' 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.
Hereâs how to keep added nitrates and nitrites out of your body: 1  Minimize your consumption of processed foods and cured meat products such as hot dogs, sausage and cold cuts. 2  Check labels carefully and avoid products that list sodium or potassium nitrates and nitrites. 3  Eat organic food.  Find out if your water is tainted with nitrates or nitrites.