12/02/2024
No, yellow fat is not a depiction of age. A quick google search could easily educate the skeptics. Some people are so stuck in their ways, including some butchers, that there is no other way to feed cattle but their way. Yellow fat is an indication of beta-carotene. This compound is the same pigment that makes some vegetables yellow, orange or red.
The confusion is that older cattle do usually have yellow fat, is a result of older cattle are not being fed a grain ration. You could take older cattle and put them on a high ration of corn, and their fat will bleach to the wight buttery fat our society is used to seeing. Corn is metabolized into sugar. Sugar acts as a bleach and will remove the yellow redness from the meat. Google it.
It wasn't until the industrial revolution and two world wars that cattle were fed a high corn diet. It wasn't until they needed to feed a world in turmoil and a military, did they need to produce meat at a faster rate because the age group of finished cattle was depleted. Thereafter, this practice was standardized not for quality purposes, but efficiency reasons, and marketed as superior. An example of this is the marketing of the breed Angus as the superior quality beef producer. Yet for the USDA to stamp it as Angus, the animal must show a few characteristics and be over 51% black. That being said, 32% of the prime beef sold in the US is from the breed called Holstein. Far from the Angus breed, but are typically over 51% black. In shorter terms, it's all a marketing game.
To say yellow fat is a sign of age is like saying the geese migration is the cause of the session's to change. It simply is not.
This photo is not mine, but from a Facebook post. This is an example of a finished grass-fed carcass.