Curium is a hard, brittle, radioactive silvery metal. It does not occur in nature and must be made in a nuclear reactor by neutron capture reactions from plutonium and americium isotopes. It tarnishes slowly in dry air at room temperature.
Romaine lettuce is a rich source of fiber and has very few calories, only 8 in a one-cup serving. In terms of vitamins, a cup of Romaine lettuce delivers more than 50% of your daily requirement for vitamin A, as well as significant levels of vitamin K and vitamin C.
The rich supply of vitamin A and vitamin C found in romaine lettuce helps to protect against eye disorders. Deficiencies in these antioxidants can lead to a thickening of the cornea, glaucoma, cataracts, macular degeneration, and possibly even blindness as one ages.our body does not make powerful vitamin C on its own naturally and relies on foods high in vitamin C. The body also does not store vitamin C, so it is important that you get this essential vitamin frequently from whole food sources including leafy greens like romaine lettuce.