This is a superb product. You must be a bit of a nerd to understand this.
This B 12 product has 3 different forms of B12 and these 3 forms have different benefits.
Moreover these a supported by active forms B 6 & 9.
If you want to have the Nonplusultra B12?
Choose this one.
B12 increases the function of the nervous system and reduces fatigue 😎