Vegan diet study finds a muscle trade-off in seniors, cancer data a win
A 12-week Dutch trial found an unsupervised vegan diet measurably shrank older adults' thigh muscle compared with an omnivorous diet, a loss resistance training mostly reversed.
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A 12-week Dutch trial found an unsupervised vegan diet measurably shrank older adults' thigh muscle compared with an omnivorous diet, a loss resistance training mostly reversed [4].
02
A meta-analysis of seventeen studies found vegans have 23% lower total cancer risk than non-vegetarians, with the sharpest drops in stomach and colon cancer [24].
03
Amsterdam UMC researchers built a week of fully plant-based hospital menus to meet the Netherlands' 2030 mandate that 40% of hospital protein come from plants [62].
04
The Apparel Impact Institute is folding its carbon and energy benchmark tool into Worldly's factory-tracking software, sharpening the emissions data behind wool, leather, and fiber sourcing claims [58].
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A meta-analysis of nearly 850,000 people found diets built on whole plant foods cut coronary heart disease risk 23%, while diets heavy on refined plant foods raised it [11].
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The Stories: the day’s biggest developments, in the sources’ own words
01▬Research & NutritionStory
Wageningen trial finds vegan diet shrinks muscle in seniors unless they lift weights
MART PRODUCTION (via Pexels)
A 12-week randomized trial from Wageningen University put 72 healthy adults over 65 on a self-chosen vegan diet, their normal omnivorous diet, or a vegan diet paired with resistance training, then tracked their thigh muscles by MRI [4]. The unsupervised vegan group's protein intake fell hard, and their thigh muscle volume and lean mass shrank significantly more than the omnivorous group's, with measurably lower muscle protein synthesis [4]. Adding resistance training to the same vegan diet substantially narrowed that loss, closing most of the gap [4].
By the numbers
72healthy adults 65 and older split into vegan, omnivorous, or vegan-plus-resistance-training groups for 12 weeks [4]
-27.7 g/ddrop in the unsupervised vegan group's protein intake in week 1, versus no significant change for omnivores [4]
-0.61 Lthigh muscle volume lost by the unsupervised vegan group, versus -0.01 L for omnivores and -0.35 L for vegans who also lifted weights [4]
FromPrimary Sources
02▲Research & NutritionStory
Meta-analysis finds vegan diets cut total cancer risk 23%
Wikimedia Commons / Vegetable
A systematic review and meta-analysis of seventeen publications, seven of them prospective cohort studies, found vegetarians had a 13% lower risk of total cancer than non-vegetarians, and vegans had a 23% lower risk [24]. Vegetarians also showed a sharply lower risk of stomach and colon cancer, with smaller but still significant drops for pancreatic and bladder cancer [24]. Using World Cancer Research Fund criteria, the researchers rated the evidence for vegetarian diets and total, colorectal, colon, and breast cancer as "probable" [24].
By the numbers
23%lower total cancer risk for vegans versus non-vegetarians, pooled across three studies [24]
13%lower total cancer risk for vegetarians versus non-vegetarians, pooled across four studies [24]
45%lower stomach cancer risk for vegetarians versus non-vegetarians [24]
FromPubMed
03▲Wins & CultureStory
Dutch hospital team designs a week of vegan meals to meet 2030 mandate
Photo: plant based news
A 16-person team of chefs, dietitians, and researchers at Amsterdam UMC spent April through December 2025 testing forty recipes and built a seven-day, fully plant-based hospital menu, publishing the results in the European Journal of Nutrition in June [62]. The dishes include a soy quark bowl, chickpea curry, and an eggplant pilaf with bean cassoulet, designed to hit real protein targets at a workable cost [62]. The Netherlands' Green Deal on Sustainable Healthcare requires hospitals to reach a 40/60 ratio of animal to plant protein by 2030, and the researchers call their menu a "practical blueprint" for getting there [62].
“This study demonstrates that fully plant-derived meals can provide adequate protein, be palatable, cost-effective, and feasible for clinical implementation.”
Amsterdam UMC-led research team, in the European Journal of Nutrition · [62]
By the numbers
90-97gprotein delivered per day by the seven-day plant-based menu [62]
€10.50-€12.30daily cost per patient for the fully plant-based menu [62]
22%cut in food emissions across 35 Sodexo-run UK hospitals after making plant-based the default option [62]
FromPlant Based News
Worth Knowing
Wins & Culture
Try the baby potato and jackfruit tagine from The Vegan Middle Eastern Cookbook: jackfruit stands in for chicken, brightened with preserved lemons, olives, and dried apricots [63].
Research & Nutrition
A dose-response meta-analysis of 221,380 adults found high adherence to plant-based diets cut the risk of cognitive impairment and dementia by 26% [29].
A meta-analysis of seven clinical trials found plant-based diets lower C-reactive protein, a marker of chronic inflammation, though the trial evidence is still thin [25].
A four-university crossover study found recreational runners and lifters saw no meaningful drop in performance after four weeks on a plant-based diet [30].
A crossover trial found swapping red meat for plant-based meat lowered TMAO, a cardiovascular risk marker tied to red meat, within days [26].
A crossover feeding trial found a whole-food, plant-based diet cut LDL cholesterol nearly 18% in adults with a genetic high-cholesterol disorder, versus a standard American diet [19].
A UK choice study found meat-eaters picked plant-based meals far more often when menus paired "Falafel Burger" with "Chicken Pie" instead of "Beef Burger" [27].
A six-week trial found a vegan Mediterranean diet outperformed a standard Mediterranean diet at cutting LDL cholesterol and pain in women with fibromyalgia [16].
A 12-week trial found a high-protein, partly plant-based diet improved memory and processing speed in adults with overweight and prediabetes [21].
A crossover trial found a pulse-based diet beat a matched lean-pork diet on iron status and visceral fat in adults over 60, with both diets improving cholesterol [18].
A 4-month trial found a vegan multinutrient supplement reversed a decline in omega-3 and vitamin D levels seen in unsupplemented young vegans [13].
Activism & Animals
A Zambian NGO's interviews with 302 imprisoned wildlife traffickers found opportunity, not organized crime, drove most of them into poaching pangolins and elephants [60].
One Good Thing
Gastroenterologist Will Bulsiewicz spent his medical fellowship succeeding on paper and miserable in real life: fifty pounds overweight, bloated, running on fast food and broken sleep [64]. On his Gut Insiders podcast, he tells the Physicians Committee's Chuck that what actually turned things around was treating his gut as part of the conversation instead of blaming his brain alone, and that eating for plant diversity, thirty different plants a week, was the piece that stuck [64]. He is no purist about it either: he says antidepressants have saved lives and belong in the toolkit too, alongside the beans [64].
