' 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.
However, they are also found naturally in foods like vegetables, foods that are generally perceived as healthy and linked to a reduced risk of cancer (5, 6). Vegetables are actually the biggest dietary source of nitratesâ¦ by far. The amount you get from processed meat is small compared to vegetables (7). Our bodies also produce nitrates in large amounts and secrete them into saliva (8, 9).