' An Act to preserve daylight and provide standard time for the United States ' was enacted on March 19, 1918. [See law] It both established standard time zones and set summer DST to begin on March 31, 1918. Daylight Saving Time was observed for seven months in 1918 and 1919.
Nitrate-rich foods include lettuce, parsley and spinach. âLeafy vegetables contain chemical nitrate that improves heart health,â the Mail Online reports. In a recent study, researchers looked at the effects of a nitrate-rich diet on rats.
2. Foods containing high levels of nitrites and nitrates âmay be highly predictable migraine triggers in some individuals.â. Cured and smoked meats, such as cold cuts, hot dogs, bacon, and sausage contain high levels of nitrates.oods High in Nitrates. Foods containing high levels of nitrites and nitrates âmay be highly predictable migraine triggers in some individuals.â. Cured and smoked meats, such as cold cuts, hot dogs, bacon, and sausage contain high levels of nitrates.