This kind of highlights the difference between correlation and causation.
The root cause of ADHD is not currently fully understood but it's unlikely that it's a vitamin B deficiency.
People with ADHD also routinely have an iron deficiency in their brains during childhood -- which scientists theorize could be a contributing factor -- as well as a genetic anomaly, which appears to be hereditary. It's still not known if either of those things actually causes ADHD. Unfortunately, by the time symptoms are present, the damage is already done.
Taking vitamin B supplements won't necessarily hurt any but I don't know that it would help much either, outside of giving you an energy boost.
Yep, it's a total shitshow with most research and popular science news. More results are coming together about various ND conditions being strictly genetic, yet there's still a ton of people out there talking about what could trigger issues after birth, and cures. You can no more make a zebra into a horse than you can make an ND person into an NT person.
Some of the things people consider issues are unproblematic and natural within ND populations, but NT people rule the world and since they deem it weird, we have to change. I'm at least hopeful that this ND awareness spring we seem to be in, where a lot of adults are becoming aware that they are (and always have been) healthy ND adults, will give rise to some improved acceptance and eventually help shift how we treat ND children to avoid the everyday traumas that I think lead to unhealthy ND adults. I'd be even more optimistic if I'd weren't for the constant denialism and pushback from everyone, including professionals, and even people gatekeeping in the ND population.