The gravitational effect of the Moon on the human body is considered negligible compared to its influence on which Earth feature?

The oceans (tides)

While the Moon exerts a powerful gravitational influence that is responsible for the rise and fall of the ocean tides, its effect on the minute fluid volumes contained within the human body, such as blood or cerebrospinal fluid, is considered negligible. The tidal forces exerted on something as small as a human being are vastly overpowered by much more localized environmental factors. For example, changes in barometric pressure or even the slight gravitational influence of a nearby large structure can exert a comparatively larger effect on the internal environment of a person than the distant celestial body. Therefore, gravity from the Moon is not considered a mechanism capable of altering behavior or triggering medical emergencies within the body.