Q. What hormone can be used to overcome jet lag?

Jet lag takes place when an individual's biological clock is out of sync with local time. According to general rule it takes about a day for each hour of time zone change to recover from jet lag. Melatonin, available as a dietary supplement, is many times used to induce sleep when traveling. It is more useful when traveling east and may be taken during, before or after traveling. It is best taken approximately five to seven hours before usual bedtime in the old time zone. Travellers must consult their physicians before using melatonin. It isn't recommended for breast-feeding or pregnant women and children.