Creatine, in biochemistry, is a nitrogen-containing organic acid that naturally exists in the bodies of vertebrates and can assist in providing energy to muscles and nerve cells.
What exactly does creatine do?
To understand this matter, one must first clarify what creatine actually does at the cellular level.
All the activities of the human body, whether it's running, thinking, concentrating or forming memories, are all consuming the same thing: ATP, which is the energy currency of the cells.
However, ATP has a problem: its storage in cells is extremely limited, only sufficient to meet the needs for a few seconds. This means that cells must continuously regenerate ATP in order to maintain normal function.
The human body has a backup system for this purpose, called the phosphocreatine system. Its logic is quite simple: when cells suddenly require a large amount of energy, phosphocreatine can quickly convert ADP back into ATP, quickly filling the energy gap.
And creatine is the core ingredient of this emergency system.
the brain requires this system more than the muscles do
The emergency battery function of creatine is quite understandable when it comes to the muscles. During intense exercise, the muscles require explosive energy, and the creatine system comes into play at this time.
But the problem is that the brain is also extensively using this system, and in a sense, the demand might be even more urgent.
This ratio alone speaks volumes - the brain is an extremely energy-consuming organ.
More importantly, neurons are almost incapable of storing energy. Muscle cells can store glycogen, fat cells can store fat, but neurons can basically only produce and use energy immediately. They have very little stock to draw upon.
This means that the brain has extremely high requirements for the stability of energy supply. Once there is a fluctuation in energy supply, the first things to be affected are not your hands and feet, but your concentration, memory, emotional state and thinking efficiency.
Have you ever experienced this feeling: after intense mental exertion, your brain starts to slow down, your mood becomes very bad, and you lose interest in everything? Part of the reason for this is that the energy system of neurons is under pressure.
The creatine system, on the other hand, provides a rapid energy buffering mechanism. There is an enzyme called creatine kinase in neurons, which is responsible for rapidly regenerating ATP from phosphocreatine. That is to say, when neurons suddenly require a large amount of energy, the creatine system can respond quickly and fill the gap before the formal energy production process can catch up.
Summary
The true function of creatine is not to build muscles.
Its essence lies in maintaining the energy stability of cells.
Among all the organs in the human body, the one that relies most on energy stability is the brain.
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