I had issues keeping my B12 levels up. I was supplementing regularly, but every time I got bloodwork done, my B12 levels were still low. It turns out I wasn’t absorbing B12 properly through oral supplements. I'm so glad I found B12rx — I'm finally able to maintain healthy levels. What I like most is that the shot is virtually pain-free, and I only need to do it once a week. It's made a major improvement in my overall well-being.