Dobar tekst o cikli imate na:
http://whfoods.org/genpage.php?dbid=49&tname=foodspice

a u vezi oksalne kiseline:

Beet greens and, to a lesser extent the roots, contain oxalic acid. Oxalates are naturally occurring substances found in plants, animals, and human beings. When oxalates become too concentrated in body fluids, they can crystallize and cause health problems. For this reason, individuals with already existing and untreated kidney or gallbladder problems may want to avoid eating beets. Since oxalates can also interfere with the absorption of calcium, individuals trying to build their calcium status may also want to avoid these foods, or if taking calcium supplements, may want to take them several hours before or after eating beets or beet greens.

Ako nemate problema s bubreznim-zucnim kamencima mislim da povremeno uzimanje cikle nije problematicno, ipak je ona odlican prirodni izvor folata i antioksidansa.