Table 1 Concentration of growth factors

		Colostrum	Milk	Reference
EGF	Human	200 μg/L	30~50 μg/L	Playford et al. (2000)
	Bovine	trace	trace
IGF-1	Human	18 μg/L	-	Playford et al. (2000)
	Bovine	50~2,0000 μg/L	10 μg/L
IGF-2	Human	18 μg/L	-	Playford et al. (2000)
	Bovine	200~600 μg/L	10 μg/L
TGF-β1	Human	-	-	Purup et al. (2007)
	Bovine	6.3 μg/L	1.5 μg/L
TGF-β2	Human	-	-	Purup et al. (2007)
	Bovine	143 μg/L	21 μg/L