Melatonin needs to be taken at the right time of day in the right dose to be effective, but how much to take is poorly understood. The amount of melatonin in over-the-counter supplements can raise the level in the body up to 20 times normal. Adverse effects of melatonin are minimal, but long-term studies examining efficacy and toxicity of melatonin supplements are needed.
Acupuncture is often used in traditional Chinese medicine for the treatment of insomnia. This procedure involves the insertion of very fine needles (sometimes in combination with electrical stimulus or with heat produced by burning specific herbs) into the skin at specific acupuncture points in order to influence the functioning of the body. The results of recent studies have shown acupuncture improved sleep quality in people with insomnia. However, additional research is required before the effectiveness of acupuncture is proved conclusively for the relief of insomnia.
Relaxation and meditation or mindfulness
Increased muscle tension and intrusive thoughts can interfere with sleep. Therefore, it is not surprising that techniques aimed at relaxing muscles (progressive muscle relaxation and biofeedback) and quieting the mind (meditation) have been found to be effective treatments for insomnia. Most people can learn these techniques, but it usually takes several weeks before they can sufficiently master them well enough to help ease insomnia. There is a growing body of evidence that supports the value of meditation in treating insomnia. Several studies show that regular meditation practice, either alone or as a part of yoga practice, results in higher blood levels of melatonin, an important regulator of sleep.
Regular exercise deepens sleep in young adults with or without sleep disorders. In addition, several studies show that exercise can improve sleep in older adults. Recent studies show that even the low-to-moderate tai chi and certain yoga practices enhance sleep quality in older persons and cancer patients with sleep problems, respectively. Although consistent exercise has been shown to improve sleep quality, most experts advise exercising at least three to four hours before bedtime to avoid interference with sleep.