If you are older, and are taking blood thinners, if you have a disease or condition that keeps your blood from clotting properly, or if you are soon having surgery, you may find yourself with some unexpected dietary restrictions. Onions and garlic, especially raw onions and garlic, are off the plate.
Onions have never been a risk when I looked. Garlic was not recommended, but my experience to date says that’s rubbish. I consume a fair bit of garlic, and my dose has not changed in years. It might be different for others, but generally unlikely.