How can FOS increase the absorption of nutrients? FOS acts as a pre-biotic nutrient to bifidobacteria and lactobacillus, located in the large intestine. The good bacteria help maintain and stabilize intestinal flora. FOS has been shown to support digestive enzymes in the digestive tract leading to better absorption of nutrients. Proprietary FOS Fiber Blend (BeFlora ) is a trademark of Triarco. BeFlora Fiber Blend contains FOS, soy extract (enriched with potassium salts) and potato starch. The Best Creatine: Natural Sport uses a 99.8% pure pharmaceutical grade Creatine. Great-tasting, convenient chewable.