Research
ZenMeals meals are built on published nutrition science, not trends. We looked at research on the Blueprint protocol, the Mediterranean diet, whole-food eating, dietary fibre, protein, legumes, fermented food, polyphenols, sulforaphane, olive oil, the gut microbiome, and ultra-processed food, and every claim below links to the actual paper, not a summary of it. ZenMeals is not affiliated with Bryan Johnson or Blueprint; we independently apply this research to our own recipes.
Blueprint protocol
Bryan Johnson's Blueprint protocol made popular the idea of eating one calorie-controlled, nutrient-dense meal early in the day, building on decades of research into calorie restriction. The largest human trial on this, CALERIE, followed healthy adults for two years on roughly 12% fewer calories than usual. Their cardiometabolic markers improved — LDL cholesterol, blood pressure, insulin sensitivity — with no harm to bone density or mood. It's the best controlled evidence we have for "eat less, but eat better."
Kraus WE, et al. "2 years of calorie restriction and cardiometabolic risk (CALERIE): exploratory outcomes of a multicentre, phase 2, randomised controlled trial." Lancet Diabetes Endocrinol. 2019. PubMed 31303390
Mediterranean diet
The Super Veggie's backbone is legumes, vegetables, and extra virgin olive oil, which puts it squarely inside the Mediterranean dietary pattern, probably the most tested diet in cardiovascular medicine. In the PREDIMED trial, close to 7,500 adults at high cardiovascular risk were split between a Mediterranean diet with extra olive oil or nuts, and a standard low-fat diet. After about five years, the Mediterranean group had roughly 30% fewer major cardiovascular events.
Estruch R, et al. "Primary Prevention of Cardiovascular Disease with a Mediterranean Diet Supplemented with Extra-Virgin Olive Oil or Nuts." N Engl J Med. 2018. PubMed 29897866
Whole-food plant-based
We lean plant-forward without being dogmatic about it. A 25-year study followed over 12,000 middle-aged US adults and found that eating more of an overall plant-based diet was linked to 16% lower risk of heart disease, about 31% lower cardiovascular death, and up to 25% lower death from any cause, compared with eating the least. That held whether or not people were strictly vegan.
Kim H, et al. "Plant-Based Diets Are Associated With a Lower Risk of Incident Cardiovascular Disease, Cardiovascular Disease Mortality, and All-Cause Mortality in a General Population of Middle-Aged Adults." J Am Heart Assoc. 2019. PubMed 31387433
Dietary fibre
Fibre might be the single most under-eaten nutrient in a typical Swiss diet. It's part of why the Super Veggie is built around lentils and cruciferous vegetables rather than, say, a smoothie. A large Lancet review of carbohydrate research found that people eating the most fibre had 15 to 30% lower rates of death from any cause and from cardiovascular disease, compared with people eating the least. The biggest benefit showed up above about 25 to 29 grams a day.
Reynolds A, et al. "Carbohydrate quality and human health: a series of systematic reviews and meta-analyses." Lancet. 2019. PubMed 30638909
Protein
Protein needs don't shrink as you get older. If anything they grow, because ageing muscle becomes more resistant to the protein you eat. A position paper from the international PROT-AGE study group recommends 1.0 to 1.2 grams of protein per kilogram of body weight per day for healthy older adults, well above the general adult guideline, specifically to protect muscle mass. It's part of why we don't treat protein as an afterthought in the Super Veggie.
Bauer J, et al. "Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group." J Am Med Dir Assoc. 2013. PubMed 23867520
Legumes
Black lentils make up more of the Super Veggie, by weight, than any other ingredient. Legumes as a category have a fairly consistent link to heart health in nutrition research: a meta-analysis of fourteen studies covering roughly 367,000 people found the highest legume intake linked to about 10% lower risk of both cardiovascular disease and coronary heart disease, compared with the lowest intake.
Marventano S, et al. "Legume consumption and CVD risk: a systematic review and meta-analysis." Public Health Nutr. 2017. PubMed 28077199
Fermented foods
We don't currently put fermented ingredients in the core Super Veggie or Nutty Pudding recipes, but the evidence for the category is strong enough that it shapes how we think about future ones. In a Stanford trial, people who ate a lot of fermented food — yogurt, kefir, kimchi, and the like — for ten weeks saw more diverse gut bacteria and lower inflammation markers. A high-fibre diet alone didn't produce the same effect over the same period.
Wastyk HC, et al. "Gut-microbiota-targeted diets modulate human immune status." Cell. 2021. PubMed 34256014
Polyphenols
Berries, cocoa, olive oil, and cherries in our recipes are all decent sources of polyphenols, plant compounds with antioxidant and anti-inflammatory effects. A 2024 meta-analysis pooling seven cohort studies and nearly 179,000 adults found that eating more dietary polyphenols was linked to a 7% lower risk of dying from any cause, with a clear dose-response relationship: more polyphenols, more benefit.
Zupo R, et al. "Dietary Intake of Polyphenols and All-Cause Mortality: A Systematic Review with Meta-Analysis." Metabolites. 2024. PubMed 39195500
Sulforaphane
Broccoli and cauliflower aren't in the Super Veggie for crunch. They're a source of glucoraphanin, the compound your body converts into sulforaphane, one of the most studied plant compounds in cancer-prevention research. The foundational study on this compound found that broccoli sprouts, just three days old, can carry 10 to 100 times more glucoraphanin than a mature broccoli head. The broccoli we cook with is mature, not sprouts, so it supplies meaningful but much smaller amounts — still worth having, just not at sprout-level concentration.
Fahey JW, Zhang Y, Talalay P. "Broccoli sprouts: an exceptionally rich source of inducers of enzymes that protect against chemical carcinogens." Proc Natl Acad Sci U S A. 1997. PubMed 9294217
Olive oil
Extra virgin olive oil is the primary fat in both ZenMeals meals, not a garnish. A meta-analysis of 32 cohort studies covering more than 840,000 people found that olive oil intake specifically, not monounsaturated fat from mixed sources in general, was linked to an 11% lower rate of all-cause mortality and a 12% lower rate of cardiovascular mortality. That's why we don't swap it for a cheaper neutral oil.
Schwingshackl L, Hoffmann G. "Monounsaturated fatty acids, olive oil and health status: a systematic review and meta-analysis of cohort studies." Lipids Health Dis. 2014. PubMed 25274026
Gut microbiome
What you eat changes your gut bacteria faster than most people expect. A controlled feeding study found that switching volunteers to an entirely plant-based or entirely animal-based diet measurably shifted their gut microbial makeup within one to two days, with the plant-based diet favouring bacteria that ferment fibre. It's a reminder that a meal like the Super Veggie does more than just supply the nutrients you absorb directly.
David LA, et al. "Diet rapidly and reproducibly alters the human gut microbiome." Nature. 2014. PubMed 24336217
Ultra-processed foods
This might be the most important citation on this page, because it explains why "healthy-sounding" packaged food often isn't. In a randomized inpatient trial, adults given free access to an ultra-processed diet spontaneously ate about 500 more calories a day and gained weight, compared with the same people on a minimally processed diet. Both diets were matched on paper for calories, sugar, fat, fibre, and other nutrients. It's some of the strongest evidence we have that how food is made, not just what's on the label, drives what and how much people eat.
Hall KD, et al. "Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake." Cell Metab. 2019. PubMed 31105044
Where this shows up in practice
See exact numbers per meal on nutrition information, read why we cite research this way on about ZenMeals, or order the Super Veggie and Nutty Pudding. If you have a question about a specific study, contact us, or check the FAQ first.