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Women whose biological clocks have been shown to be "early awake" are at a lower risk of breast cancer, British scientists say. According to a team at Bristol University, the reason for this is still unclear.
In their view, this finding is important, as it can affect any woman who is at risk.
Experts say the results of the study presented at the Cancer Cancer Conference in Glasgow are the next to confirm the importance of sleep overall for health.
Biological clock
Everyone has a biological watch that controls how the body works in about 24 hours. It is also known as the circadian rhythm.
This affects everything – from when our mood is asleep and even the risk of heart attack.
However, each clock does not look the same.
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Rare people become early, their energy reaches their peak during the day and they get tired earlier in the evening.
Other types of people get harder in the morning, their productivity reaches the upper level later and prefer to go to sleep later.
Is this in any way associated with breast cancer?
Scientists think yes. They have used an intelligent new way of analyzing data called Randomization by Mendel.
We reviewed 341 DNA fragments that check whether we are birds early or night.
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They then used this information to conduct an experiment with more than 180,000 women from the Biobanka program in the UK and about 230,000 women in a Cancer Association study.
The results show that the likelihood of breast cancer disease in women who are genetically programmed to be early awake is lower than that of the other group.
Because these DNA fragments are born at birth and are not associated with other known cancer-causing factors, such as obesity, it means scientists are pretty sure that biologists have a finger on cancer.
How big is the result?
Nearly one in seven women in the UK suffers from breast cancer in their lives.
This study, however, focuses only on a woman's 8-year life span.
For this period, according to the study, 2 out of 100 women who go late to sleep and later develop cancer, compared to one in 100 premature.
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If a person sleeps well, will he prevent cancer?
It's not that simple.
According to Dr. Rebecca Richmond, one of the authors of the study, is still too early to give women clear advice.
"We still have to find out exactly what a group of women is in jeopardy, we need to find the connection," Richmond told the BBC.
Do scientists do it?
Science is never 100% sure, but the results of this study coincide with other findings.
According to the World Health Organization, disruption of human biological clocks due to shift work is probably related to the risk of cancer.
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