Testosterone is a hormone that is thought of as the male hormone. But as men have estrogen, women also have a small amount of testosterone. Men have around ten times the amount of testosterone than women.

Although testosterone plays an important function in the development of a fetus, it's effects become apparent during puberty. That when you start seeing the physical changes that mean you are becoming an adult.

• Adult-type body odour
• Increased oiliness of skin and hair
• Pubic and axillary hair
• Growth spurts

In Chinese medicine testosterone would be Yang. Yang is represented as the dark fish image of the Yin/Yang symbol. But you can see that there is a light eye showing that there is always Yin in Yang and Yang in Yin. It is very amazing that the ancient Chinese physician knew of the balance of hormones within men and women long before western medicine described the effect of hormones.

Yang energy is vibrant and is represented by the sun, whereas yin is dark and is represented by the moon. Once again these vital energies need to be in balance to have perfect health.