Yes, they are gluten-free and dairy-free. Improvements vary from person to person; it depends on what you are taking LiveSpo Probiotics for. Most of our customers with lifelong digestive conditions notice positive results within 2 or 3 weeks. However, if you have occasional diarrhea, bloating, gas, tummy pain, and more, you can expect to feel the effects sooner, often 2-3 days.