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Sleep is a condition of body and mind which typically recurs for several hours every night, in which the nervous system is inactive, the eyes closed, the postural muscles relaxed and consciousness practically suspended(1).

Why do we sleep? 
We tend to think of sleep as a time when the mind and body shut down. But this is not the case sleep is an active period in which a lot of important processing,
restoration and strengthening occurs(2)

In broad terms researchers believe it is to enable our bodies and especially our brains to recover. Our bodies all require long periods of sleep in order to restore and rejuvenate, to grow muscle, repair tissue and synthesise hormones (2).

Recently researchers have been able to find out some of the detailed processes involved. During the day brain cells build connections with other parts of the brain as a result of new experiences. During sleep it seems that important connections are strengthened and unimportant ones are pruned (3).

How much sleep is required?
There is no set amount of time that everyone needs
to sleep, since it varies from person to person. Results from the sleep profiler indicate that people like to sleep anywhere between 5 and 11 hours, with the average being 7.75 hours (4).

What would happen if we didn't sleep?
Research also shows that sleep-deprived individuals often have difficulty in responding to rapidly changing situations and making rational judgements. Sleep deprivation not only has a major impact on cognitive functioning but also on emotional and physical health. Disorders such as sleep apnea which result in excessive daytime sleepiness have been linked to stress and high blood pressure.

Research has also suggested that sleep loss may increase the risk of obesity because chemicals and hormones that play a key role in controlling appetite and weight gain are released during sleep (4).

Life On Sleep-Life has a unique formula of naturally occurred African herb Griffonia Simplicifolia, this plant seed extract is used as an herbal supplement for their 5-hydroxytryptophan (5-HTP) (5).

5-hydroxytryptophan (5-HTP) is a chemical that the body makes from tryptophan (an essential amino acid that you get from food). After tryptophan is converted into 5-HTP, the chemical is changed into another chemical called serotonin (a neurotransmitter that relays signals between brain cells).

5-HTP dietary supplements help raise serotonin levels in the brain. Serotonin helps regulate mood and behaviour, 5-HTP may have a positive effect on sleep, mood, anxiety, appetite and pain sensation (5).

5-HTP contributes in treatment of fibromyalgia it symptoms includes pain, anxiety, morning stiffness and fatigue. Many people with fibromyalgia have low levels of serotonin. Recent research suggests that 5-HTP raises the levels of serotonin in the brain helps in treatment (5).

5-HTP contributes in treatment of Insomnia people who took 5-HTP went to sleep quicker and slept more deeply. Researchers recommend 200 to 400 mg at night to stimulate serotonin, but it may take 6 to 12 weeks to be fully effective (5).

1. english/sleep why-do-we-need-sleep
3. environment-32606341
4. sleep/articles/whatissleep.shtml
5. supplement/ 5hydroxytryptophan-5htp