Just came across this vitamin b complex transdermal cream on amazon and might give it a try. I wonder if B vitamins applied directly to the area of nerve injury might be more effective than taken orally?

It is a transdermal formula that contains B5, B6, B9, B12 and Alpha Lipoic Acid. Sarati's Vitamin B Complex Transdermal Body Cream delivers B vitamins through the skin, bypassing the liver and stomach. Each 2 ounce tube contains approximately 46 quarter teaspoons and these vitamins: 141.2 mg of Folinic Acid (Vitamin B9), 141.2 mg of Alpha Lipoic Acid, 28.2 mg of Methylcobalamin (Vitamin B12), 282.4 mg of Pyridoxal-5-Phosphate (Vitamin B6), 282.4 mg of Calcium Pantothenate (Vitamin B5).