A main current trend is healthy lifestyle and the consumption of fruit and vegetables. The assessment of healthiness of plant-based diet is not so obvious either among the population or food experts. In an online survey the knowledge, beliefs and misbeliefs about plant-based diet were analysed among members and non-members of online social media lifestyles groups. All in all, it can be stated that there are no significant relationships and differences between knowledge, attitude and perception of members and non-members. Social media users are aware of the different types of plant-based diet (vegetarian, vegan) and the positive and negative psychological effects. The associations connected to plant-based diet are the following: healthy, environmentally friendly and expensive. Only a small segment of Hungarian people follow plant-based diet. At the same the diverse and everyday consumption of fruit and vegetables is essential because of health and sustainability issues. Due to conscious nutrition and more plant-based diet, people can contribute to the protection of their own health and the Earth.

JEL Classification: M31