Yes, peppermint oil capsules are generally safe and effective for relieving bloating, especially if associated with Irritable Bowel Syndrome (IBS). They work by relaxing the muscles of your digestive tract. For the best results and to prevent heartburn, choose enteric-coated capsules, which bypass the stomach and dissolve in the intestines. However, you should avoid them if you suffer from acid reflux (GERD), a hiatal hernia, or gallbladder issues, as peppermint can worsen these conditions. Please consult your doctor before starting them, especially if you are pregnant, nursing, or taking other medications.