Infrequent or excessive number of regular bowel movements
Illicit drug use
Vegetarians
No fish oil supplements (including cod liver oil) for one month prior to study admission
No dietary supplements, including those containing any vitamins, minerals, herbs, plant concentrates (including garlic, gingko, St. John's wort) or homeopathic remedies, for one month prior to study admission
Clareo Health | Clinical Assessment of Barley and Oat Phytochemicals
