Probiotics are living microorganisms, often called ‘friendly’ bacteria, that provide health benefits when ingested. As with other gut health supplements, the health benefits of probiotics include helping to balance the friendly bacteria in your gut, helping to prevent an upset stomach and can even help to keep your heart healthy. How much probiotic you should take depends on the specific product, as dosages will vary. However, you should keep to the advice given on the product; this will usually be one probiotic dose per day.