Vegan multinutrient supplement (26 µg vitamin D) plus omega-3 capsules with 36 or 72 µg vitamin D vs placebo in healthy vegan adults, 4 months
Zerback T et al. Vegan multinutrient supplementation significantly increases Omega-3 index and 25-OH-vitamin D status: a randomized, double-blind, placebo-controlled trial in healthy young vegans. Prostaglandins, leukotrienes, and essential fatty acids, 2026. PubMed 42480243 · DOI
- Design
- Randomized, double-blind, placebo-controlled trial, 3 arms (single dose, double dose, placebo)
- Population
- 72 healthy vegan adults aged 19 to 57 years. Setting not stated in the abstract; the trial is registered in the German Clinical Trials Register (DRKS00028151).
- Intervention
- A vitamin and mineral supplement providing 26 µg vitamin D, plus an omega-3 supplement in a single dose (EPA 98.7 mg, DHA 171.0 mg, additional vitamin D 36 µg, vitamin E 3.7 mg) or a double dose (EPA 197.4 mg, DHA 342.0 mg, additional vitamin D 72 µg, vitamin E 7.4 mg).
- Dose as studied
- Vitamin D 26 µg from the multinutrient plus 36 µg (single dose) or 72 µg (double dose) with the omega-3 supplement; dosing frequency not stated in the abstract.
- Comparator
- Placebo capsules
- Duration
- 4 months
Outcomes, as reported
- 25-hydroxyvitamin D Declined on average in the placebo group. Increased significantly in both supplement groups compared with placebo (p < 0.001). The double dose gave numerically larger increases than the single dose, but the difference between doses was not statistically significant.
- Omega-3 index Declined on average in the placebo group. Increased significantly in both supplement groups (p < 0.001). The difference between the two doses was not statistically significant.
- Vitamin E Unchanged, as expected; the authors state it was included only as an antioxidant in the omega-3 supplement.
Clinical endpoints were not evaluated. The authors note that improved nutrient status may have implications for health but did not measure them.
Not stated in the abstract.