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It is known that the Moon causes tides. Given that the human body is 60%-70% water, is there any research that shows that the tides affect humans in any tangible way?

If this is not the appropriate place to ask, then please let me know a more appropriate place to ask?

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    $\begingroup$ Human bodies are too small to experience much tidal effect from the Moon. This answer explains how tides work, but it might be a bit too technical for your needs. $\endgroup$ – PM 2Ring May 10 '19 at 8:28
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The gravitational attraction between two masses $m_1$, $m_2$ with distance $r$ can be calculated by $$F_G = G \frac{m_1 m_2}{r^2},$$ where $G$ is the gravitational constant. The average distance of the moon to earth is around $r^\prime=384402 km$ but because we are at the surface of the earth, we will gladly substract $6400km$ from it. Assuming you have a mass of $m_1=80kg$ and the moon's mass is $m_2=7.342 \cdot 10^{22}kg$ we arrive at
$$F_G = 2.744 mN.$$

This is about the same attraction you'd experience if you'd stand 2m in front of a space shuttle (thanks to Wolfram Alpha).

So the answer is: No, you are not affected in any tangible way.

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    $\begingroup$ Your answer should explain the relationship between the gravitational force and the tidal force. $\endgroup$ – PM 2Ring May 10 '19 at 11:34

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