Vitamin E for Platelet Aggregation Reduction
High-dose vitamin E reduces platelet function but increases haemorrhagic stroke risk without cardiovascular benefit.
Overview
Verdict
How It Works
Dosing & Protocol
Typical dose
- Recommended dose
- Not recommended for this purpose
- Expected timeframe
- n/a
Protocol
- form
- Alpha-tocopherol; the RDA is 15 mg/day from diet
- duration
- Not applicable as an intended intervention
- co factor
- The pharmacology is real but the framing is wrong. Vitamin E inhibits protein kinase C in platelets, reduces thromboxane A2 generation and antagonises vitamin K-dependent clotting factor activation, producing measurable reductions in platelet aggregation at supplemental doses. This is why it is listed as a bleeding risk in surgical and anticoagulation guidance rather than as an antiplatelet therapy. It has never been shown to reduce thrombotic events - HOPE found no cardiovascular benefit and more heart failure - and the ATBC trial found an increase in haemorrhagic stroke among alpha-tocopherol recipients.
- titration
- Not applicable. The tolerable upper intake level is 1,000 mg/day, and bleeding risk rises with dose and with concurrent antiplatelet or anticoagulant drugs
- starting dose
- Not a therapeutic target. Platelet effects appear at 400 IU/day and above of alpha-tocopherol
Evidence
What the studies say
No studies are yet linked to both Vitamin E and Platelet Aggregation Reduction.
Safety
Caveats
Avoid doses above 400 IU/day, especially alongside anticoagulants.
Less likely to help if
Medical Disclaimer
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Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.