The Chinese biological clock is also known as Body energy clock. It shows the flow of energy throughout the body. During a 24 hour period the energy moves in two-hour intervals through the body organs. If some organ is not functioning properly the symptoms are noticeable. Human body is actually a system of energy which in Chinese medicine is known as meridian system. This system represents the energy flow throughout the body similar to the blood flowing throughout the blood vessels. This system affects the whole body as well as the substance exchange. Meridian network is divided in 12 meridians each affecting particular major organ as stomach, spleen, small intestines, lungs, large intestines, heart area, duodenum, bladder, liver and duodenum. These meridians are also called Principal Meridiansand are divided into Yin and Yang groups.The yin meridians are: lungs, spleen, kidney, liver and heart area. These organs gather, store and process the energy and substances. The yang meridians are: stomach, bladder, colon, small intestine, gallbladder, duodenum and the colon. These meridians work within 24 hours and are divided in two hour intervals. Every meridian reaches its peak when the opposite one reaches its lowest point. The first thing that the Chinese doctor will ask you is what time of the day did you feel bad. By asking that he would find out where the problem was and where the energy flow was at that particular time. You can help yourself by making notes about your biological clock and when the symptoms occurred during the day. Also write down when do you feel the most energetic and also pay attention to what time of the night you wake up usually because that also can indicate that some body part is not functioning properly. Time of maximum function 1 – 3 AM – liver (detoxification, muscles and eyes) 3 AM – 5 AM – lungs (skin) 5 AM – 7 AM – colon (assimilation, elimination, skin) 7 AM – 9 AM- stomach (lymph, food digestion) 9 AM – 11 AM – spleen, pancreas (lymph, food digestion) 11 AM – 1 PM – heart (artery blood circulation) 1 PM – 3 PM – small intestine (digestion, assimilation, arteries) 3 PM – 5 PM – bladder (bones, teeth, elimination, cleaning) 5 PM – 7 PM – kidneys (bones, teeth, ears, filtration, elimination) 7 PM – 9 PM – cardiac layer (constriction of blood vessels) 9 PM – 11 PM – duodenum (thermoregulation) 11 PM – 1 AM – gallbladder (digestion, muscles, eyes) Time of minimal functions or rest 1 AM – 3 AM – small intestine (digestion, assimilation of the arteries) 3 AM -5 AM – bladder (bones, teeth, cleaning elimination) 5 AM – 7 AM – kidney disease (bones, teeth, ears, filtration, elimination) 7 AM – 9 AM – the heart layer (constriction of blood vessels) 9 AM – 11 AM – duodenum (thermoregulation) 11 AM – 1 PM – gallbladder (digestion, muscles, eyes) 1 PM – 3 PM – liver (detoxification, muscles and eyes) 3 PM – 5 PM – lungs (skin) 5 PM – 7 PM – colon (assimilation, elimination, skin) 7 PM – 9 PM – stomach (lymph, food and digestion) 9 PM – 11 PM – spleen, pancreas (lymph, food digestion) 11 PM – 1 AM – heart (artery blood circulation) We have already mentioned above that when one meridian organ has highest energy the opposite organ has the lowest energy level. Liver for example has its highest energy between 1 and 3 Am and at the same time the opposite organ- small intestine has its lowest energy. That is why when you eat later in the evening and immediately go to bed, the small intestine is not able to absorb the food properly so you should avoid doing certain things when the organ included in that activity is at its lowest energy level. When the organs are the most active their functions are boosted. In time of illness if the organ is burdened with excess energy, symptoms will appear and then you need to reduce the excess energy. If the organ doesn’t work properly it should be repaired. Natural medicine has numerous remedies which can boost your energy as homeopathy, acupuncture and many others. Source: