Grass fed beef does have many of the benefits of organic beef, simply as side effects to raising their cattle on a pasture. Because the cows are in their natural habitat, with access to all of the open space you need to support a herd of cattle, their lives are more humane, less stressful, and much more sanitary, which means their immune systems are under less pressure, don’t require artificial assistance, and their meat is much less likely to be contaminated with diseases like E. Coli. If antibiotics are used on grass-fed cattle, it’s only in rare cases when the animals are actually sick, not constantly like feed-lots have to use them. Why pay for gallons of antibiotics if your animals are healthy and clean all on their own? Cows eat all kinds of plants on the pasture, including weeds, so it doesn’t make sense to spray their pastures full of herbicides. Pastures are essentially wild, with their own balanced ecosystem and plenty of help from cow manure, so pesticides and artificial fertilizers are really unnecessary. While grass-fed, non-organic beef may be exposed to more chemicals than organic, it’s certainly cleaner than conventional beef.
