in human skeletal remains are assumed to have formed in equilibrium with body water, thus providing a species-specific relationship to oxygen isotopic composition of body water. The same cannot be said for human bone collage, as δ18O values in collagen seem to be impacted by drinking water, food water, and a combination of metabolic and physiological processes. While δ18O values from bone minerals are essentially an averaged isotopic signature throughout the entire life of the individual, dental enamel reflects isotopic signatures specific to early life since enamel is not biologically remodeled. While carbon and nitrogen are used primarily to investigate the diets of ancient humans, oxygen isotopes offer insight into body water at different stages in a consumer's life. δ18O values are used to understand drinking behaviors, animal husbandry, and track mobility. 97 burials from the ancient Maya citadel of Tikal were studied using oxygen isotopes. Results from tooth enamel identified statistically different individuals, interpreted to be individuals from Maya lowlands, Guatemala, and potentially Mexico. Historical context combined with the isotopic data from the burials is used to argue that migrant individuals were a part of lower and higher social classes within Tikal. It is further suggested that the female migrants who arrived in Tikal during Early Classic period could have been the brides of Maya elite. Sulfur The sulfur stable isotope system is based on small, mass-dependent fractionations of sulfur isotopes in an analyzed material. These fractionations are then reported relative to Canyon Diablo Troilite (V-CDT), the agreed upon standard for the field. The ratio of the most abundant sulfur isotope, 32S, compared to rarer isotopes such as, 33S, 34S, and 36S, is used to characterize biological signatures and geological reservoirs. The fractionation of 34S (δ34S) is particularly useful since it is the most abundant of the rare sulfur isotopes, allowing the fractionations to be biogeochemically meaningful and analytically resolvable. This system is less commonly used on its own and typically acts as a secondary source of information that complements isotopic values of carbon and nitrogen. In bioarchaeology, the sulfur system has been used to investigate consumer paleodiets and spatial behaviors through the analysis of hair and bone collagen. Dietary proteins incorporated into living organisms tend to determine the stable isotope values of their organic tissues. Methionine and cysteine are the two canonical sulfur-containing amino acids. Of the two, δ34S values of methionine are considered to better reflect isotopic