The molar-like premolars, large molars, and long rooted cheeked teeth could point to chewing, crushing, and grinding of bulky and fibrous materials. Thick enamel would suggest a diet of abrasive items, such as dirt particles on food gathered near or on the ground (like bamboo shoots). Similarly, oxygen isotope analysis suggests "Gigantopithecus" consumed more low-lying plants such as stems, roots, and grasses than orangutans. Dental calculus indicates the consumption of tubers. "Gigantopithecus" does not appear to have consumed the commonplace savanna grasses (C4 plants). Nonetheless, in 1990, a few opal phytoliths adhering to four teeth from "Gigantopithecus" Cave were identified to have originated from grasses; though, the majority of phytoliths resemble the hairs of fig family fruits, which includes figs, mulberry, breadfruit, durian, and banyan. This suggests that fruit was a significant dietary component for at least this population of "Gigantopithecus".