' 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.
Arginine is found in meat, fish, dairy, eggs, nuts, seeds, whole grains, chocolate, carob and. legumes, particularly soy; however, research is limited in demonstrating the types of foods containing arginine that will increase nitric oxide production. Pistachio nuts contain high concentrations of arginine, increase your production of nitric oxide and can help men with erectile dysfunction.