Do people need nitrogen from air for health?
No, humans do not directly need nitrogen from the air for their health. While nitrogen is one of the essential elements for life, it is primarily obtained from the food we consume rather than from the air we breathe.
Nitrogen gas (N2) makes up about 78% of the Earth’s atmosphere, but the nitrogen in this form is not readily available or usable by most organisms, including humans. Instead, the nitrogen gas must be converted into other forms before it can be incorporated into living organisms
Plants play a crucial role in this process through a biological process called nitrogen fixation. Certain types of bacteria, either living symbiotically within the roots of leguminous plants (such as soybeans and peas) or freely in the soil, convert atmospheric nitrogen into a form called ammonia (NH3). Ammonia can then be further converted into nitrites (NO2-) and nitrates (NO3-), which are the forms of nitrogen that plants can take up through their roots
When humans consume plants or animals that have incorporated these nitrogen compounds into their tissues, our bodies can break down these compounds into individual amino acids. Amino acids are the building blocks of proteins, which are essential for the growth, repair, and functioning of our cells
Therefore, while nitrogen is necessary for the human body to build proteins and perform various physiological functions, we do not directly rely on atmospheric nitrogen for our health. Instead, we require nitrogen compounds that have been processed by plants and converted into forms that can be utilized by our bodies
It is worth noting that air does play a crucial role in providing oxygen, which is essential for human survival. Oxygen is necessary for respiration and energy production within our cells. While nitrogen is not directly utilized by our bodies, it still serves important ecological functions, particularly in the nitrogen cycle, which is crucial for maintaining balanced ecosystems
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