Integrating Nutrition into Mental Health Care: An Exploratory Cross-Sectional Survey of Training, Practices, Barriers, and Collaboration Among Mental Health and Nutrition Professionals

Background/Objectives: The integration of nutrition into the psychological sciences and mental healthcare has gained increasing attention with the emergence of Nutritional Psychology as an interdisciplinary field. However, little is known about how professionals approach this interface or the barriers they face. This study aimed to explore the extent to which mental health and nutrition professionals engage with each other’s domains. Methods: This cross-sectional study analyzed survey responses from 196 professionals, including mental health professionals, nutrition professionals, and individuals from related fields recruited through the individual and institutional professional network of the Center for Nutritional Psychology, San Jose, CA, USA. The goal was to examine training, practices, perceived barriers, and interest in collaboration between these professions. Descriptive statistics summarized categorical and quantitative variables. Mann–Whitney U tests with rank-biserial correlation examined ordinal data. Exploratory factor analysis (principal axis factoring, varimax rotation) was applied to barrier ratings. Results: A total of 78.3% of participating mental health professionals reported addressing nutrition in their practice at least occasionally, while a similar percentage (78.5%) of participating nutrition professionals discussed mental health with clients at least occasionally. Despite this engagement, 25% of all participating nutrition professionals and 51% of all participating mental health professionals reported no formal training in the complementary field, with most of their knowledge acquired informally through self-study or workshops. A total of 11 mental health professionals and 13 nutrition professionals did not answer the question about formal education in the complementary field. The highest-rated perceived barriers included a lack of training, unclear professional boundaries, and a lack of a common language, whereas a lack of evidence was perceived as the least critical. Importantly, 99% of respondents who answered the question (n = 84, while 112 participants did not respond), or 42% of all participants, expressed interest in evidence-based interdisciplinary training. A total of 96% of those who answered the question (n = 133, while 63 participants did not answer) or 65% of all participants agreed that collaboration would improve patient outcomes. However, only 49% of all participating nutrition professionals and 50% of all participating mental health professionals reported having collaborative experience. A total of 7 mental health professionals and 16 nutrition professionals did not answer the question about collaborative experiences. Conclusions: Within this self-selected sample, respondents reported frequent cross-disciplinary engagement, limited formal training, and interest in interdisciplinary education and collaboration. These exploratory findings require confirmation in independently recruited and better-characterized samples.