I plan to do the recommendations of Dr. David Gregg dissolving Vitamin B12 in DMSO:
"The absorption of vitamin B12 requires a highly specialized process which tends to become less effective with age...I realized that if I dissolved vitamin B12 in DMSO, it might carry it directly to my blood stream through my skin. I tried it and the results were dramatic for me, far greater than any impact I had ever felt from oral or sublingual tablets. I put some of my vitamin B12 tablets obtained at a health food store into a two liquid ounce bottle with an eyedropper and filled it with DMSO. It took a couple of days for the tablets to fall apart. Once they did, I put an eyedropper load on one arm and rubbed it in. In approximately one hour I started to feel very good, which was a sense of general strength and well-being."