Are boiled eggs harmful to health

Are eggs really that unhealthy?

Meta-analysis: Regular egg consumption does not endanger heart health

You can enjoy the colored eggs with a clear conscience. The consumption of up to one egg per day is considered harmless for the heart, only diabetics should be careful.

The fact is: one egg provides two-thirds of the recommended daily cholesterol requirement. Since high cholesterol increases the risk of cardiovascular disease, excessive consumption of eggs (more than two eggs per week) was always warned. But is this warning really justified?

A meta-analysis on the dose-response relationship of regular egg consumption tries to provide a little explanation against the background of the ongoing debate around this topic. On the basis of 17 prospective cohort studies after an exclusion procedure, the risk of increased egg consumption for developing coronary heart disease or suffering a stroke was investigated.

A total of around half a million test subjects were included in the meta-analysis. At the beginning of the observation period, the participants did not show any cardiovascular diseases. Over the period of observation, which in the evaluated studies was between eight and 20 years, 5847 cases of coronary heart disease and 7579 stroke events were documented. The scientists found no significant association between consuming one egg a day and the occurrence of strokes or coronary artery disease.

On the contrary, the daily egg actually reduced the risk of hemorrhagic stroke. The subgroup analysis showed, however, that diabetics should keep an eye on their egg consumption, because their risk of coronary artery disease increases by 50 percent if they eat one egg per day.

Assessment: are eggs really that unhealthy?

At first glance, the knowledge gained in the present meta-analysis appears plausible. At least the included studies were comparable according to the effect estimates made by the scientists.

However, it is not clear what role the diet, in particular the other intake of cholesterol, could have influenced the result. Ultimately, these results do not mean a free pass to mass egg consumption. With a balanced diet, however, healthy people may courageously reach for the egg from time to time, because eggs are known to contain not only cholesterol, but also healthy ingredients such as protein and various vitamins.

But Attention: Unfortunately, this recommendation does not apply to chocolate eggs!


Rong Y, Chen L, Zhu T, Song Y, Yu M, Shan Z, Sands A, Hu FB, Liu L. Egg consumption and risk of coronary heart disease and stroke: dose-response meta-analysis of prospective cohort studies. BMJ 2013; 346: e8539 abstract

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