White or Brown eggs---There is no nutritional difference.

qiaohe

White or Brown: Eggshell colour is determined by the type of hen that lays it. There is no nutritional difference.
White eggs are laid by white-feathered hens.
These are the most common laying hens in Canada. White eggs are usually less expensive than brown eggs.
8 R% k5 W" y2 f8 m, l' c* ]Brown-feathered hens usually lay brown eggs.
8 S9 y" n: U/ X$ n" m, hProducing brown eggs costs more because brown hens are larger than white ones and they eat more feed.

Young hens lay pee wee eggs and older hens lay jumbo eggs;
3 w( [7 G' Z- e6 t) g4 r
Free-run eggs are nutritionally the same as regular eggs.
3 h, T% {& n+ f$ K. m+ j/ N
2 n  W# v/ G* MOrganic eggs are nutritionally the same as regular eggs.

2 w* a) }* p. u% |Free-range eggs are nutritionally the same as regular eggs.

3 M. S9 _, Z. |0 w! M: j6 e$ J+ Z
' v7 R7 j0 F) e* w+ s* uHere is articles:
http://www.getcracking.ca/EDU/a_guide_to_choosing_eggs.pdf
' e$ Q& M2 _: y1 h