​Tri-B® is a small tablet that provides the three B vitamins: folic acid and vitamins B-6 and B-12. Research indicates that these vitamins help maintain normal blood levels of homocysteine, which plays an important role in maintaining healthy arteries to promote heart health. Homocysteine is an amino acid produced by the body that's an important building block of protein. Support healthy blood and a healthy heart with Carlson Tri-B®.