12 I et klinisk studie var cystin baseline i de hvide blodlegemer 3, 73 (fra 0, 13 til 19, 8) nmol hemicystin/ mg protein og blev vedligeholdt tæt ved 1 nmol hemicystin/ mg protein med en cysteamindosis på fra 1, 3 til 1, 95 g/ m2/ dag.
In one clinical study, baseline white cell cystine levels were 3.73 (range 0.13 to 19.8) nmol hemicystine/ mg protein and were maintained close to 1 nmol hemicystine/ mg protein with a cysteamine dose range of 1.3 to 1.95 g/ m2/ day.