A patient reports taking extremely high doses of vitamin C and vitamin A daily. Based on solubility and storage characteristics, which clinical expectation is most consistent with these supplement habits?

Both vitamins are fat-soluble and therefore stored in the liver and adipose tissue; the main difference between them is that vitamin A functions only as an antioxidant whereas vitamin C is only an enzyme cofactor, so toxicity profiles differ because of their biochemical roles rather than storage.

Vitamin C will accumulate in adipose tissue because its oxidative metabolites are fat-loving, leading to long-term storage and potential toxicity, while vitamin A must be consumed daily because it is water-soluble and not stored.

Excess vitamin C is likely to be excreted in urine with low long-term storage, while excess vitamin A is at risk of accumulating in tissues and may cause toxicity if intake is very high over time.

Both vitamin C and vitamin A will be rapidly excreted in the urine because the kidney filters all small molecules regardless of fat solubility, so toxicity is unlikely for either vitamin.