I hope it is available soon! Red foods are so good for us, and I am not fond of beets.

FROM DARRELL FLUMAN:  
 
The trouble with spinach is the relatively high levels of oxalic acid as oxylates which tie up calcium and iron.  
 
Collards provide a much greater usable portion of these two nutrients. Almost 10 times more.  
 
From Wikipedia.com:  
 
"Spinach, along with other green, leafy vegetables, contains an appreciable amount of iron attaining 21% of the Daily Value in a 100 g (3.5 oz) amount of raw spinach. For example, the United States Department of Agriculture states that a 100 g (3.5 oz) serving of cooked spinach contains 3.57 mg of iron, whereas a 100 g (3.5 oz) ground hamburger patty contains 1.93 mg of iron. However, spinach contains iron absorption-inhibiting substances, including high levels of oxalate, which can bind to the iron to form ferrous oxalate and render much of the iron in spinach unusable by the body. In addition to preventing absorption and use, high levels of oxalates remove iron from the body.  
 
"Calcium  
 
"Spinach also has a moderate calcium content which can be affected by oxalates, decreasing its absorption. The calcium in spinach is among the least bioavailable of food calcium sources. By way of comparison, the human body can absorb about half of the calcium present in broccoli, yet only around 5% of the calcium in spinach."  
 
You won’t cure world hunger with spinach, red or green.  
 
--Darrell Fluman