Is Vitamin C (Ascorbic acid) Safe with Oral contraceptives?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Maintain adequate Vitamin C intake through diet (citrus fruits, bell peppers) or supplement with 250–500 mg daily. High-dose Vitamin C supplements (1000 mg+) taken with the pill may transiently increase estrogen levels and should be timed carefully.
Why this interaction occurs
Estrogen in oral contraceptives competes with Vitamin C for transport mechanisms, and OCP use has been associated with lower plasma ascorbic acid levels. Conversely, high-dose Vitamin C may inhibit estrogen sulfation, potentially raising circulating estrogen and increasing side effect risk.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 22,854 reports mentioning Oral contraceptives. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Oral contraceptives + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Vitamin C (Ascorbic acid) interactions → · All Oral contraceptives interactions →
Already checked this one — check your whole list
Educational only — not medical advice.
Always confirm with your doctor or pharmacist.