Table 1.

Composition (%) of milk from yaks raised at different altitudes.

Component	Altitude			Cow's milk
	3,215 m	4,340 m	5,410 m
Total solids	16.0 ± 1.6b	17.4 ± 1.6c	18.8 ± 1.6d	13.1 ± 0.7a
Fat	5.3 ± 0.4b	6.7 ± 0.7c	7.0 ± 0.9c	4.1 ± 0.6a
Protein	5.0 ± 0.7b	5.2 ± 0.3b	5.8 ± 0.5b	3.4 ± 0.4a
Lactose	4.9 ± 0.5b	5.3 ± 0.3b	5.7 ± 0.4b	5.1 ± 0.3a

Values are mean ± standard deviation; means with different superscript letters within the same row are significantly different (P < 0.05).