THE EASIEST WAY TO GET THE B-12 YOU NEED. Vitamin B-12 can help increase energy levels and even improve memory. But often it’s tough to get enough B-12 from the foods we eat. These transdermal patches make it easy to get the B-12 you need. Simply apply a patch behind your ear or on the inside of your wrist and wear for 24 hours, once a week. It’s that easy. The nutrients are absorbed through your skin. Each patch contains 1,000 mcg of B-12. 4 patches (one month supply).