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.
' j2 R& P  ?6 s  o! \; ]& XWhite eggs are laid by white-feathered hens.
, W8 J* ]' [8 oThese are the most common laying hens in Canada. White eggs are usually less expensive than brown eggs.
Brown-feathered hens usually lay brown eggs.
/ G5 k* e* h' o, c" k6 b7 mProducing brown eggs costs more because brown hens are larger than white ones and they eat more feed.
. ~3 }  W" m7 k0 {7 z
Young hens lay pee wee eggs and older hens lay jumbo eggs;

Free-run eggs are nutritionally the same as regular eggs.
. @% a' v7 i5 D0 Q, [" Q
Organic eggs are nutritionally the same as regular eggs.
% Z: I  ^. `  \$ p% P5 v5 A
1 S0 o% V( O$ n2 S7 YFree-range eggs are nutritionally the same as regular eggs.
9 H  S& ?  _' w) J6 y

; j- `& m* L9 D. {: K% ?Here is articles:
http://www.getcracking.ca/EDU/a_guide_to_choosing_eggs.pdf