Liquid humate extracts, primarily humic acid, have been assessed in several USA beef cattle trials. Through these well-conducted trials, varying levels of humic acid were fed, observing enhanced weight gain and decrease in feed dry matter conversion (i.e. lbs dry feed/weight lbs gain).

United Kingdom trial with dairy cattle fed humic acid observed significant improvement in milk production.

United Kingdom trial with piglets fed humic acid at 3 different levels observed significant improvement in growth and decrease in scours through the feeding period. Pigs are monogastrics and not dependent on rumen microbial activity. The interesting item is the humic acid molecule may have acted to promote beneficial intestinal microbes.