Your cholesterol can be too low: Here are the results of a Google search on “low cholesterol” and “suicide”, the association between which was recently brought to my attention. Does low cholesterol or some aspect of a cholesterol-lowering lifestyle (rigidity? self-discipline? preoccupation with one’s cardiac risk factors? anxiety about one’s physical health in general? lower body weight? some effect of cholesterol-lowering drugs? some metabolic effect e.g. on brain chemistry of low cholesterol?) contribute to depression, or perhaps to poorer treatment response to antidepressants, somehow? Does a depressive biochemistry or personality somehow contribute to low cholesterol? Or are both correlated, without a causal link, with some other factor?