First off supplements unlike prescription meds rarely if ever are covered in the U.S. under health insurance plans. There sometimes very expensive. Especially the most natural, GMO free, Gluten free, and dairy free ones with no artificial colors, dies, flavors, or any other bad stuff including extra unneeded intolerant ingredients. Making them out of reach cost wise for many of us. Especially adults without parental or partner payment assistance for them.
They also take a little extra work to find the right one if a nutritionist or other holistically trained individual doesn’t advise you specifically on the right brand, or form of the supplement that will work for you. Tip- the Holistic Practitioners and or Amazon may only have the higher quality version of each supplement that could be ideal for you or your loved one. ( Same is true for other stuff too like Protein Powder)
However, the effectiveness of them on the SPD, ASD, sensitive community is discussed on Julie Matthew’s blog where she shares new research studies on the effects of Supplements and Vitamins on children and adults with ASD. Her blog entry is interesting and I recommend you check it out here Julie Matthew’s on Supplement need with ASD