As chickens get older, their blood cholesterol goes up — but that doesn’t tell you how bad their artery damage is. You need to watch them for years to really understand how diet affects their arteries.

Scientific Claim

Long-term dietary fat manipulation in laying hens reveals that plasma cholesterol levels increase with age but are not reliably predictive of aortic lesion severity, emphasizing the necessity of prolonged studies to understand lipid metabolism in atherosclerosis.

Original Statement

“The plasma-cholesterol values... indicate a small increase in concentration with advancing age... This observation supports the necessity for long-term studies to evaluate the true effect of dietary manipulation on blood lipid metabolism and its relationship to arteriosclerosis.”

From study:Effect of prolonged feeding of differently saturated fats to laying hens on performance, blood pressure, plasma lipids and changes in the aorta

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

association

Can only show association/correlation

Assessment Explanation

The claim uses 'reveal' and 'emphasizing' appropriately to describe an observational trend. No causation is implied, and the conclusion aligns with the study’s design and data.

Evidence from Studies

Supporting (1)

Effect of prolonged feeding of differently saturated fats to laying hens on performance, blood pressure, plasma lipids and changes in the aorta

Cohort Study

Animal

1960

The study found that as hens got older, their blood cholesterol went up, but that didn’t always mean their arteries got more damaged — so you can’t just use cholesterol levels to predict heart problems, and you need to study them for a long time to really understand what’s happening.

Contradicting (0)

No contradicting evidence found

Source Study

Effect of prolonged feeding of differently saturated fats to laying hens on performance, blood pressure, plasma lipids and changes in the aorta

Score: 12

DOI: 10.1079/BJN19600058

Similar Assertions

Hens fed animal fat died more often, had more cholesterol in their blood and arteries, but surprisingly had less visible artery damage than hens fed no extra fat — meaning more fat in the arteries doesn’t always mean worse damage.

90%

In chickens, the lower part of the main artery has more cholesterol and more damage than the upper part — and how bad the damage is in each bird is linked to how much cholesterol is in that specific spot, not how much cholesterol is in the whole body.

84%

Feeding hens corn oil for three years seemed to reduce artery damage more than feeding them no extra fat, even though their blood cholesterol didn’t change much — maybe the type of fat matters more than how much cholesterol is in the blood.

82%

Corn oil made the chickens’ blood and arteries richer in certain healthy fats, while animal fat made them poorer in those fats — but this had nothing to do with how much cholesterol was in their blood.

79%

Adding fat to the chickens’ diet didn’t change their blood pressure — so high blood pressure probably isn’t why their arteries got damaged.

78%