Organic foods that reduce stomach gas include fennel, anise, turmeric, caraway and coriander, according to Brigham and Women's Hospital. Chamomile tea and peppermint tea give natural relief from stomach gas. Taking a walk and sitting up straight after a meal can reduce gas symptoms. People should seek medical attention when they experience gas with diarrhea, vomiting, heartburn or weight loss, or when the severity, location or frequency of their symptoms increase.
Fennel is an herb that produces aromatic yellow flowers, and people use its oil and ripened dried seeds to relieve colic in babies, intestinal gas and heartburn, according to WebMD. Fennel may aid digestion by helping the colon relax. People who have celery, carrot or mugwort allergies may have an allergic reaction to fennel, and some users develop skin sensitivity to light. Although fennel and anise are similar in appearance and taste, they are different herbs.
People use the oil, seed and occasionally the leaf and root from anise to relieve intestinal gas and stomach upset, explains WebMD. Some chemicals in anise may produce effects similar to estrogen and may lessen the effectiveness of birth control pills. Individuals allergic to fennel, coriander, caraway and dill should not use anise.
For thousands of years, people have used turmeric to relieve digestive problems, according to the University of Maryland Medical Center. Patients taking drugs that reduce stomach acid, such as famotidine and cimetidine, should exercise caution when using turmeric, as it can interfere with the drugs and increase stomach acid production.