It can be seen that volume Nettle makes the Yellowness (b *) increase, depending on the amount of Nettle found that the color of egg yolk, up from 1.7 in those without added Nettle is 4.2 in the group with Nettle at 6.25 g / kg of the production of A. and increased to 6.5 in the group with Nettle 25 g / kg of cycle B.