What is the best probiotic to take after being diagnosed with a doxycycline related disease (gastritis, gerds)?

Pro mean with. And bio means life. Probiotics help the GI system digest food. Anti means against. So, if one takes excessive antibiotics (which are sometimes needed) they can kill off the good bacteria in our GI systems and we can have digestive problems. Look for a wide variety of strains of probiotics you choose. This is more important that the number or potency of the product. Peace and good health.