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December 10, 2024

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My masters thesis 'From Pasture to Plate' has been published, comparing 300 ribeye steaks across grass-fed and grain-fed beef. 10 tables, 30 figures, 150 pages.

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From Pasture to Plate: Striking an Omega Balance Between Grass-Fed and Grain-Fed Beef Ribeyes - Fatty Acid Composition, Minerals, Soil, And Forage Analysis

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My thesis has been published!


Most beef cattle in the US are feedlot-finished where intensive feeding of grains is used to increase weight and yield; however, a minority are raised in grass-fed operations that use exclusive pasture, rangeland, and hay for feeding, possibly leading to benefits for the land, soil, ecosystems, forages, and the meat itself. These operations use a variety of methods, and the goal of this was to recognize differences in the soil and forage metrics to help understand the resulting meat fatty acid composition and mineral content. We collected these samples from 78 sets of farmers while testing 25 sets of grain-fed controls, usually purchased from a store. We found major differences in organic matter between beef pasture soil and corn field soil and in the fatty acid content of forage and grains. These differences were highlighted with better fatty acid composition and mineral content in grass-fed meat. These results show the variability in beef operations across a range of variables, providing valuable insights into how different feeding practices impact the quality of beef and the environment.

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Big Vegetable Oil
The Vegetable Oil industry is huge and has been growing since the late 19th century. They likely dictate dietary advice to eat highly linoleic diets, while genetically modifying seeds to contain less LA due to health dangers.
Seed Oils
Grain-Fed Beef
Grain-fed beef refers to cattle that are raised on a diet primarily composed of grains, such as corn or soybeans, instead of their natural diet of grass. This type of feeding regimen is commonly practiced in industrialized or intensive farming operations. The purpose of grain feeding is to promote rapid weight gain in cattle, resulting in larger and more marbled cuts of meat. The grains provide a concentrated source of energy, enabling the animals to put on weight quickly. This method of feeding can significantly shorten the time it takes for cattle to reach market weight compared to grass-fed cattle. Grain-fed beef is known for its tenderness and a richer flavor due to the higher fat content. The increased marbling, or intramuscular fat, contributes to the juiciness and flavor profile of the meat. The fat content also affects the cooking process, making it easier to achieve desired levels of doneness. However, it's important to note that grain feeding also has some criticisms. Some argue that grain-fed beef may have a less favorable fatty acid profile compared to grass-fed beef. Grass-fed beef tends to have a higher proportion of beneficial omega-3 fatty acids and a more balanced omega-3 to omega-6 ratio. Additionally, there are concerns about the environmental impact of intensive grain feeding, including land use, water consumption, and greenhouse gas emissions associated with grain production.
Grass-Fed Beef
Grass-fed beef refers to meat derived from cattle that have been raised primarily on a diet of grass or forage throughout their lives. The term "grass-fed" typically implies that the cattle have been allowed to graze on pasture for most of their lives, as opposed to being fed a diet primarily composed of grains or other supplements.
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