The paper reports some of the essential works done on the utilization of sensors for the detection of food intake. Due to the health problems currently faced by the modern world, the detection of food intake has become one of the essential sectors where the researchers are getting invested. Because of the alteration in food quality, the imbalance caused in life due to personal and professional pressure, and transmission of new diseases as epidemics, the knowledge about the amount of food intake and time taken to consume the same has become essential to maintain a healthy life. Wearable and non-wearable sensors hold a pivotal role in monitoring the activities associated with food intake due to their quick response, simple operating principle, and the ability to provide instant feedback to the individual. This paper exhibits certain experiments done by the researchers using sensing prototypes to monitor individuals eating food under controlled conditions. It compares certain prototypes attached to the different parts of the body, as well as explains some of the challenges related to the current sensors. Finally, the current and future market survey is also outlined in the paper.