Modeling Dairy-Free Vegetarian and Vegan USDA Food Patterns for Nonpregnant, Nonlactating Adults.

Background: The 2020-2025 Dietary Guidelines for Americans (2020 DGA) recommend 3 dietary patterns for Americans, including a Healthy Vegetarian Dietary Pattern (HVDP).

Objectives: The objective of this study was to assess whether nutritionally adequate dairy-free and vegan adaptations to the HVDP can be modeled with foods already in the DGA.

Methods: Using similar food pattern modeling procedures as the 2020 DGA, the nutrient composition of 2 alternative models-dairy-free and vegan-of the 1800-, 2000-, 2200-, and 2400-kcal/d HVDPs was assessed. The dairy food group was replaced with a dairy alternative group comprised of soy milk and soy yogurt fortified with calcium, vitamin A, and vitamin D. For the vegan model, eggs were replaced with equal proportions of vegetarian protein foods.

Results: Dairy-free and vegan models required minimal changes to the HVDP. Cup-equivalents and/or ounce-equivalents of vegetables, fruits, grains, oils, and discretionary calories remained unchanged. Content of total fat, polyunsaturated fat, linoleic acid (18:2n-6), linolenic acid, iron, copper, vitamin D, riboflavin, vitamin B-12, and vitamin K increased in both models by ≥10% (all comparisons relative to the original HVDP). Choline increased ≥25% in the dairy-free models. Protein decreased 11% in both 1800-kcal/d models and 10% in both 2000-kcal/d models. Sodium, cholesterol, zinc, and phosphorus decreased across all energy levels in both models, and selenium decreased in the vegan model. Carbohydrate, fiber, saturated fat, EPA, DHA, calcium, magnesium, potassium, vitamin A, vitamin E, vitamin C, thiamin, folate, and vitamin B-6 changed ≤10%. Both models contained adequate nutrients to meet Dietary Reference Intakes (DRIs) for most age and sex groups for which 1800-, 2000-, 2200-, and 2400-kcal/d diets are appropriate. Zinc was the only nutrient below the DRI for males.

Conclusions: The dairy-free and vegan HVDP models could help adults who do not consume dairy foods and/or other animal products to meet nutrition recommendations.