one of the best B vitamins.
Look it up, do your research, and you’ll see why.

e.g., let’s take B6 (the natural one is called "pyridoxal," the synthetic one "pyridoxine"): *pyridoxine HCL* (HydroChLoride), which a well-known brand has, is different from *pyridoxal phosphate*, which this one has.
Pyridoxine hydrochloride (B6 hcl) causes symptoms of B6 DEFICIENCY. That is, try the well-known brown-colored brand (which also has magnesium in it) for a couple of months and feel the tingling in your toes (one of the symptoms of B6 deficiency).
Meanwhile, this well-known brand with B6 (hcl as we said) and magnesium together (it sells because B6 helps magnesium be absorbed, but which magnesium!) contains Magnesium OXIDE. It is the magnesium with the worst absorbability, about 6%!
(There are many forms of magnesium; prefer [bis/]glycinate, 80% absorbability)

Then, let’s look at B12, or otherwise cobalamin. Here it has the (more expensive because it is the biologically active version, unlike the other one I’ll mention) methylcobalamin. and NOT cyanocobalamin, which is the cheap/synthetic version and is found in most B12 supplements. Look them up!
With these, you make your liver go through the process of filtering the (tiny amount, of course) cyanide. Which in large amounts is not good.

Also, another IMPORTANT one: B9! or otherwise FOLATE. You know it as "folic/folinic acid". Even here it is labeled as folic acid so people can see it and say, ah nice, it has that too. But in parentheses you will see that here it has MethylFOLATE (*folate*, and not folic acid). That is, it has folate, the natural/"activated" B9 and not the cheap/synthetic one.

After so many years I finally found a proper B supplement. Only this one now. Only this one.

Do your research... See the differences...