THE PROBIOTIC BRAND DOCTORS RECOMMEND MOST.‡ Recommended by Gastroenterologists two times more than any other probiotic brand, Align is the #1 doctor and gastroenterologist recommended probiotic brand‡. When taken daily, Align Probiotic Gut Health + Immune Support capsules help support a healthy digestive system and help strengthen your immune system. Align Probiotic Gut Health + Immune Support capsules are vegetarian, gluten-free, and do not require refrigeration.‡Among Doctors and Gastroenterologists who recommended a brand of probiotic in ProVoice 2023 survey.