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.
3 L# z( x3 U' x* ^: z( `6 fWhite eggs are laid by white-feathered hens.
) g. q/ M1 J! @8 wThese are the most common laying hens in Canada. White eggs are usually less expensive than brown eggs.
; h- `6 w7 `, v, L! [Brown-feathered hens usually lay brown eggs.
Producing brown eggs costs more because brown hens are larger than white ones and they eat more feed.
  t' X9 ^( E. L5 b
# L6 M9 v  E" \0 m" M* p: RYoung hens lay pee wee eggs and older hens lay jumbo eggs;
" B3 X" {5 l" X/ F! F1 e3 {* \' M3 s
Free-run eggs are nutritionally the same as regular eggs.

+ v. U% w% C# X1 w/ k0 E! TOrganic eggs are nutritionally the same as regular eggs.

- d' M  c, H7 @( x1 R6 ?( gFree-range eggs are nutritionally the same as regular eggs.
) b2 m  ~5 h& |8 Z$ y
4 c/ }) W6 n9 i) j% z
. o6 C( V' E3 nHere is articles:
# p+ q: @2 h7 B  |$ shttp://www.getcracking.ca/EDU/a_guide_to_choosing_eggs.pdf
7 T; V% d# h  Y$ q$ G9 P; B9 C