The Academy of Nutrition and Dietetics has released its 2025 position paper affirming that well-planned vegetarian and vegan dietary patterns are nutritionally adequate for adults and can offer significant health benefits. These diets, when tailored appropriately, not only support long-term well-being but also play a valuable role in the prevention and management of chronic diseases such as cardiovascular disease (CVD) and type 2 diabetes.
A Closer Look at the Academy’s Position
The paper confirms that vegetarian dietary patterns — which exclude meat, poultry, and seafood — and vegan dietary patterns — which exclude all animal-derived foods — can meet all nutritional needs when thoughtfully constructed. Registered Dietitian Nutritionists (RDNs) and Nutrition and Dietetics Technicians, Registered (NDTRs), are encouraged to work closely with clients to design balanced, culturally sensitive meal plans that promote health while addressing potential nutrient gaps.
Health Benefits Backed by Evidence
According to the Academy’s systematic review of recent studies, moderate-quality evidence links vegetarian and vegan diets to:
- Lower incidence of cardiovascular disease
- Reduced body mass index (BMI)
- Improved blood pressure and cholesterol levels
- Better glycemic control in adults with type 2 diabetes
Additionally, these dietary patterns may reduce the need for diabetes medications, though evidence on this point remains limited.
Addressing Nutritional Concerns
While vegetarian and vegan diets can support overall health, the paper highlights certain nutrients that require attention:
- Vitamin B12: Often deficient in vegan diets; supplementation is strongly recommended.
- Vitamin D: Levels may be lower, particularly in winter; fortified foods or supplements may be necessary.
- Iron: Plant-based iron is less bioavailable; pairing with vitamin C-rich foods can aid absorption.
- Calcium: Particularly a concern for vegans; calcium-rich plant foods and fortified products are essential.
- Iodine & Choline: Intake may be low; seaweed, iodized salt, and diverse plant sources can help.
The paper stresses that these risks can be managed through careful dietary planning and, when needed, supplementation.
Emphasizing Diet Quality
A critical message of the paper is that not all plant-based diets are inherently healthy. The Academy uses the Plant-Based Diet Index (PDI) to distinguish between:
- Healthful PDI (hPDI): Diets rich in whole foods like fruits, vegetables, legumes, whole grains, nuts, and seeds.
- Unhealthful PDI (uPDI): Diets dominated by refined grains, sugary beverages, and ultra-processed plant-based products.
Higher hPDI scores are associated with reduced risk of CVD, obesity, and type 2 diabetes, while uPDI scores are linked to negative health outcomes.
Protein and Nutrient Considerations
Contrary to outdated perceptions, plant-based proteins — especially soy, lentils, tofu, and whole grains — can meet essential amino acid needs. The Academy notes that active adults and older individuals can build and maintain muscle with plant-based proteins when total intake is sufficient (e.g., 1.0–1.5 g/kg body weight/day).
The paper also addresses the role of omega-3 fatty acids, advising that regular consumption of ALA-rich foods (flaxseed, chia seeds, walnuts) may be sufficient, but algal DHA/EPA supplements can be considered when needed.
Tailored Support for Specific Populations
The Academy outlines practical recommendations for supporting various adult populations:
- Older Adults: Require higher protein and calcium; vegetarian diets may protect against frailty, cognitive decline, and sarcopenia.
- Low-Income Groups: Plant-based diets can be affordable and health-promoting; food assistance programs should include vegetarian options.
- Culturally Diverse Communities: RDNs are urged to provide culturally relevant guidance that respects traditional foodways and addresses acculturative dietary changes.
The Growing Role of Plant-Based Products
The market for plant-based meat and dairy alternatives is expanding rapidly. While these products can be convenient and beneficial, the Academy advises moderation and label reading, as some alternatives are high in sodium, saturated fat, and additives.
Dietitians are encouraged to help clients balance whole foods with convenient products and advocate for healthier formulations of processed vegetarian foods.
Policy Implications and Future Research
The Academy calls for policies that support equitable access to plant-based foods in schools, hospitals, and federal nutrition programs. It also highlights significant research gaps — particularly in understanding the nutritional status of different vegetarian subgroups and the health effects of newer plant-based food products.
Conclusion
Vegetarian and vegan diets, when planned well, offer a powerful tool for improving adult health and managing chronic disease risk. However, these benefits are maximized when the focus shifts from simply removing animal products to building nutrient-dense, balanced, and personalized eating patterns.
With growing consumer interest, expanding food options, and a supportive evidence base, dietitians are uniquely positioned to lead the way in integrating plant-based nutrition into individual care and public health strategy.
More information:
https://www.jandonline.org/article/S2212-2672(25)00042-5/fulltext
https://linkinghub.elsevier.com/retrieve/pii/S2212-2672(25)00042-5
