More likely hood to to of stroke, suicide, or depression with lower cholesterol then higher cholesterol. Low cholesterol is a sign you may be having bile issues resulting fat malabsorption, or you may have an infections or mold exposure. Its a sign you immune system is having major issues. Cholesterol is a major component of the brain. If you are on TRT, thyroid they can also lower cholesterol as well as they burn lipids. I would also look at pregnenolone levels. If they are low then you know you have possible issues with the main building blocks by not having enough fats despite eating them.
There is also a genetic issue called SLOS. Are you on statin drugs?