Who Should Avoid Peppermint Oil Capsules? Medical Warnings & Advice Peppermint capsules are widely recognized for their benefits in easing digestive discomfort, especially symptoms related to irritable bowel syndrome (IBS). These supplements, derived from peppermint oil, offer natural relief through their antispasmodic and calming properties. However, while peppermint capsules can be helpful for many, they’re not suitable for everyone. Understanding who...