Are there any vitamins that can help people with MG?

Answer 1

No research has proven Vitamin helps people with MG. However, there's a medicine called Soliris, approved by FDA in Oct 2017, it's a treatment for adults with generalized Myasthenia Gravis (gMG) who are anti-acetylcholine receptor antibody-positive.

Soliris is the first in a new class of drugs to be approved for MG in the U.S.

If you haven't heard or tried Soliris, I'll recommend you discuss with your Dr. about taking this new medicine.

Answer 2

Multi-vitamin does no harm so people with MG can take them. At least it's helpful to prevent malnutrition. 

Treatment is a different story.

Up to now the researches focus on gene therapy and surgery. Other than the 2017 approved medicine, the other one that might come promising is surgery.

Surgery to remove the thymus gland in patients with myasthenia gravis (MG), a rare autoimmune disease affecting neuromuscular function, provides significant clinical benefits for as long as five years after the procedure, according to a paper published on Jan. 25 in The Lancet Neurology.