@gus0557 I have not tried Nervital, but i take 5 of the ingredients daily and add D3, magnesium glycinate (low dose), CoQ10 and CBD/CBG (day time). All have recognized benefits. Unfortunately, many companies focus on a few and formulate to higher concentration. Of course, share your concern with your doctor. Mine are very supportive of my attempt to weather PN using non-opioid supplements and Lyrica and a topical balm.