Too little Vitamin B6
Vitamin B6 (Pyridoxine) is under normal healthy conditions produced in sufficient quantities by the large intestine of the horse. When stressed or when workloads are high B vitamin production can be reduced and supplementation is recommended. The ratio of grains to forage also influences B vitamin production with high grain and low forage diets negatively impacting on production. Always feed adequate forage.
Solutions: Concentrates and most vitamin/mineral mixtures for horses are supplemented with vitamin B6. Bakers yeast and brewers grain are good sources of B6.
Too much Vitamin B6
Moderate over feeding of vitamin B6 has no known negative effects.
Solutions: Consider reducing the intake of high B6 feeds and supplements.