The influence of a high‐oxalate/low‐calcium diet on calcium oxalate renal stone risk factors in non‐stone‐forming black and white South African subjects

Factors which are conventionally used to assess stone risk (pH, oxaluria, citraturia, relative supersaturation) are not helpful in identifying why South African blacks are relatively immune to stones. We suggest that relatively lower oxalate absorption rates may be a physiological feature of this racial group.