Nerve Supplement Tablets, Vitamins and Medicine: How They Differ

Only in shape. Nerve supplement tablets and capsules are both ways to deliver the same kind of product, and the form says nothing about what it does.

The legal category matters more. A dietary supplement is sold as a food-type product. The FDA does not approve it before sale (FDA, Questions and Answers on Dietary Supplements). It may describe an effect on the structure or function of the body, with a notice, but it may not claim to treat a disease (FDA, Structure/Function Claims). A medicine goes through a different route and is made for a stated use.

So a nerve supplement tablet and a nerve medicine can sit on the same shelf and be unrelated in what they are allowed to promise.

Vitamin replacement is aimed at a shortage. MedlinePlus says it is considered when levels are low (MedlinePlus, Peripheral neuropathy).

One example: NIH says vitamin B12 deficiency can cause numbness and tingling in the hands and feet, and that some medicines lower absorption (NIH ODS, Vitamin B12 (health professional fact sheet)). A blood test finds that. A supplement bought on a guess does not. Flow Nerves does not list B12.

Flow Nerves lists no vitamin among its six named ingredients. Magnesium is a mineral. Alpha-lipoic acid, carnitine and coenzyme Q10 are compounds the body also makes.