You might try coconut oil. Some do better with a Ketogenic diet. Vitamin D is very important for fighting all disease. Has he had his vitamin D level checked. You have to try different things until you find something that works. Keep in mind the body can repair itself if you give it what it needs. There are different things you can try which may help.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2367001/
http://www.naturalnews.com/042624_coconut_oil_Parkinsons_patient_quality_of_life.html
http://www.pdf.org/en/statements_vitamind
Post Edited (eat2bwell) : 1/12/2017 1:13:30 PM (GMT-7)