p & B SHAKE AND RED FECAL MATTER

I DID A GALLBALDDER CLENSE FRIDAY. I HAVE NOT HAD MUCH BOWEL MOVEMENTS. I ALWAYS HAVE 3 TO 4 A DAY. TODAY I HAD AN FRESH JUICE MADE AT AN HEALTH FOOD STORE. IT HAD CARROT JUICE, BEET JUICE, APPLE JUICE, AND WHEAT GRASS. NOW MY BOWEL MOVEMENT IS RED. WHY??????