Cambodia is experiencing the fastest rate of deforestation in Southeast Asia. Deforestation is not only a driver of biodiversity loss and climate change, but macroscopic analyses have indicated that it may also be closely related to the nutritional status of the local people. We initiated a study to examine the relationship between children's nutritional intake and livelihood activities in Prey Lang Wildlife Sanctuary, Stung Treng Province, Cambodia, in order to determine whether forest conservation activities also contribute to improving children's nutrition. In February 2020, we recruited 161 children (age: 5-11) living in the study area and surveyed their food intake (24-hour recall) and the source of each food item. Our preliminary results show that many children did not meet the Recommended Dietary Allowance (RDA) of many nutrients, and there was a serious deficiency of some minerals and vitamins. The sufficiency of nutrients in most children dropped below RDA level when purchased food was removed. A drop in sufficiency of macronutrients and some minerals and vitamins was observed when self-produced food was removed, while the impact of removing wild food and food sharing was small.