High-value yak meat from Qinghai-Tibet Plateau was investigated using stable isotopes (δ¹³C, δ²H, δ¹⁸O, δ¹⁵N and δ³⁴S) to identify attributes which could verify and protect its geographical origin. Supervised PLS-DA was applied to the isotope data to discriminate four geographical locations. δ¹³C, δ²H, and δ¹⁸O values showed significant differences according to origin while δ¹⁵N and δ³⁴S values did not show any change across the different regions. Isotope values of different body tissues from the same animal showed no statistical difference for the five stable isotopes. In addition, the δ²H and δ¹⁸O values of defatted yak meat was highly correlated to farm altitude and associated drinking water. This yak meat traceability method is particularly useful to protect the Product of Geographical Indication (PGI) status of Gannan yak meat and verify the farming origin of yak meat sold in markets for food safety purposes, especially when excessive hormones, pesticides or heavy metals are found.

使用稳定的同位素从青藏高原高价值牦牛肉进行了研究（δ ¹³ C，δ ² H，δ ¹⁸ O，δ ¹⁵ N和δ ³⁴ S），以确定其可以验证和保护其地理来源属性。将监督的PLS-DA应用于同位素数据以区分四个地理位置。δ ¹³ C，δ ² H，和δ ^18个O值根据原点而显示显著差异δ ¹⁵ N和δ ³⁴S值在不同区域之间没有显示任何变化。来自同一只动物的不同身体组织的同位素值对于这五个稳定同位素没有统计学差异。此外，δ ² H和δ ^18个脱脂牦牛肉的O值呈高度相关，以农场高度和相关联的饮用水。这种牛肉可追溯性方法对于保护甘南牛的地理标志产品（PGI）状态和验证出于食品安全目的在市场上出售的牛肉的农业起源特别有用，特别是当发现过量的激素，农药或重金属时。