I think the HCL burning sensation is a myth. I have taken until 5 capsules with a meal without to feel anything. I have read from others doing the same. Anyway, HCL is really important to keep the small bowel sterile. Without HCL, bacterias, fungus, and parasites can colonize the small bowel. There is an strong link between H. Pylori, Atrophic Gastritis, and perietal cell defunction. As well, there is a link between Celiac and lack of HCL. Immune suppression also cause parietal cell defunction. ( HIV ) There is also evidence that suppression of the suppressor cells caused by a fungal overgrowth can cause an auto-immune attack against the parietal cells.