thought that only one hormone directly causes hair growth, it's more accurate to say that a group of hormones, particularly androgens, play a substantial role. According to the provided reference, when androgen levels are too high, this can lead to excess hair growth, especially on the body and face.

Understanding Androgens and Hair Growth

Androgens are often referred to as "male" hormones, although they are present in both males and females. Key androgens include:

• DHEA (Dehydroepiandrosterone): A precursor hormone that the body can convert into other hormones, including testosterone.
• Testosterone: A primary sex hormone that plays a crucial role in the development of male characteristics and also influences hair growth.

How Androgens Affect Hair Growth

Androgens can affect hair follicles differently depending on the location on the body and individual genetics.

• Stimulation of Hair Growth: In certain areas, such as the face and body, androgens can stimulate hair follicles, leading to increased hair growth. This is often seen in men with the development of facial hair and body hair. In women, increased androgen levels can cause hirsutism, which is the growth of excessive hair in a male-like pattern.
• Inhibition of Hair Growth: Paradoxically, in the scalp, androgens like DHT (dihydrotestosterone), which is derived from testosterone, can contribute to hair loss, such as in male and female pattern baldness.

Summary Table: Androgens and Hair Growth