The Na-R-ALA that I take is included in the protocol of neuropathy supplements that I take (4 capsules in the morning, 2 at noon, 4 in the evening). I attached a Why the Protocol PDF document with links including the research for each of the supplements and there is a link to the site where the protocol group orders the monthly supply.

I haven't taken this Immunovites brand but it's similar to what I take. It says 600 mg per serving and a serving size is 2 capsules - https://www.amazon.com/Stabilized-R-Alpha-Increased-Absorption-R-Lipoate/dp/B07DP8DHBH/