Study: Industrial Hemp Supplementation Reduces Stress and Improves Antioxidant Levels in Angus Cattle

Researchers at Alabama A&M University conducted a 35-day trial with 20 black Angus heifers divided into two groups: one received standard commercial feed, while the other was supplemented with industrial hemp at 150 grams per kilogram of feed for 21 days, followed by a 14-day monitoring period. The results showed several key differences between the two groups. Cattle given industrial hemp consumed less water, averaging 51.39 liters per day compared to 55.09 liters in the control group. Rumination time and rumen pH remained stable, suggesting hemp maintained normal digestive function. Importantly, antioxidant levels improved in the hemp-fed cattle. Total antioxidant activity rose significantly during supplementation, and glutathione peroxidase (GPx) levels were higher than in the control group. Markers of oxidative stress, including malondialdehyde (MDA), were reduced.

Stress biomarkers also shifted. Cortisol, a hormone linked to stress, was significantly lower in the hemp group, averaging 97.54 ng/mL compared to 122.23 ng/mL in the control cattle. While no major differences were noted for heat shock proteins, the overall profile suggested a reduction in physiological stress.

Researchers concluded that industrial hemp supplementation can improve antioxidant capacity and reduce stress in cattle, while supporting rumen health. They suggest that hemp may represent a valuable feed additive for enhancing both the well-being and productivity of livestock.