Complex sentence: Mechanisms by which B 6 can cause damage to the nervous system are unknown, but in the literature there has been speculation and proposed mechanisms based on the similarity of overdose and deficiency of this B 6.
Split into simpler sentences: Mechanisms by which B 6 can cause damage to the nervous system are unknown. In the literature there has been speculation and proposed mechanisms based on the similar symptoms of overdose and deficiency of B 6.