Which of the following is true about snacks

Excessive consumption of natural foods has no effect when ,dietary foods does.they are bad in lower cholesterol and higher in good cholesterol.

Of that are from eating black  foods or iron supplements. the most common condition causing  it is a bleeding ulcer.  black poop caused by blood indicate a problem in the upper digestive tract.     along with pain, vomiting, or diarrhea is cause to see a doctor right go see a doctor