There is some research on this. I'll try and find an article I read about it a while ago. Here it is: "Body weight homeostat that regulates fat mass independe

There is some research on this. I'll try and find an article I read about it a while ago. Here it is: "Body weight homeostat that regulates fat mass independently of leptin in rats and mice" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5777058/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5777058/ It's different than exactly what you were talking about, but the idea of "gravitostat" is interesting so I thought I'd still add it.