September 11, 2025

Effects of isoflavone supplementation, via red clover hay, on the growth and postgraze physiological recovery of beef steers grazing endophyte-infected tall fescue pastures.

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Experiment shows isoflavone supplementation enhances average daily gain in beef steers grazing tall fescue, implying better recovery outcomes.

Average daily gain increased with 7.5%-RC daily or QOD, reaching 0.77 kg d-1 and 0.83 kg d-1 respectively, compared to 0.55 kg d-1 for control steers.
Steers supplemented with red clover showed 2.5× larger caudal artery luminal areas and increased serum prolactin concentrations after grazing versus controls.
Doppler ultrasonography monitored artery luminal areas, verifying vascular health during recovery from grazing on E+ tall fescue.
Isoflavone supplementation is an effective strategy to enhance cattle growth and expedite physiological recovery post-grazing.

Davis et al. (2025) studied this question.

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Experiment shows isoflavone supplementation enhances average daily gain in beef steers grazing tall fescue, implying better recovery outcomes.