Vitamin C is known to enhance iron absorption by reducing nonheme ferric (Fe+3) iron to the ferrous (Fe+2) state.
A number of drugs are known to lower vitamin C levels, requiring an increase in its intake. Estrogen-containing contraceptives (birth control pills) are known to lower vitamin C levels in plasma and white blood cells. Aspirin can lower vitamin C levels if taken frequently ie, 2 aspirin tablets taken every 6 hrs for a week has been reported to lower white blood cell vitamin C by 50%, primarily by increasing urinary excretion of vitamin C.
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