Theoretically, eating alone may cause depression in two ways: through reduced social interactions or through insufficient nutrition. Some studies have suggested that eating with others affords the opportunity to socialise. For example, Vesnaver and Keller [3] indicated that eating with others affords older adults a sense of belonging to the community, social support and increased enjoyment of food. Vailas et al. [4] found that food enjoyment is important for older adults' quality of life. These findings suggest that for older adults who are retired or bereaved, mealtimes may offer important communication opportunities. Eating alone may deprive people of social interactions and enjoyment, which is detrimental to mental health.