Dr. Formulated Probiotics Once Daily Men’s is a unique “just one capsule a day” shelf stable probiotic for men. Once Daily Men’s is a specifically designed vegetarian supplement with a high probiotic count to support a healthy microbiome and men’s specific health needs. Dr. Perlmutter created this unique formula with a high count of beneficial probiotics made from diverse strains, including Lactobacilli and Bifidobacteria, that are resistant to stomach acid and bile, exclusively for men’s colon support, occasional gas and constipation relief and immune system health. David Perlmutter, M.D., is an expert in the human microbiome, a board-certified neurologist, Fellow of the American College of Nutrition, America’s brain-health expert and 1st New York Times best-selling author.