Dear Siva,
What is your purpose? – good average values for hen’s eggs distinguishing between breeds, range, barn, and cage eggs, if significant difference or …?
In my opinion, differences may very much be a question of breed and especially of which feed the egg-laying hens get – this may also vary greatly between the production methods.
In DK, we have for example eggs “high in omega-3” in the supermarkets. The hens are fed with flax seeds.
Maybe a search in the poultry literature e.g. Poultry Science could give you some hints, like
The Nutrient Content of the Eggs of Five Breeds of Hen
Guillermo Arroyave, Nevin S. Scrimshaw, Oudh B. Tandon
Poultry Science, Volume 36, Issue 3, May 1957, Pages 469–473, https://doi.org/10.3382/ps.0360469
The Effect of Nutrition on the Composition of Eggs,
E. C. NABER
Poultry Science, Volume 58, Issue 3, May 1979, Pages 518–528, https://doi.org/10.3382/ps.0580518
Modifying Vitamin Composition of Eggs: A Review
Edward C. Naber
The Journal of Applied Poultry Research, Volume 2, Issue 4, Winter 1993, Pages 385–393, https://doi.org/10.1093/japr/2.4.385
there are numerous articles on the subject. This is just a few examples.
All the best,
Anders
Anders Møller
Borgediget 12
DK-4000 Roskilde, Denmark
From: Food Composition Discussion Group [mailto:[log in to unmask]] On Behalf Of Siva Sivakumaran
Sent: Friday, September 27, 2019 00:03
To: [log in to unmask]
Subject: Query on chicken eggs please
Dear All
Please any difference between free range, barn and cage eggs.
“Eggs - need more information, including expected variation in nutrients by type and sales volume. Discussion re variation in nutrient content by egg size and season”.
Please your expert advice is appreciated, do we have to analyse range, barn and cage eggs separately. Also variation in nutrient content by egg size and season.
Regards and Thanks.
Siva
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