Biofortified Yellow-Fleshed Potatoes Provide More Absorbable Zinc than a Commonly Consumed Variety: A Randomized Trial Using Stable Isotopes in Women in the Peruvian Highlands.

What Was Tested

Researchers studied Vitamin D, K2, Magnesium and Zinc in this randomized controlled trial publication.

The purpose of this study was to measure fractional and total zinc absorption from a test meal of biofortified compared with regular potatoes.

Urine samples were collected to determine fractional and total zinc absorption.

Who Took Part

According to the abstract, 37 women were involved.

PubMed tags the participants as women only.

How the Study Was Run

In design terms this was a randomized, single-blind and crossover study.

Random assignment meant chance, not the researchers, decided who got Vitamin D, K2, Magnesium and Zinc and who got the comparison, which limits bias.

Only one side, usually the women, was kept unaware of whether Vitamin D, K2, Magnesium and Zinc was given.

Each person switched between Vitamin D, K2, Magnesium and Zinc and the comparison at some point, usually with a gap in between.

What Was Measured

PubMed files the paper under topics including Zinc, Solanum tuberosum, Peru, Food, Fortified, Malnutrition and Isotopes.

Author keywords: biofortified crops, potatoes, stable isotopes and zinc absorption.

What This Means in Plain Language

The paper is a randomized, single-blind and crossover study of Vitamin D, K2, Magnesium and Zinc in 37 women.

With fewer than 40 people, it is a small study, so it is better read as an early signal for further research than as a settled answer.

Results are reported in around 6 sentences of the abstract; we leave them to the paper itself rather than summarise them.

The publication is from 2023 (The Journal of nutrition), a journal based in United States.

More context: the Vitamin D, K2, Magnesium and Zinc compound page, all human trials.