Amazing how everybody in this thread has posted their pet theories as to cause:

- insufficient fibre

- too much high fructose corn syrup

- too much milk

- too much citric acid

- toxins and parasites (gut cleanse!)

- washing chicken in chlorine (voiced as hypothetical)

- ultra-marathoners - maybe their supplements and too much carbs or dehydration?

- too much processed junk

- vitamin and mineral deficiencies

- radiation

- insufficient veggies