Patrick, I'm taking Inosine close to 3 months. Sphingolin I took for 2 months. And these helped my nerve burn/tingle issue. Truly. I read a review on Sphingolin at iherb by a person with MS and I think she said she's taking it 3 weeks or so and no help yet that she can tell. I may get another bottle of Sphingolin just for good measure. These 2 are surely affordable.

We all want "things" to work so get anxious when it doesn't help right away. That's not how things work. And so many different issues and bodies.