$20 off your Bottle with a Blend Subscription. Use code Flow20.


Pre + Probiotic Ultra Ingredient References

Our formulations are created with carefully sourced, research-backed ingredients.

Bouhnik, Y., Raskine, L., Simoneau, G., Paineau, D., & Bornet, F. (2006). The capacity of short-chain fructo-oligosaccharides to stimulate faecal bifidobacteria: a dose-response relationship study in healthy humans. Nutrition Journal, 5(1), 8.

Chapman, C. M. C., Gibson, G. R., & Rowland, I. (2011). Health benefits of probiotics: are mixtures more effective than single strains? European Journal of Nutrition, 50(1), 1–17.

Febvre, H. P., Rao, S., Gindin, M., Goodwin, N. D. M., Finer, E., Vivanco, J. S., Lu, S., Manter, D. K., Wallace, T. C., & Weir, T. L. (2019). PHAGE Study: Effects of Supplemental Bacteriophage Intake on Inflammation and Gut Microbiota in Healthy Adults. Nutrients, 11(3), E666.

Gibson, G. R., Hutkins, R., Sanders, M. E., Prescott, S. L., Reimer, R. A., Salminen, S. J., Scott, K., Stanton, C., Swanson, K. S., Cani, P. D., Verbeke, K., & Reid, G. (2017). Expert consensus document: The International Scientific Association for Probiotics and Prebiotics (ISAPP) consensus statement on the definition and scope of prebiotics. Nature Reviews Gastroenterology & Hepatology, 14(8), 491–502.

Grubb, D. S., Wrigley, S. D., Freedman, K. E., Wei, Y., Vazquez, A. R., Trotter, R. E., Wallace, T. C., Johnson, S. A., & Weir, T. L. (2020). PHAGE-2 Study: Supplemental Bacteriophages Extend Bifidobacterium animalis subsp. lactis BL04 Benefits on Gut Health and Microbiota in Healthy Adults. Nutrients, 12(8), 2474.

Holscher, H. D., Doligale, J. L., Bauer, L. L., Gourineni, V., Pelkman, C. L., Fahey, G. C., & Swanson, K. S. (2014). Gastrointestinal tolerance and utilization of agave inulin by healthy adults. Food & Function, 5(6), 1142–1149.

King, S., Glanville, J., Sanders, M. E., Fitzgerald, A., & Varley, D. (2014). Effectiveness of probiotics on the duration of illness in healthy children and adults who develop common acute respiratory infectious conditions: a systematic review and meta-analysis. British Journal of Nutrition, 112(1), 41–54.

Markowiak, P., & Śliżewska, K. (2017). Effects of Probiotics, Prebiotics, and Synbiotics on Human Health. Nutrients, 9(9), 1021.

Rawi, M. H., Abdullah, A., Ismail, A., & Sarbini, S. R. (2021). Manipulation of Gut Microbiota Using Acacia Gum Polysaccharide. ACS Omega, 6(28), 17782–17797.

National Institutes of Health Office of Dietary Supplements. Probiotics fact sheet for health professionals. Updated June 3, 2020.