AHA Scientific Sessions 2026 AbstractNov 9, 2026, 00:49 GMT

Very low “bad” cholesterol not linked to added cognitive risk

Cognitive impairment risk was similar—a hazard ratio of 1.00—at “bad” cholesterol below 30 mg/dL versus 30–55 mg/dL in adults with artery disease.

Paper by Armin Nouri, Shefa Arya Nezhad, Raiza Rossi, +10Michael G. Nanna · Yale University

Brains with similarly intact folds sit beside blood cells and sparse versus plentiful cholesterol particles.

Our read

Populations

Studied:: Cohort study of adults with established ASCVD receiving LLT, approximately 3.1 years
What changed:: Incident cognitive impairment did not differ (HR 1.00) with LDL-C <30 mg/dL against LDL-C 30-55 mg/dL
The catch:: Cognitive outcomes relied on recorded diagnoses, which could miss unrecognized problems
In the record:: The 258th paper on LDL-C with results in people; 603 on record in all.

Editor of record: Boris Djordjevic · AgingResearch.News

Paper

Adults aged 45 or older with atherosclerotic cardiovascular disease, caused by fatty buildup in arteries, were compared in a retrospective observational cohort study. All received cholesterol-lowering drugs. Each matched group included 173,804 people. Participants’ mean age was 69.3 years, and 33.6% were women.

The researchers compared low-density lipoprotein (“bad”) cholesterol below 30 mg/dL with levels of 30–55 mg/dL. Over a median follow-up of approximately 3.1 years, the lower level was not associated with increased cognitive impairment. This outcome combined diagnoses of mild cognitive impairment, cognitive decline, memory disorders or dementia. The lower cholesterol level was associated with a slightly lower hazard of Alzheimer’s disease. Bleeding stroke risk did not differ significantly: its hazard ratio was 1.00, indicating similar risk between groups.

Why it matters

Cognitive decline and dementia are concerns in later life. This comparison addresses whether intensive cholesterol lowering for established artery disease is associated with cognitive harm.

Caveats

Cognitive outcomes relied on recorded diagnoses, which could miss unrecognized problems. Matching on 52 baseline variables could not rule out differences in patients’ health or care; the findings were reported in a conference abstract.