The large intestine ‘colon’ has the most microbial colonisation in the digestive tract, 100 Billion cfu/ml. Probiotics taken orally need to survive the acidic environment of our stomach. The pH of the stomach is 1.0 -3.0. The pH of the colon is 5.5-7.5 (1,2,3). Probiotics taken rectally bypass the acidic environment in the stomach, and the travelling distance of 7.5m approximately to the colon. Probiotics taken rectally ensures the destination is reached and the bacteria are still alive and stable.
- S Biradar, S Bahagvati, B Sheunshi. Probiotics And Antibiotics: A Brief Overview. The Internet Journal of Nutrition and Wellness. 2004 Volume 2 Number 1
- M Blaut, T Clavel, 2007; Nugent SG et al, 2001
- J Gerritsen, H Smidt, G Rijkers, W de Vos. Intestinal microbiota in human health and disease: the impact of probiotics. Genes Nutr. 2011 Aug; 6(3): 209-240. Published online 2011 May 27. doi: 10.1007/s12263-011-0229-7