Gastrointestinal Side Effects. Using turmeric in your cooking is considered safe and unlikely to cause side effects. Taking large doses of the spice or of supplements can result in gastrointestinal side effects. The most common gastrointestinal side effects are stomachache, gas, nausea and indigestion. Talk to your doctor and reduce the amount of turmeric you're taking if you experience any of these side effects.
Your stomach is an acidic environment with a low pH of between 1 and 3. Parietal cells in the wall of the stomach secrete hydrochloric acid (HCl). If your esophageal sphincter; basically the lid to your stomach; isnât closed properly, HCl will creep into your esophagus resulting in heartburn.
By Anne Marie Helmenstine, Ph.D. Your stomach secretes hydrochloric acid, but the pH of your stomach isn't necessarily the same as the pH of the acid! The pH of your stomach varies, from 1-2 up to 4-5. When you eat, the stomach releases proteases and hydrochloric acid to aid in digestion.