In the Appendix of Lean And Healthy To 100 it indicates to visit www.adviceformychildren.com and look for "Products" to view a list of products that Gordon and his family have used as of the book's release in early 2012. Those websites now forward to this page on Gordon's business website and below is that list.
Follow the simple eating guidelines and simple lifestyle daily steps in the book and choose whichever below product(s) you believe is appropriate for you based on what you learned in his book.
Colon cleanse product: Google "Aim International Herbal Fiberblend". Can be purchased from whichever vendor you choose.
Barley powder: Google "Aim International Barley Life". Can be purchased from whichever vendor you choose.
Liquid supplement: Google "Youngevity Ultimate Classic". Can be purchased from whichever vendor you choose or you can substitute the amazing product called Life's Qik Fix here.
Plant trace minerals: For the product called Sentramin click here.
Essential fatty acids: Eat grass fed butter.