Long John Baldry faced significant mental health issues during the 1970s, primarily depression, which was exacerbated by his collapsing career and the failure of his 1973 album "Good to Be Alive." He also suffered from drug and alcohol addiction, and bulimia. Baldry was institutionalized for a brief time in 1975 due to his mental health problems. Despite these struggles, he continued to contribute to the music industry and was known for mentoring many artists. For more detailed information, you can refer to his Wikipedia page or read about his life and struggles in articles such as Louder Sound and GayCultureLand.