But please do NOT use this as a reason to stop eating a low-cholesterol diet.
More studies are needed.
Do not go changing your diet just yet.High Cholesterol and Heart Disease (Suburban Myth 71)
Average LDL cholesterol in the U.S.: 131 mg/dl. Average LDL cholesterol for people with heart attacks: 134 mg/dl.*
Several people questioned my listing as a suburban myth the claim that too much animal fat and cholesterol in the diet promote atherosclerosis and heart attacks. To those who doubt that this is a myth I recommend you begin with a short article from the Skeptical Inquirer by Lewis Jones called "Risk Factor." Here is a sample:
http://www.csicop.org/sb/9503/risk.html You might expect that any rational thinker would be able to distinguish between a correlation and a cause. Otherwise the possession of a driving license would have to count as a "risk factor" for a fatal car accident, and learning to swim would be a "risk factor" for drowning. Nevertheless, an entire health-alarm industry has fallen in love with the association game. The belief seems immune to disproof. James McCormick and Petr Skrabanek gathered together the results of all the major intervention trials, and published the resulting tables in the medical journal The Lancet (Oct. 8, 1988). The various interventions manipulated diet, smoking, blood pressure, exercise, and reducing weight, and covered 828,000 man-years. "This summary shows no experimental evidence to support the notion that intervention programs prevent coronary heart disease or reduce overall mortality. . . . Despite this considerable body of evidence, which shows no benefit for intervention, many have interpreted the results as supportive of their wishful thinking." This review, they say "provides no data to justify the time, energy, and money which are being devoted to this crusade."
One of the favorite villains right now is cholesterol. Most of the public had never heard of it before the present hit list was drawn up, but now many of them are altering their entire lifestyle and eating habits trying to avoid it. This is in spite of all the evidence showing the pointlessness of any such measures.
The result produced by 115,176 man-years of observation was that "lowering cholesterol by drugs did no good and may have done harm." The same applies to altering cholesterol by diet. In Sweden, for example, coronary deaths in middle-aged men were rising while the risk factors were falling. In a number of countries, death rates for men and women are moving in opposite directions, in spite of the fact that they eat the same foods. In fact, most people with heart disease have a normal cholesterol level.The Jones article will start you thinking about the issue. Next, I refer the reader to a lengthy article by science writer Gary Taubes that appeared in Science magazine in April 2002 ("The Soft Science of Dietary Fat"). Taubes will provide you with a bit of the history of how correlations have become the holy grail of research into cholesterol, fat, and heart disease.
http://www.second-opinions.co.uk/taubes.htmlA fine summary of the weaknesses of the cholesterol-to-coronary-heart-disease belief is given by Malcolm Kendrick, M.D. at
http://www.thincs.org/Malcolm.choltheory.htm.More:
http://skepdic.com/news/newsletter55.html#myth71AGAIN, MORE STUDIES ARE NEEDED AND YOU SHOULD NOT CHANGE YOUR DIET BASED ON THE ABOVE INFORMATION WHICH IS IN NO WAY THE FINAL WORD YET.See also:
* Low cholesterol? Don't brag yet ("...increasingly, doctors are identifying a group of people whose levels of LDL, the so-called bad cholesterol, are low, but who still appear to be at increased risk for atherosclerosis, heart attack and stroke.")
http://www.deccanherald.com/deccanherald/may302005/snt103032005529.asp * Ageing cells may lead to clogged arteries ("Cutting cholesterol from one's diet does not always prevent cardiovascular problems, says endocrinologist Clay Semenkovich of the Washington University School of Medicine in St. Louis, Missouri. 'Probably the majority of people who have heart attacks have a normal cholesterol level,' he says. 'That suggests that there is something more going on.'")
http://www.nature.com/news/2005/050523/full/050523-7.html * High Cholesterol? With Children, It May Not Matter ("Even if testing were to find a cholesterol level of 240 or over, he
adds, no diet study has ever demonstrated more than a negligible improvement in children's cholesterol levels.")
http://www.nytimes.com/2005/05/31/health/nutrition/31ibeg.html?
AGAIN, MORE STUDIES ARE NEEDED AND YOU SHOULD NOT CHANGE YOUR DIET BASED ON THE ABOVE INFORMATION WHICH IS IN NO WAY THE FINAL WORD YET.