Food waste has been a global and national problem in the Philippines that occurs at any given time in the retail or household level. Especially in a pandemic, the disruption of the economy would negatively affect the food accessibility and security of people to major food commodities such as Lacatan Banana (Musa acuminata – AA Group). The study aimed to evaluate the extent of the quantity, cost, and nutritional value lost from wasted Lacatan Banana in Santa Ana, Manila Public Market to assist the retailers in assessing efficient measures to reduce or use the food waste in the area and promote sustainability. A qualitative research design was used to obtain the details on the banana wasted and the drivers of fruit wastage in a public market. Data were gathered through key informant interviews, direct observations, and document reviews. Results showed that approximately 1 – 4 kg were lost per month. It was calculated that this was equivalent to a cost of PHP 150 – 350 per month from Lacatan Banana wastes where at least 1 – 8 people could have utilized its nutritional benefits for fiber, potassium, magnesium, vitamin c, and kilocalories. However, findings showed that there were no problems for the waste management of the public market. The participants were aware of the concept of food waste wherein retailers opted to donate the overripened banana or cook banana cakes. Overall, the participants’ wastage system and its use of resources promoted efficiency and sustainability that may be used as a framework for future research.