David is an interesting person. He helped my child some, but he was quite expensive. He is caring, but he doesn’t know everything. My child was best helped by her medical doctor. She figured it out, that my daughter uncommonly gets stomach migraines. I also heard from a friend that recommended him that she was sick after 1 treatment when she was given some of his standard process stuff that made her sick. When notified, he said that it could not of been itit was the flu. She took it again, and the same violent reaction occurred. This did not always happen with taking other standard process vitamins.