Amaranth is particularly rich in manganese and magnesium. Cooked amaranth leaves are a rich source of vitamin A, vitamin C. Amaranthus is also known as Chinese spinach. They are available in light purple, green or a bicolour of the two. Amaranthus is also known as Chinese spinach. They are available in light purple, green or a bicolour of the two. Amaranthus is an excellent source of elements like foliate, calcium, phosphorous, Vitamin C, A and a powerhouse of Iron.