Such a study requires a drug which is practically specific for one condition whose prevalence is known, and the one which approximates most closely to this appears to be vitamin B12
It takes about an hour to receive the full dose
SLC7A11 acts as an exchange transporter to import cystine in exchange for glutamate, whereas SLC3A2 functions as a molecular chaperone to maintain SLC7A11 protein stability and membrane localization [10]
BSCSF was provided as a dry extract powder with a crude drug-to-extract ratio of 2.9:1 (w/w) by the Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences

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It does, however, require fewer applications