# Given that the Moon affects tides and most of the human body is water, do tides affect people?

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?

• 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. – PM 2Ring May 10 '19 at 8:28

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
$$F_G = 2.744 mN.$$