Toxicity|Vitamin|C|Biochemistry|Pharmacy Technician|Dr Muhammad Naeem Asghar RPh @drnaeempharmacist381 Toxicity Have no well known toxicity but it may cause following effects:- a. Erythrocytes of premature infants may be at greater risk for oxidative damage, b. Excess ascorbic acid excreted in urine give a false +Ve test for sugar, c. It has been implicated in the formation of urate and oxalate stones.