Well then, get started.
Just kidding Scorp.
If I understand correctly, that's about 18,000 supplements that have some info on safety and effectiveness. Many more than I would've imagined.
As for Ashton, I do believe he recommends Vitamin D3 and I am not planning on giving it up. Here's some recent research from the Annals of Neurology.
Vitamin D status is associated with relapse rate in pediatric-onset multiple sclerosis
After adjustment for age, gender, race, ethnicity, disease duration, disease-modifying therapy, and length of follow-up,
every 10 ng/ml increase in the adjusted 25-hydroxyvitamin D(3) level was associated with a 34% decrease in the rate of subsequent relapses (incidence rate ratio, 0.66; 95% confidence interval, 0.46-0.95; p = 0.024).