No. 1 Doctor recommended brand (Among doctors who recommended a brand of probiotic in ProVoice 2018 survey). Probiotic helps soothe occasional bloating + vitamin B12 helps break down food digestive enzymes. Resistance Formula: When taken daily, probiotic supplements like Align Resistance Formula can help maintain digestive health. But did you know that taking antibiotics may kill off some of the good bacteria used in most probiotic brands, making the probiotic less effective? Unlike most probiotic brands, Align Resistance Formula was specially designed to survive antibiotic use (This product is not intended to treat side effects of antibiotic use), with large, strong probiotic cells that are Resistant to the effects of antibiotics (This product is not intended to treat side effects of antibiotic use). Preservative free.