Hi, I use a grande black Starbucks coffee in the morning to help me have a BM. It works wonders.(Plus I take pyslliym husks and flax and wheatbran for breakfast) However the coffee really disagrees with my skin. It inflames it a little and doesn't help my eczema. Is there an alternate type of colon stimulant drink, that doesn't have caffeine in it, that other people have found helps with a BM in the morning? (Not Senna)Thanks for any suggestions.