An insightful article by Sadhguru Jaggi Vasudev on the link between mental health and food... The Link Between Food and Mental Health Religious philosophies and Ayurvedic medical philosophies in India have also linked fresh vegetarian food with the quality of Sattva. Sattva in turn is associated with happiness, peace, harmony, creativity, and positivity. Nonvegetarian food on the other hand is associated with the qualities of Rajas and Tamas, which in turn are qualities associated with mental agitation and restlesness, depression and sadness, respectively.