Apparent fat digestibility in rats fed different diets is negatively correlated with faecal bile acid excretion

Seventy two rats were fed one out of 9 diets differing as to protein source and calcium concentration.: For the individual rats apparent fat digestibility and faecal bile acid excretion were negatively correlated. It IS suggested that a high solubility of bile acids in the small intestinal digesta, which is associated with little loss of bile acids with faeces, stimulates the process of fat digestion.