Are You having problems
feeling sleepy when you want to be alert and vice-versa? Perhaps you need to
look at your diet, as it may be the culprit. The brain's state of sleepiness or
alertness, calmness or anxiousness is said to be determined by messengers in
the body called neuro-transmitters.
One of these which is
called serotonin helps us feel calm and relaxed. Researchers have found that
eating large amounts of carbohydrate foods, such as sweets, potatoes and grain
products increases brain levels of serotonin. High-protein meals or snacks,
consisting mostly of meat, on the other hand, tend to cause brain levels of
serotonin to remain low.
A French study that
varied the amount of carbohydrate fed to subjects found that an intake of
carbohydrate with an equal serving of protein products did not cause drowsiness.
But when very large amounts of carbohydrate were provided without protein,
subjects reported feeling drowsy. This drowsiness occurred even after exercise
which normally causes people to feel more alert.
We can take advantage
of these findings to determine when to stay alert or to get some sleep. A snack
that is largely carbohydrate-based may relax us and make it easier for us to
fall asleep. On the other hand, when you are trying to stay awake, a balanced
meal that includes protein (meat, chicken, fish, dairy products or dried beans)
as well as modest portions of grains, vegetables and fruit is more likely to
help than loading up on a huge platter of meatless pasta.
Some experiments
suggest that the effects may vary depending on the particular carbohydrate
foods chosen. The ability of carbohydrates to increase brain serotonin involves
a rise in insulin levels in the blood when carbohydrate is eaten. Large
carbohydrate portions, or those that cause a faster rise in blood sugar such as
sweets, potatoes, bread, refined cereals will cause greater increases in
serotonin (and sleepiness). Fruit and dried beans contain carbohydrate that
raises blood sugar more slowly, and so would not be expected to raise serotonin
levels as high.
But what about good
nutrition? Eating to stay alert just means including some protein in our meals.
However, do not overeat grain products just because they are fat-free. By
including plenty of high-fiber fruit or vegetables in meals, blood sugar and
insulin will rise moderately, and serotonin level in the brain will not jump
dramatically.
Nevertheless when it
comes to getting a good night's sleep, studies clearly show that it is more
than just what we eat. Some people are very sensitive to caffeine in coffee,
tannin in tea and even to soda pops, even when it is consumed as early as 5.00
p.m. Other people find that the key to a good night's sleep lies in
establishing a routine pattern of pre-bedtime behaviors, keeping a consistent
bedtime, getting regular exercise, and learning relaxation techniques. If you
are extremely sleepy throughout the day, check your eating patterns. Do not try
to compensate for lack of sleep at night by eating protein and scraping by on
caffeine; adequate sleep is essential.
Summary: Carbohydrates contain serotonin
which helps make us feel calm and relaxed. Consuming large amounts of
carbohydrates causes drowsiness as they make us feel relaxed. However, if we
want to stay alert, we should consume a balanced meal containing protein and
carbohydrates. Research suggests that carbohydrates increase brain serotonin
leading to a rise in insulin levels in the blood. Therefore, a correct diet
helps in keeping us alert as the blood sugar, serotonin and insulin levels rise
only moderately. Getting enough sleep is also necessary and to some people, it
means having an adequate established routine before going to bed.
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