Dr. Richard Robertshaw, DC recommends the following website to see if any vitamins, herbs and pharmaceuticals have possible negative interactions with each other, or any foods. www.drugdigest.org
For more on how movement is affected by diet, lifestyle, environment and prescription pharmaceuticals see chapter “Every system counts” in the book “Movement Perspectives™” p. 79 -89. There are other books from Applied Kinesiology (including “Artful Muscle Testing,” 1976), and Chinese Medicine (including “Eat, Sleep, be Happy” by Dr. Chady Wonson, DC, LAc, CTN, CNC) that also address these issues.