One in eight people report feeling tired all the time.

One in eight people report feeling tired all the time.



A survey by YouGov, an internet-based market research firm, found that one in eight people report feeling tired all the time and one in four feel tired most of the time. The survey was carried out at the beginning of the year in the United Kingdom.

This result can be understood by realizing that about a third of the population does not sleep the minimum of seven hours a night and only one in five manages to achieve a full eight hours of sleep. However, there are people who feel tired regardless of the amount of hours they sleep every night.

Science points out six reasons that could be stealing your energy even if you manage to get the recommended eight hours of sleep every night.


Snoring is those famous and annoying sounds made by some people while sleeping. About 10% of snorers suffer from a condition called sleep apnea. This condition occurs when the walls of a person’s throat relax and narrow while they sleep, blocking their airway — stopping breathing for a few seconds.

Sleep apnea prevents the body from resting properly during deep sleep, putting extra stress on our organs. During an episode, the lack of oxygen triggers the patient’s brain to bring them out of deep sleep so their airways reopen.

The condition has been linked to high blood pressure, which in turn can lead to strokes and heart attacks. A recent study of more than 4,000 sleep apnea patients showed that the problem can increase the risk of cancer.

caffeine time

Coffee is one of the most popular drinks in the world and is very successful among Brazilians. Precisely by giving extra energy for its stimulating function, the liquid can end up stealing the quality of your sleep hours.

In a 2013 study by researchers at the Sleep Disorders Research Center in Detroit, USA, it was found that people who consumed coffee, tea or energy drinks six hours before going to bed slept one hour less. The study was done on 16 “good sleepers,” all of whom slept six to eight hours a night and typically fell asleep within 30 minutes of going to bed.

Caffeine makes you more alert by blocking sleep-promoting receptors in your brain called adenosine receptors. High concentration before sleep can affect the body’s relaxation to rest and delay your internal biological clock.


Your body needs water to carry out all the functions that take place in it. Leaving the brain dehydrated causes great mental fatigue, in addition to the risk of triggering headaches.

A 2019 study by Peking University researchers looked at the effects of severe dehydration on brain power and mood. They recruited 20 people who went without drinking water for 36 hours.

By observing the mood of the participants before and after the water deprivation, the scientists found that dehydrated people felt twice as tired as the control group that ingested the liquid normally.

undiagnosed diabetes

Constant low energy can be one of the symptoms of diabetes. The condition happens when your body becomes insensitive to the hormone insulin, which is responsible for controlling blood sugar levels.

As the glucose that is running in the blood vessels does not go to the cells properly, the body sends signals of lack of energy to carry out day to day functions and activities.

In addition, diabetes interferes with the quality of sleep, reducing the regenerative potential that rest at night brings.

lack of iron

Not eating enough red meat, dark green vegetables or legumes can be the cause of your sleepiness. These foods are all rich in iron, an important component of hemoglobin, a type of protein in red blood cells that carries oxygen from the lungs to all parts of the body.

Dozens of studies have shown that being deficient in the mineral can lead to anemia, a condition that causes tiredness, shortness of breath and an irregular heartbeat.

A scientific review by researchers at the University of Manitoba in Canada analyzed data from 18 clinical trials and found that taking iron tablets significantly reduced fatigue levels in non-anemic people. They suggested that taking iron supplements and eating iron-rich foods should be recommended for anyone who is feeling tired.

Iron pills should not be taken without medical advice.


Another reason for tiredness is low levels of the hormone T4 (thyroxine). It affects the metabolism of the entire body and the lack of it slows down the brain, and consequently the body feels more tired.

Low T4 concentration also lowers mood, because the hormone also regulates your emotional processing.

Treatment for hypothyroidism is medication and should be guided by an endocrinologist.

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