Have vitamin b12 deficiency, and was told to start taking daily high dose oral supplements (injections not practical). so many options! what's best?

Try sublingual tabs: Try the sublingual tablets, then get your levels tested in 3-6 months. Place the tablet beneath your tongue/allow it to dissolve.Can be taken with /without food.Heavy alcohol intake can decrease the effectiveness of this medication. Talk with you doctor if you are drink alcohol on a regular basis. B12 also available in tablet / nasal forms. B12 found in meat, fish, liver cheeses/milk. Take car.