1. Vitamin E toxicity
Domina Petric, MD

2. Vitamin E toxicity
Vitamin E is one of the least toxic of the vitamins.
Daily doses as high as 400 IU can be considered harmless.
Large oral doses as great as 3200 IU have not been found to have consistent ill effects.
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

3. Vitamin E toxicity
At very high doses, however, vitamin E can antagonize the functions of other fat-soluble vitamins.
This can be antagonised with increased dietary supplements of the appropriate vitamins: vitamins D, A and K.
Isolated reports of negative effects in patients consuming up to 1000 IU of vitamin E per day included headache, fatigue, nausea, double vision, muscular weakness, mild creatinuria and gastrointestinal distress.
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

4. Fat soluble vitamins Vitamin K Vitamin E Vitamin A Vitamin D
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

5. Vitamin E toxicity DOUBLE VISION MUSCULAR WEAKNESS HEADACHE FATIGUE
NAUSEA
The least toxic of vitamins
Individual cases
Vitamin E intoxication
DOUBLE VISION
MUSCULAR WEAKNESS
Dose >1000 IU/day
CREATINURIA
GASTROINTESTINAL DISTRESS
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

6. Vitamin E toxicity
Potentially deleterious metabolic effects of high level vitamin E status include inhibitions of retinyl ester hydrolase and vitamin K-dependent carboxylations.
Patients of normal coagulation status given high doses of vitamin E (at least 1000 IU/day) showed decreased γ-carboxylation and decreased functionality of prothrombin.
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

7. Vitamin E toxicity
Tocopherylquinone has structural similarities to vitamin K and may act as an inhibitor of vitamin K metabolism.
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

8. Conclusion
Vitamin E is safe over a wide range of intakes that would extend to approximately 1600 IU/day for most healthy adults.
November 17, 2018
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc

9. Literature
Combs GF. The Vitamins. Fundamental Aspects in Nutrition and Health. Elsevier Inc
November 17, 2018