Nutrafol Hairbiotic MD - 3 Month SupplyAdded Support for Nutrition Targets the gut microbiome as a root cause of compromised hair nutrition with 11 strains of pre and probiotics known to help improve hair quality. Our unconventional prebiotic is a blend of 4 phage prebiotics to improve the microbiome as it relates to hair. 7 unique probiotic strains promote microbiome biodiversity, improve the gut lining, and increase your bodys ability to absorb hair building nutrients.