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A recent Stanford University study won’t end the raging war over what we should eat for optimal health, but it does give vegans a leg up.

Published in the medical journal JAMA Network Open in November, the first-of-its-kind study recruited 22 pairs of identical twins, split up by diet. In each twin pair, one was randomly assigned to eat a healthy vegan diet for eight weeks while the other was assigned a healthy omnivore diet that included meat, eggs, and dairy. Those in the vegan cohort ended the study with much better health outcomes, particularly lower fasting insulin and lower cholesterol — a key indicator for heart health.

While most nutrition research is published with little fanfare, the twin study has received outsize attention thanks to an accompanying Netflix documentary series — You Are What You Eat: A Twin Experiment — that follows the culinary journeys of four of the twin pairs participating in the study. It was released in early January — right in time for New Year’s resolutions — and quickly became one of the streaming platform’s most watched television programs in the US.

“Identical twins are the perfect natural experiment because each individual has identical genes in every cell of its body, so they are a perfect way to tell nature from nurture,” Tim Spector, a professor on twin research at King’s College London who was not involved in the study, said in the Netflix series. Researchers also noted that the twins said they had similar lifestyles and were raised in the same households.

The study results are in line with a large body of nutrition research on the benefits of healthy plant-based diets. But I worry its findings could be undermined by the sometimes oversimplified nutrition advice served up by the cast of mostly vegan advocates starring in You Are What You Eat. It’ll likely be effective in persuading a lot of its viewers to give plant-based eating a try, but in others, it could instill some skepticism.

What happens when you go vegan for two months

For the first four weeks of the Stanford study, each participant ate preprepared frozen meals; for the final four, they had to provide their own food following a few basic principles: Choose minimally processed foods and consume a variety of vegetables, starches, proteins, and healthy fats.

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Pam and Wendy, one of the twin pairs in the Stanford study and the accompanying Netflix series You Are What You Eat: A Twin Experiment. Netflix

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