 The old saying is that a vitamin B shot is good for one thing, and that's to line the wallet of the person who's giving you the shot. And I firmly believe that, and we can prove it. There's about 50% of us who have one or two genes that don't allow us to convert vitamin B12 into its active form, which is methylcobalamin or methyl B12. When you're injected with a B shot and you feel better, it's actually because you're one of those people who don't make the proper type of vitamin B12. But here's the good news. You can go to Costco, you can go to any health food store and buy the active form, methyl B12, and buy the sublingual that goes under your tongue. Buy 5000 micrograms, put it under your tongue, it'll be absorbed perfectly, and I got news for you. You'll never need a B12 shot again. I do this with all my patients who are addicted to B12 shots, and once we give them the right kind of B12, methyl B12, they never take a shot again in their life. Thanks for watching. Click the circular channel icon to subscribe and make sure you don't miss a single video. Click on the left to watch another great video, and don't forget to visit my website for more of my best tips, because I'm Dr. Gundry, and I'm always looking out for you.