That is not true. There are problems that may or may not improve. Some may go away altogether, but as the doctor you referred to said, the earlier the treatment the more likely things will improve substantially.

Repairs can continue for years in those serious cases, but there are no guarantees.

That is likely, but it not something a person can count on, especially in early days weeks or months. It is very likely that they will improve, but each case is different. There are some similar patterns in many of the cases, but individual makeups, types and extents of damage are different. And for some strange reason, a very few people do not even see the change until many months later.

Improvement is likely if people need B12. It is possible if they need methylcobalamin specifically. But there no guarantees. And if damage is severe, the process of improvement is likely to be long and bumpy.

rose