Table 1.

Phenotype frequency obtained from lactose tolerance testing among different ethnic groups in Iran

Group	Occupation	Language	Sample Size	LP	LNP	LIP
Kurd	Herder	Indo-European	138 (34.5%)	8 (5.79%)	92 (66.66%)	38 (27.53%)
Mazani	Farmer	Indo-European	110 (27.5%)	9 (8.18%)	77 (70%)	24 (21.81%)
Persian	Herder	Indo-European	78 (19.5%)	12 (15.38%)	52 (66.66%)	14 (17.94%)
Arab	Herder	Afro-Asiatic	26 (6.5%)	7 (26.92%)	13 (50.00%)	6 (23.07%)
Lur	Herder	Indo-European	24 (6.0%)	0 (0.00%)	15 (62.50%)	9 (37.50%)
Gilak	Farmer	Indo-European	9 (2.2%)	1 (11.11%)	6 (66.66%)	2 (22.22%)
Azeri	Farmer	Turkic	15 (3.8%)	1 (6.66%)	11 (73.33%)	3 (20.00%)
Total	–	–	400	38 (9.5%)	266 (66.5%)	96 (24.0%)