The best way to fully comprehend what free radicals are is to look at them from a cellular level in that the human body is made up of all kinds of cells.
The chemical bond of a cell is comprised of various types of molecules that are held together with one or more atom.
Atoms are comprised of protons, neutrons, and electrons whereby the total amount of protons that are in the nucleus determine how many electrons will surround them.
The role of the electrons is to manage chemical reactions that occur inside the atom as well as the substances that makes the atoms form molecules. Much like planets, electrons revolve around the atom in one or more shells.
When the innermost shell has two electrons, it is considered full. When the second shell is full with electrons the process starts all over again.
The number of electrons in an atom’s outer shell id the most important structural characteristic.
A substance that has a full outer shell tends not to enter in chemical reactions. Ultimately, atoms seek to reach a state of maximum stability, an atom will try to fill its outer shell by:
Picking up or dropping electrons that will either occupy or leave the outer shell
Bonding with other atoms to share electrons to complete the outer shell
The typical way an atom achieves maximum stability is sharing electrons with other atoms. This allows the conditions to for the atoms sustain the molecules in the most efficient way.
Often, the bonds that the atoms form remain in tact so that maximum stability is maintained. However, when these bonds do tear, the highly unstable free radical is born and swiftly seeks to make itself more stable.
Free radicals like to attack by locating the closest cell that has maximum stability and begins to steal electrons. Eventually these attacked molecules become free radicals themselves. The process will continue until eventually cellular damage occurs.
Common times when free radicals occur are during metabolism as well as when the body is fighting off bacteria or viruses. Pollution, cigarette smoke, radiation, and pesticides are other times when free radicals can occur.
The body is usually able to fight off free radicals unless it’s empty of antioxidants or free radicals production accumulates too much, damage can occur. The older you get the more free radical damage occurs.
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