Genestra, HMF replete Daily Probiotic Supplement, 7 0.7 oz Sachets of Powder Pygeum Colostrum is a nutrient dense combination Colostrum is a nutrient dense combination of immune system components and growth factors for supporting optimal natural defense 4:1 herbal extracts formulated according to a traditional Native American Ojibwa formula However‚ when possible and if convenient‚ we recommend you store your probiotics in the freezer or refrigerator‚ especially if you plan to preserve the freshness of your product for months or years Most other available probiotics are composed of animal strains‚ which may be less supportive of the human GI tract