Based on the evidence available, taking vitamin E supplements may help modestly lower insulin levels, particularly in people with diabetes.

What the Research Says

According to Pillser's research database, there is 1 study — a 2023 systematic review and meta-analysis — that examined this relationship:

• 2023 Meta-Analysis (13 RCTs, n=2,171): This large analysis looked at the effect of vitamin E intake on glycemic control and insulin resistance in diabetic patients. Pooling results from 13 randomized controlled trials on fasting insulin showed a statistically significant reduction — a mean difference of -1.05 µIU/mL (95% CI: -1.53 to -0.58, p<0.001)¹.

The effect is categorized as beneficial but small in magnitude.

Summary

Metric	Finding
Number of studies	1 (meta-analysis of 13 RCTs)
Effect type	Beneficial
Magnitude	Small reduction (~1 µIU/mL)
Population studied	Diabetic patients

Important Considerations

1. Modest effect size: A reduction of about 1 µIU/mL in fasting insulin is statistically significant, but whether it is clinically meaningful depends on the individual's baseline insulin levels.
2. Study population: The evidence comes primarily from studies in people with diabetes. It's less clear how much vitamin E affects insulin levels in healthy individuals without insulin resistance.
3. Dosage: The specific doses used in the included trials varied; you can find more details on the individual study pages.

For further details, you can explore the full research page: Vitamin E and Reduced Insulin Levels².

Footnotes

1. "Effect of vitamin E intake on glycemic control and insulin resistance in diabetic patients: an updated systematic review and meta-analysis of randomized controlled trials" (2023), Pillser Research Database, Link. ↩

2. Pillser Research Database, Vitamin E and Reduced Insulin Levels. ↩