yellow and white beef-fat

[monique]

a little puzzle:
I did a one-time experiment with 2 kinds of raw beef fat. Both were from grassfed cows, but one cow had been in stable over winter (being fed with vegetables + hay and getting no exercise), the other had been grassfed outside.
Stable-cow gave white fat. Outdoor-cow gave yellow fat.
So betacaroteen is in outdoor-cow's fat and not in stable-cow is my assumption. Is this right?
And what about the other good things (like omega 3 etc) would I be right to assume that they exist in white fat of stable-cow? 
So is exercise also an element in the quality of fat?
If you have an idea about this I am very interested!
Thanks
Monique

[saragrambusch]

The fat, both in nutrients and appearance is going to vary from cow to cow. Even within cows completely on pasture, what they eat is going to vary by season, location etc. I would think exercise factors in just in terms of the animal's overall health and stress level. Personally, I wouldn't stress about this because I think it's always going to vary. In terms of the cows being inside or outside, Vit D is probably a big factor in the animal's ability to absorb other nutrients properly so maybe the stable cow couldn't produce as much vitamin A resulting a whiter color.

[monique]

Thanks for the analysis Saragrambusch!