Did same research. I actually know a doc that specializes in alternative health. (
selfhealthsystems.com), the site is neat, it gives anecdotes on each product. Also talked with hand surgeons and neurosurgeons on the subject.
Most doctors are not big believers in overdosing on vitamins. Neurologist recommended Folic Acid. Hand surgeon recommended B complex, but wasn't against taking B6 @ 100mg.
Does it work? Could it be a placebo effect? A mind is a powerful thing.
BTW, I take 100 mg of B-6 daily.