Chi Gung can definitely do much to rejuvenate the body despite what our Yogic buddies might think. Yoga and Chi Gung are based on entirely different principles after all. The philosophy, purpose, and the way energy flows in Taoist and Yogic exercises is very different, they come from different countries and although there has been some cross over it would be wrong to relate the two activities together.
The strength and condition of the hair is significantly related to the condition of the Kidneys for example in TCM so deep breathing can do a great deal to massage these organs and make them much more efficient. The kidneys control growth and reproduction and so they are related to the ageing process.
Hair loss in Chinese medicine is often attributed to the rise of heat in the body into the head but is also related to stress. Chi Gung can help here too by keeping the heating and cooling energies flowing around the body and helping you to relax therefore allowing the rejuvenation process to work.
The eyes are more closely related to the liver so in any of these cases if you do Chi Gung exercises or more properly Medical Chi gung related to these organs then the corresponding part of the body will also benefit.
In general hair loss, teeth, and poor eyesight are connected with the amount of Jing or essence the body has stored and can process to aid rejuvenation. If you have lived a rock and roll lifestyle and taken drugs, alcohol or smoked then your Jing will be weaker, also the same is true if you 'overthink' or get stressed out easily, you will simply burn up more of your precious essences. Obviously good diet is also important and if you eat too much sugar then sure you can kiss goodbye to your teeth before too long.
If you live your life according to Taoist principles this is probably just as important as following a Chi Gung routine, after all an ounce of prevention is worth a pound of cure now isn't it?
