The medicinal plant diet is a healing process used in traditional Amazonian medicine (TAM), and it is poorly described within the scientific literature. This work analyzes the experience of seven participants in this therapy performed at the Takiwasi Center in Peru. Semistructured interviews were performed before and after treatment, documenting participants’ motivation, psychological experience, and perceived personal changes (physically, psychologically, socially, and spiritually), as well as the role played by each medicinal plant. All the interviews were recorded, transcribed, and analyzed using interpretative phenomenological analysis. Reasons to participate in the plant diet included self-discovery, personal development, interest in plant medicine, and professional realization. The experience was perceived as intense and allowed participants to experience self-acceptance, self-discovery, mental balance, rest, cleansing, and connection with nature. Three months after the experience, participants felt physical changes (n = 6), psychological changes (n = 7), social changes (n = 5), and spiritual changes (n = 5).