We use premium, 100% natural, grass-fed beef for our hamburgers.
Besides the true, rich taste of natural beef, meat from a grass-fed steer has about one-half to one-third as much fat as a comparable cut from a grain-fed animal.
Lower in calories, grass-fed beef is also higher in vitamin E and omega-3 fatty acids, which helps to reduce the risk of cancer, lower the likelihood of high blood pressure, and make people less susceptible to depression.
Further, meat from grass-fed cattle is rich in another beneficial fat called conjugated linoleic acid (CLA), which is also believed to lower the risk of cancer.
here are a few articles on the differences
from the university of california web site
from the food revolution by john robbins
BUNS is a mobile, gourmet burger joint preparing all natural, locally grown foods, fresh buns, and grass-fed beef.