I recently started taking the OmniBiotic Stress Release formula. I have been taking prebiotic/prebiotic for years, and eat a clean, whole food diet. As someone who is experiencing optimal health, I feel that the subtle change that I am noticing the most is my digestive process is faster than before. I am also quite pleased with the customer support team. I submitted a question about the impact of this product on intermittent fasting, as it does contain a small calorie content. I received a very fast reply that throughly explained that OmniBiotic doesn't break a fast. I will definitely continue using this product.