Nutrition plays a significant role in the prevention and treatment of common diseases. Some superb dietary choices such as functional foods and nutriments can surely help fight against certain diseases and provide various advantages to an individual's health. Plants have been regarded as a primary source of highly effective conventional drugs leading to the development of potential novel agents, which may boost the treatment. Growing demand for functional foods acts as an aid for the producers to expand in agriculture and pave the way for innovation and research by the nutraceutical industry. The given review highlights how various functional foods such as tomatoes, chocolates, garlic and flaxseed are currently being defined, their sources, benefit in treating various ailments and the challenges with their use.