Is there any danger of very low cholesterol levels? My LDL is 50 and HDL is 51. Triglycerides are 25. I don't take any cholesterol medication.

YES! . Quoting dr. Ronald hoffman"very low cholesterol is associated with dementia, depression, moodiness, aggressive behavior, violence & decreased learning ability and intelligence.It's also a risk factor for...Increased mortality from cancer, infections and suicide." men with chol. Below 150 have 4x the risk of cerebral hemorrhage than men with levels >190. See http://www.Ctds.Info/low_cholesterol.Html.