“…As shown in Table 3, they require carbohydrate and bicarbonate (or CO2 gas) as carbon sources, but organic acids, fatty acids and amino acids are not effective as carbon sources. Among the amino acids only cysteine or cystine is reported to be essential as nitrogen source by Hassinen (9), while it was reported that several other amino acids were required for growth (32,34). Concerning requirement of vitamins, Hassinen (9) reported that pantothenic acid and biotin were essential for bifidobacteria of baby origin.…”