As the number of subjects choosing vegan diets increases, healthcare providers must be prepared to give the best advice to vegan patients during all stages of life. A completely plant-based diet is suitable during pregnancy, lactation, infancy, and childhood, provided that it is well-planned. Balanced vegan diets meet energy requirements on a wide variety of plant foods and pay attention to some nutrients that may be critical, such as protein, fiber, omega-3 fatty acids, iron, zinc, iodine, calcium, vitamin D, and vitamin B12. This paper contains recommendations made by a panel of experts from the Scientific Society for Vegetarian Nutrition (SSNV) after examining the available literature concerning vegan diets during pregnancy, breastfeeding, infancy, and childhood. All healthcare professionals should follow an approach based on the available evidence in regard to the issue of vegan diets, as failing to do so may compromise the nutritional status of vegan patients in these delicate periods of life.

A growing number of people are paying more attention to the concept of environmental sustainability, implementing sustainable eating practices to minimize the waste of resources, and the production of waste products related to the food production process. The careful application of sustainable eating practices makes it possible to help the environment, public health, and society by increasing the availability of food and farmland to feed every inhabitant on Earth. Individuals impact the environment through their eating because of three factors: food, energy used in the home, and transport. The most powerful of these factors is food. Animal food production involves a greater use of resources (raw materials, land, water, energy) and produces more pollutants (chemical residues from agriculture, greenhouse gases, manure) than plant-based food. Thus, a lifestyle based on eating plant foods is not only beneficial for the environment, but also protective of a consumer’s health. Alternative practices, such as using renewable energy sources or alternative fuels, however desirable they may be in combination with limiting the consumption of animal foods, are more difficult to implement across society. To change one’s eating habits is, on the other hand, a simple, fast, and inexpensive approach.

Food consumption is one of the major causes of climate change, resource depletion, loss of biodiversity, and other kinds of environmental impact by modern households. According to evidence, a global change in dietary habits could be the single most effective and rapid intervention to reduce anthropic pressure on the planet, especially with respect to climate change. Our study applied Life Cycle Assessment (LCA) to investigate the total environmental impact of two plant-based diets: the Mediterranean and the Vegan diets, according to relevant Italian nutritional recommendations. The two diets share the same macronutrient rates and cover all the nutritional recommendations. Calculations were made on the basis of a theoretical one-week 2000 kcal/day diet. According to our calculations, the Vegan diet showed about 44% less total environmental impact when compared to the Mediterranean diet, despite the fact that the content of animal products of the latter was low (with 10.6% of the total diet calories). This result clearly supports the concept that meat and dairy consumption plays a critical role, above all, in terms of damage to human health and ecosystems. Our study supports the thesis that even a minimal-to-moderate content of animal foods has a consistent impact on the environmental footprint of a diet, and their reduction can elicit significant ecological benefits.