The enormous amount of activity that occurs inside each of the approximately one hundred trillion human cells is shown by the fact that at any instant each cell contains about one billion ATP molecules. This amount is sufficient for that cell’s needs for only a few minutes and must be rapidly recycled. Given a hundred trillion cells in the average person, about 1023 or one sextillion ATP molecules normally exist in the body. For each ATP “the terminal phosphate is added and removed 3 times each minute” (Kornberg, 1989).

Well now I know why I'm tired!

My wife at one time had a problem with these ATP's misfiring in her system and the associated calcium and ATP pumps. So she is generating ATP's and are not being used, generating plenty of lactic acid at the same time, shortcircuiting functions of her muscles getting very weak and tired. It was very painful, and it is called fibromyalgia.

She is okay now, it attacks every now and then. Excercise helped a lot, and low carbohydrate diet, but she is very fit to start with. The incident started when she was involved in a car accident as a passenger. A couple of months from that incident she had fibromyalgia and was advised to take some anti-depressant drugs which made it worse. So we went looking for alternative approaches and the low carbohydrate diet and regular excercise (15-minute brisk walk) helped a lot.

Even with some anomalies, we can really say that each person is special, astounding combinatorial sequences of our cellular bodies, the real miracle is that they work beautifully together.

Even though there is a total of sextilion ATP molecules in the human body, the content of ATP is only about 50 grams, which must be constantly recycled every day. The ultimate source of energy for constructing ATP is the food we eat. ATP is simply the carrier and regulation-storage unit of energy. The average daily intake of 2,500 food calories translates into a turnover of a whopping 180 kg (400 lbs) of ATP. So every day each person's body gains 400-lbs., which iturns around and s almost totally used up as energy. Citrus trees also contain ATP (adenosine triphosphate) - Millet