MS is an autoimmune disease and so I use immune amphoterics, immuno-regulatory herbs, nootropics, systemic anti-inflammatories, and of course each protocol is geared to the specific patient and their unique constitution, energetics, and symptoms rather than the disease. Yes, I have had some MS patients who have had very long-term remissions (20 + years). Supplements certainly play a role in the treatment ( I give Vitamin D, Fish Oils, methylated B complex) although I use dietary modification (anti-inflammatory diet and avoiding food sensitivities), herbs and lifestyle changes as primary therapies. As for dosing Vitamin A , 10,00 is the RDA, that is not the same thing as a safe level. In this case if you have no way to measure serum levels (blood tests) you probably should avoid much higher doses especially for longer periods of time.