Best Sublingual B12. Transdermal B12 comes in the form of creams or patches. Its non-GMO and vegan friendly.
It is gluten wheat and dairy-free. Methylcobalamin has recently been shown to be a better choice. Consider some form of liquid or tabletlozenge that can be sucked on or dissolved in the mouth.
Vitamin B12 Liquid Sublingual Drops - Vegan Non-GMO Sugar Free - Best Way.
I use Trader Joes brand of sublingual B12. Solgar Methylcobalamin Vitamin B12 is a sublingual vitamin B12 product that contains a powerful dose of methylcobalamin. They also have a B12Folic AcidB-6 sublingual blend tab. It is 1000 mcg 100 tablets in the form of cyanocobalamin.