Impacts of common factors of life style on serum liver enzymes

Table 2 Lower and upper normal limits for alanine aminotransferase and gamma-glutamyltransferase based on non-drinkers with normal weight

	Normal weight non-drinkers			Reference1
	n	Lower limit U/L	Upper limit U/L	Lower limit U/L	Upper limit U/L
ALT
Men	162	10	47	10	70
Women	523	8	37	10	45
GGT
Men	162	11	52
< 40 yr	55	10	48	10	80
≥ 40 yr	107	12	53	15	115
Women	522	8	42
< 40 yr	228	8	34	10	45
≥ 40 yr	294	9	47	10	75

¹Commonly used values in Nordic countries based on NORIP data[26].