The issue with these studies, according to what I've heard, is that they use the wrong type of aspirin - they use enteric-coated aspirin, which doesn't work the same way. Instead, if you take pure aspirin (you can only find it for veterinarian use) together with vitamin C and/or DGL (Deglycyrrhizinated Licorice), then you protect your stomach from aspirin, and it acts as it's supposed to act. Georgi Dinkov of Ray Peat's fame told me once that another trick is to take aspirin with gelatin, which also coats and protects your stomach lining. I discussed different novel aspirin formulation such as the disappeared now Vazalore. I still think the easiest way is to take Aspirin C by Bayer in Europe and breat it into 4 pieces, because the asprin dose is pretty high otherwise, which is good if you have an acute problem, but it's a bit too much for a daily use.