Abnormally high levels of HDL-C, colloquially known as "good cholesterol," are associated with an increased risk of dementia in older adults, a study has found. Researchers said very high levels of HDL-C linked to dementia risk in this study were uncommon and not diet related, but more likely to reflect a metabolic disorder. The findings may help doctors to recognize a group of older patients potentially at risk of dementia. Over an average 6.3 years, participants with very high HDL-C (>80 mg/dL or >2.07 mmol/L) at study entry were observed to have a 27% higher risk of dementia compared to...