One way in, four ways out. Yep take a moment to consider. The mouth is the only way to ingest food, and but the body has four ways to excrete. 1. Defecate, 2. Urinate, 3. Transpiration through skin, the presence of spots, rash and irritations in the skin can be a sign of bad digestion, 4. Breath, which through poor digestion you can have the symptom of bad breath
The fact that there are so many ways for the body to excrete highlights the importance for the removal and wastes from our body. The body is capable of fasting for 40 days (average of course depends on the person!), but without excretion the body is likely to be slowly poisoned in a much shorter period of time.