The medical effects of hydrogen were discovered only recently, specifically by Japanese researchers in 2007.To put it more strictly, it has been 45 years since scientists in the United States demonstrated the efficacy of high-pressure hydrogen in treating skin cancer since 1975, so the discovery of the medical effects of hydrogen is not new.Perhaps a more accurate expression of the question is why the medical effects of small doses of hydrogen have only recently been discovered.

The real meaning behind this question is why, with so many smart scientists and hydrogen being a relatively important and well-studied gas, no one has discovered the medical effects.So this is another way of saying whether or not the medical effects of hydrogen are real.

The real meaning behind this question is why, with so many smart scientists and hydrogen being a relatively important and well-studied gas, no one has discovered the medical effects.So this is another way of saying whether or not the medical effects of hydrogen are real.

Although the research on the treatment of cancer by high-pressure hydrogen in 1975 was essentially a medical action of hydrogen, the high-pressure hydrogen conditions required for such action were not acceptable for clinical application, and were not only difficult to operate, but also very dangerous.Therefore, this research is not only not conducive to the discovery of the medical effect of hydrogen, but also may have a negative effect on the subsequent research. Since it has no application value, high requirements for research conditions and great risks, such research is not interesting for research.

Hydrogen is a typical biological gas, and its low status in higher biological systems may be a reason for its neglect.To say that a substance is a biomolecule is based on the fact that the substance is made by living things and has a certain effect on living things.A wide variety of metabolites are also typical biomolecules.For example, a variety of organic matter, such as protein, nucleic acid, sugar, small peptide, amino acid, nucleotide, a variety of organic acid, biological molecules produced in the body is a very large group.Metabolomics is a tool for studying metabolic molecules.The use of omics also shows the complexity of metabolites, it is difficult to fully analyze the functions of individual molecules, and there are still a large number of biomolecules whose functions are not understood.Although hydrogen has been studied in depth, due to its small molecular volume and strong diffusion ability, it is difficult to ensure accurate analysis by general research methods. Without special research, even identification and analysis are difficult.This is also seen in other biogas molecules, such as nitric oxide, which was first identified as "a substance from vascular endothelial cells that dilates vasoactivity", and which was traced to be the basis for this effect many years later.The research on carbon monoxide and hydrogen sulfide is mainly based on the research on nitric oxide.These biomolecules are also relatively recent, and these gases are relatively easy to find than hydrogen.One is that these classical gas molecules have strong physiological functions, such as nitric oxide, which is the basic regulator of blood pressure, immunity and nervous system functions. Normal physiological functions cannot be separated from the presence of these molecules.Many bacteria can make hydrogen, and some can use it.Hydrogen is also a typical biological gas, at least at the bacterial level.But hydrogen's biological status falls short of that of a biological gas, at least for the time being.So one of the big reasons why it's been neglected for so long is that hydrogen biology is a low priority.

Hydrogen is a typical biological gas, and its low status in higher biological systems may be a reason for its neglect.To say that a substance is a biomolecule is based on the fact that the substance is made by living things and has a certain effect on living things.A wide variety of metabolites are also typical biomolecules.For example, a variety of organic matter, such as protein, nucleic acid, sugar, small peptide, amino acid, nucleotide, a variety of organic acid, biological molecules produced in the body is a very large group.Metabolomics is a tool for studying metabolic molecules.The use of omics also shows the complexity of metabolites, it is difficult to fully analyze the functions of individual molecules, and there are still a large number of biomolecules whose functions are not understood.Although hydrogen has been studied in depth, due to its small molecular volume and strong diffusion ability, it is difficult to ensure accurate analysis by general research methods. Without special research, even identification and analysis are difficult.This is also seen in other biogas molecules, such as nitric oxide, which was first identified as "a substance from vascular endothelial cells that dilates vasoactivity", and which was traced to be the basis for this effect many years later.The research on carbon monoxide and hydrogen sulfide is mainly based on the research on nitric oxide.These biomolecules are also relatively recent, and these gases are relatively easy to find than hydrogen.One is that these classical gas molecules have strong physiological functions, such as nitric oxide, which is the basic regulator of blood pressure, immunity and nervous system functions. Normal physiological functions cannot be separated from the presence of these molecules.Many bacteria can make hydrogen, and some can use it.Hydrogen is also a typical biological gas, at least at the bacterial level.But hydrogen's biological status falls short of that of a biological gas, at least for the time being.So one of the big reasons why it's been neglected for so long is that hydrogen biology is a low priority.