It shouldn't. All food colouring is made of some natural materials and chemicals. The chemicals would be the same or very similar no matter what the colour. If you are having and upset stomach it's probably from something else or you could be mildly allergic to something in the food colouring.
no.
From past experiences it has almost always upset my stomach in a bad way.
Green tea is generally safe for everyone, but some disadvantages are that it can cause constipation and an upset stomach in some people. In very rare cases, green tea can cause liver issues.
MSG
Yes
it depends, if you work TOO hard you will get an upset stomach, along with if you are really dehydrated you may feel nauseas...
In most cases, patients with fibromyalgia are prescribed anti-inflammatory drugs. It is those drugs that cause the stomach upset.
Green tea contains caffeine, a central nervous system (CNS) stimulant that can cause restlessness, irritability, difficulty sleeping, tremor, heart palpitations, loss of appetite, and upset stomach.
Unlikely
eating an iron
eating too much or stress
The sap can cause skin irritations and the plant can cause stomach upset if ingested