Can I Take These?

Can You Take Levothyroxine and Vitamin C Together?

No documented interaction was identified between vitamin C and levothyroxine in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

See the full Levothyroxine page and Vitamin C page for other reviewed interactions and reference information.

What the interaction means

Vitamin C's NIH fact sheet states its only documented medication-interaction concerns are with radiation therapy, chemotherapeutic agents, and statins; it does not mention levothyroxine. This project's existing published content on levothyroxine, drawn from levothyroxine's own authoritative sources (which document interactions with calcium, iron, and other minerals), does not document an interaction with vitamin C or ascorbic acid.

No documented interaction was identified in the authoritative sources reviewed. This is not a guarantee that no interaction exists for every dose, formulation, or individual -- it means the sources checked did not document one.

Practical context

Vitamin C's own current authoritative fact sheet was checked directly, in full. This catalog's existing sourced content for levothyroxine was also checked for any mention of vitamin C or ascorbic acid; none was found.

What the sources say

Vitamin C — Health Professional Fact Sheet — NIH Office of Dietary Supplements

Last reviewed 2026-08-24

Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.

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