Flora Senior's Probiotic - Formerly Udo's Choice Super Advanced Adult Probiotic - Made with 7 senior-specific strains providing 20 billion viable cells. Provides live micro-organisms that form part of a natural healthy intestinal flora. When the ratio of good bacteria to bad is out of balance, problems begin to arise such as poor absorption of nutrients and intestinal toxicity. This can result in gas, bloating, diarrhea and constipation, among other discomforts. If this imbalance is left untreated, the symptoms can become chronic and can compromise the immune system and lead to other serious health concerns.