“Where Does the Gravitostat Fit In?”, Claes Ohlssona, John-Olov Jansson2018-02-13 (gravitostat)⁠:

[Rebuttal letter: the gravitostat is supported by hypergravity; astronaut microgravity experiments are only weak counterevidence because microgravity and space travel badly damages health in many ways, hiding any potential weight gain.

The gravitostat may fit in the two-systems model of weight, in which case a testable prediction is that it should have different effects in rodents with different weight/leptin combinations.]