The thing called spice in the movie Dune has health benefits. For example, it helps you live longer. However, this substance is quite addictive. Whoever controls the sale of this spice inevitably controls every other faction in the movie universe.
This may have historical parallels in the real world. Science writer Dr. In her 2008 book Science of Dune, Carol Hart noted that in pre-Columbian America, coca leaves, like melange, were used primarily by the noble and priestly classes of the ancient Incas. The ruling classes maintained their power partly through a monopoly on coca leaves.
Spice also has the ability to alter human consciousness. Even moderate exposure to the spice will turn the entire eye dark blue (as seen among the Fremen of Arrakis due to repeated exposure to the substance). This is probably no different from the constant dilation of pupils that accompanies recreational drug use in the real world.
Nowadays, there are also nootropics, or “smart pills”, taken by those seeking mental superiority. Manufacturers of these drugs claim that they can improve cognitive functions such as memory, attention, creativity and motivation. Nootropics are sometimes prescribed to treat ADHD and dementia. However, you should not buy them without a prescription. A 2020 study from Harvard Medical School in Boston, Massachusetts, found that they may contain substances not yet approved for medical use. Study author Dr. “Taking these supplements poses potentially serious health risks,” said Peter Cohen.
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Source: Ferra

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