Check moisture levels at the time grains are stored and again in the spring and process to reduce mold risk. With normal feeds vitamin K should be adequate in Missouri swine rations, but it may be included where mold is present or past experience indicates a need for additional vitamin K. Water-soluble vitamins. Vitamins generally are classified according to solubility. Of the latter group, biotin, vitamin C and folic acid generally are not of practical concern in growing swine rations because adequate amounts appear to be synthesized by the animal. Thiamine and vitamin B 6 are supplied in more than adequate amounts by the feed in normal swine rations.
Recent research shows an increase in pigs per litter from adding folic acid to sow rations.
Riboflavin functions in the animal's enzyme system. It is heat-stable but is destroyed by alkali and light. It is available in good amounts in legume hays, dairy byproducts and in fair amounts in tankage and soybean oil meal. Cereal grains are a rather poor source of riboflavin. Niacin functions as a co-enzyme.