CNI 3-Phos-B has an enteric coating for optimal absorption. Phosphorylated active forms of B-1, B-2 and B-6. Thiamin Pyrophosphate B-1 supports cardiovascular and immune systems. Riboflavin-5'-Phosphate B-2 for energy production. Pyridxal-5'-Phospate B-6 for proper amino acid absorption and metabolism. Highest quality nutrients.