Our son is 47 years old with disabilities due to a late diagnosis. He has never used anything but MSUD Complex. He has severe anxiety and even though we have formula, we will run out in May and he is already worried about not having any. All need to understand that our sons and daughters cannot just switch to whatever is available. We need this crisis to end. His physician helped develop this type of formula and he cannot even get the labs to give him an answer about the shortage. We as parents are very concerned about this lack of basic nutrition.