i m 29 year old,i have no any diseases i hav done whole body test about 7 months ago,all was good, now since 2 month i m seeing a problem that my feces are comming black,first one mont comming 100% back colour,but after getting tablet SILLIVER by Abbot Company comming now like black brown type,may b this happend due to taking energy powder with gym exercises. plz help me/