HoldsUp

Ronald Krauss

Children’s Hospital Oakland Research Institute

Ronald Krauss, M.D., is the director of atherosclerosis research at Children’s Hospital Oakland Research Institute and an adjunct professor at UCSF and UC Berkeley. His research focuses on lipid metabolism, having developed an assay to quantify low-density lipoprotein (LDL) particle size and concentration. His published work covers dietary effects on cardiometabolic disease and insulin sensitivity, statin responses, and the relationship between cholesterol regulation, genetics, and Alzheimer's disease.

38 claims checked on air: 2 context 2 overstated 33 supported 1 unverified 2 flagged

What they said on air - context

2 citing their own research

0:31:20needs contextmoderateDr. Ronald Krauss on LDL Cholesterol, Particle Size, Heart D

The effect of dietary cholesterol on blood cholesterol levels and cardiovascular disease risk in the general population is very small to almost unmeasurable.

"And when I went through the literature, I was just astonished at how small the effect is, and it's very difficult to even imagine how an effect of excess dietary cholesterol could influence heart disease risk, unless one just either had a mutation that caused the cholesterol to build up or one was eating an enormous amount of dietary cholesterol. But for the most part, the effect was so small that it was almost unmeasurable." (said at 0:31:20)

Systematic reviews, meta-analyses, and the American Heart Association (AHA) Science Advisory confirm that the relationship between dietary cholesterol and cardiovascular disease (CVD) risk is generally weak or non-significant in general population observational cohorts. However, characterizing the effect on circulating cholesterol as 'almost unmeasurable' is an exaggeration: randomized feeding trials reliably show a modest, statistically significant dose-dependent increase in serum total and LDL cholesterol (approximately 1.9 to 4.6 mg/dL per 100 mg/day of dietary cholesterol, or an average net increase of ~6.7 mg/dL LDL).

1:12:13needs contextmoderateDr. Ronald Krauss on LDL Cholesterol, Particle Size, Heart D

The average LDL cholesterol level in the general population is approximately 115 to 120 mg/dL, and average levels in heart attack patients are only slightly higher.

"the average uh in the population is something like 115 or 120 milligrams per deciliter. Um uh uh if you take a a population of heart attack patients, it's only slightly higher than that." (said at 1:12:13)

National survey data from NHANES (1988-2010) confirm that the mean LDL cholesterol level among US adults declined to approximately 116 mg/dL (matching the speaker's 115-120 mg/dL range). In patients hospitalized with acute coronary artery disease, data from the Get With The Guidelines registry (136,905 hospitalizations) found a mean admission LDL cholesterol level of 104.9 mg/dL, with nearly half of patients having LDL under 100 mg/dL. Thus, while the speaker's broader point that heart attack patients do not present with markedly higher LDL levels than the general population is accurate, their average admission LDL is actually slightly lower (around 105 mg/dL) rather than slightly higher, partly influenced by acute-phase lipid changes and baseline lipid-lowering therapy.

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