Medications · Supplements
Vitamin E Before Surgery
Vitamin E is an antioxidant taken by many people — but in supplement doses it thins the blood, so it's one to pause before an operation.
The short answer
Why vitamin E matters before surgery
In supplement-strength doses, vitamin E reduces how well your blood clots, which can increase bleeding and bruising during and after surgery. The effect is stronger if you also take other blood-thinning supplements like fish oil, so teams ask you to pause high-dose vitamin E in advance.
When to stop
About 1–2 weeks before is the usual window — longer if a spinal or epidural is planned. A normal multivitamin generally doesn't need stopping, but standalone high-dose vitamin E does. Your team confirms the timing.
Frequently asked questions
How long before surgery should I stop vitamin E?
High-dose vitamin E supplements are usually stopped about 1–2 weeks before surgery, because they reduce the blood's ability to clot. Confirm the exact timing with your team.
Is the vitamin E in my multivitamin a problem?
The small amount in a standard daily multivitamin is usually fine. The concern is high-dose standalone vitamin E supplements. Mention your multivitamin to your team anyway so they can check the dose.
Why does vitamin E thin the blood?
In larger doses vitamin E interferes with platelets and clotting factors, which can add to bleeding during surgery — especially alongside other blood-thinning supplements like fish oil. That's why it's paused beforehand.