Abstract: Individuals suffering from impaired masticatory function (MF) may adapt food consistency to their existing dental status or rely on the digestive system to compensate for the lack of oral preparation of food. These circumstances further leads to deficient nutrient intake or increase the likelihood of digestive diseases and decrease gut absorption. Dysfunction of masticatory efficiency thus may be detrimental to general health. This article reviews evidence of the effects of masticatory deficiency on nutrition. It is difficult to draw conclusions from many of the reviewed studies due to issues related to study design, confounding variables, and the subjective nature of the measurements. The reviewed evidences supporting an association between MF and deficient dietary intake often are based on relatively weak correlations and cannot confer a causal relationship between the reviewed variables.