Does vitamin E lower cholesterol? Pooled across 22 trials, the vitamin E in most capsules did nothing for it. A rarer form called tocotrienol looked far better, and ten of its 16 comparisons come from just three trials

Vitamin E has been tried against heart disease for half a century, on a simple theory: cholesterol does its damage once it has been oxidised, and vitamin E is the antioxidant that sits inside the cholesterol particle. Whether a capsule actually changes the numbers on a blood test is a narrower question, and the trials that asked it have been small and have disagreed.

A team from universities in Iran and Ukraine has now pooled them. Their review, published in Food Science & Nutrition on 7 October 2026, kept 22 randomised trials in adults who already had raised cholesterol or triglycerides: 1,001 people, with doses from 55 to 1,043 IU a day, taken for between four weeks and a year and a half. The trials date from 1978 to 2020. The search ran to the start of 2026, so nothing newer turned up in six years.

The pooled results are modest. Triglycerides fell by 8.14 mg/dL more on vitamin E than on the comparison, and HDL, the 'good' cholesterol, rose by 1.08 mg/dL. Both pass the usual statistical test. Total cholesterol and LDL, the number most people are treated for, did not: LDL came out 9.06 mg/dL lower, with a range that runs from an 18.6 point drop to a slight rise. The authors are frank about what this adds up to. The changes, they write, 'may not translate into clinically meaningful reductions in cardiovascular risk'.

The part that will be quoted is the split by type. Vitamin E is a family. Tocopherols are the form in almost every capsule on a pharmacy shelf; tocotrienols are a rarer branch, sold as a speciality supplement. In the tocopherol comparisons, total cholesterol and LDL each ended a few points higher than on placebo, and HDL did not move. In the tocotrienol comparisons, LDL was 20 mg/dL lower and HDL 2.4 higher. If that held up, it would be a real effect for a supplement.

We went through the table of trials to see what the tocotrienol figure rests on. There are 16 tocotrienol comparisons, but ten of them come from three trials. One trial in Pakistan tested four doses against the same 18 people in a control group. Two American trials each tested three products against a single placebo group of 13 and of 17. The same placebo volunteers are being compared again and again, and the methods section does not describe any step to divide those groups up. The disagreement between the tocotrienol results is also about as large as the scale allows, 96% on the I² measure, which means some trials found a big drop and others found nothing. Fourteen of the 16 comparisons lasted eight weeks or less.

The paper also reports that lower doses and shorter trials did better, which sounds like two more findings. By our count they are mostly the same one. Thirteen of the 20 lower-dose comparisons and 14 of the 23 short ones are the tocotrienol arms again. Where the paper looks at trials of 12 weeks or more, the LDL difference is gone: 2 points in the wrong direction. And a second analysis in the same paper, a curve fitted to dose, is described as showing bigger effects at higher doses, the opposite of the subgroup result.

Then there is the triglyceride finding, the one the review grades as high certainty with 'no serious limitation' on any of five counts. The paper's own table of what happens when each trial is removed shows that leaving out one study, of 30 women with type 2 diabetes in Iran, shrinks the effect to 5.4 mg/dL with a range that includes zero. For HDL, removing any one of ten different comparisons does the same. Results that depend on a single small trial are not what most readers would understand by high certainty.

Our reading: for the ordinary vitamin E capsule, this is a fairly clear no on cholesterol. For tocotrienols it is an open question, not an answer, resting on a few hundred people in short trials, and the authors themselves call that comparison exploratory. It needs one decent-sized trial that runs for months and compares the two forms directly. Nobody with a cholesterol problem should read this as a reason to swap a prescribed medicine for a supplement, and the review says so too.