University of Leicester Launches Year-Long Clinical Trial on Plant-Based Diets

According to Diabetes Times, the University of Leicester has launched the "Plant Your Health" study through its Leicester Diabetes Centre, bankrolled by a £1.95 million grant from the Chellaram Foundation. It's a 12-month randomised trial built to evaluate the health effects of going vegetarian or vegan among younger adults carrying extra weight.

How the trial actually works

This isn't a food diary or an observational survey. It's a randomised controlled trial — clinical research gold standard — with three arms: a vegetarian diet (no meat or fish, dairy and eggs stay on the menu), a strict vegan diet, and a control group sticking with their usual plate.

Over 12 months, researchers will measure LDL-cholesterol, blood pressure, blood glucose, body composition, psychological wellbeing, and even dietary carbon footprint. That last one is the sustainability hook woven straight into a clinical outcomes design — a smart move if you actually want policymakers to pay attention when the numbers land.

Professor Tom Yates told the outlet the study "would suit anyone who has been wondering whether ditching meat could be beneficial to their health, and is happy to commit to changing their diet for 12 months." Note that word: commit. This is the part nobody on Instagram romanticises.

What participants actually get

Here's where most "life-changing" diet studies quietly collapse — adherence. Twelve months on a diet you didn't choose is brutal. So the team is stacking the support deck: supermarket vouchers to cover food costs, regular dietitian check-ins, cooking classes, and full health screenings at study visits.

Lead Dietitian Professor Louise Goff summed up the gap honestly: "Although we know plant-based nutrition provides health benefits over the short term, there are lack of well conducted research studies over the longer-term in sufficient numbers." She's billing Plant Your Health as "the largest trial on plant-based nutrition to date."

Who's eligible — and what's the angle

The recruitment window: adults 18–50, living with overweight or obesity, eating meat at least five days a week. Both self-referrals and primary-care invitations are open.

Professor Kamlesh Khunti, co-leading the trial alongside Yates, framed the goal as producing "globally relevant evidence that informs public health policy, dietary guidelines, and supports healthier, more sustainable nutrition at the population level." The Chellaram Foundation called the work "an essential step in understanding how compassionate food choices can create a more sustainable world" — corporate phrasing, sure, but the funding is real and the design looks rigorous.

What to actually watch

Bottom line: results aren't due until late 2027. If the LDL and glucose numbers move the way smaller studies hint, expect the next round of national dietary guidelines to lean noticeably harder on plant-forward eating — and expect food labels to start shouting about plant-based everything on the back of it. That's where this gets commercially interesting.

If you're in the eligible window and genuinely want to find out what your biology does without meat for a year, doing it inside a supervised clinical trial beats a wellness influencer cleanse by miles.