Growing evidence indicates that diets built around plant foods can reduce the risk of type 2 diabetes and cardiovascular disease (CVD). Emphasizing vegetables, fruits, whole grains, beans, nuts, and seeds — while limiting red and processed meats — appears to improve multiple cardiometabolic risk factors and can, with careful planning, provide nutrition comparable to well-established healthy eating patterns.
What a plant-forward diet means
A plant-forward diet makes plants the main feature of meals. Vegetarian and vegan diets are examples, but the term also includes flexible patterns that still include some animal foods. The healthiest versions prioritize whole, minimally processed plant foods rather than highly processed meat substitutes and emphasize nutrient-dense choices recommended by organizations such as the American Heart Association.
Plant-based eating and diabetes prevention
Public interest in plant-based eating is rising: a 2025 poll found 65% of U.S. adults would consider a plant-based, low-fat diet if advised by a doctor, yet only about 1 in 5 respondents linked plant-based diets specifically with preventing or reversing type 2 diabetes. Clinical research offers supporting evidence. In a 22-week randomized trial comparing the American Diabetes Association (ADA) recommended diet with a low-fat vegan plan (without calorie or unprocessed-carb limits), 43% of participants on the vegan diet were able to reduce or stop diabetes medications versus 26% in the ADA group. Some observational analyses also suggest that animal-based low-carbohydrate patterns may be associated with higher diabetes risk compared with plant-forward approaches.
Practical steps dietitians recommend include gradual changes — for example, starting with one or two meatless days per week — and collecting simple, satisfying vegetarian recipes so plant dishes become the default over time.
Plant protein and heart disease risk
Long-term research looking at the balance of plant versus animal protein suggests heart benefits from shifting toward more plant protein. One analysis found the average American currently consumes roughly three times more animal protein than plant protein. Increasing the plant-to-animal protein ratio — for example moving toward at least a 1:2 ratio and ideally closer to 1:1.3 for coronary prevention — was associated with substantially lower CVD risk. These benefits are likely driven by replacing red and processed meats with plant proteins such as legumes and nuts, which deliver more fiber, unsaturated fats, antioxidants, vitamins, and favorable effects on inflammation, blood lipids, and blood pressure.
Can a plant-based diet match the Mediterranean diet nutritionally?
A modeling study published in late 2025 compared week-long, ~2,000-calorie menus and found that a carefully planned plant-based menu can meet most of the same nutrient targets as a typical Mediterranean-style omnivorous diet and may also lower environmental impact. Because this was a modeling exercise rather than a feeding trial, it shows what’s possible under ideal planning. In real life, cost, taste preferences, cooking skills, and availability of fortified or enriched foods can affect whether those nutrient targets are actually met. Registered dietitians recommend deliberate planning to prevent gaps in nutrients often supplied by animal foods — notably vitamin B12, iron, long-chain omega-3s, and in some cases vitamin D and calcium — and suggest consulting an RD when making major shifts.
Bottom line
You don’t need to become fully vegan to reap benefits. Increasing the share of plant foods in meals and substituting whole, minimally processed plant proteins for red and processed meats can lower risk factors for type 2 diabetes and cardiovascular disease, and — with appropriate planning — support adequate nutrition while reducing environmental impact. Small, sustainable steps such as adding regular meatless meals are an effective way to begin.
