Is Miralax Vegan?

By Olivia

Many people following a vegan lifestyle are concerned about the ingredients in various medications and whether they are compatible with their dietary choices. One common question that arises is whether Miralax, a popular over-the-counter laxative, is vegan. In this article, we’ll explore the ingredients of Miralax and determine whether it is suitable for those following a vegan diet.

Understanding Miralax

Miralax is a brand name for the drug polyethylene glycol 3350 (PEG 3350). It is a type of laxative that works by increasing the amount of water in the stool, softening it and making it easier to pass. It is primarily used to treat occasional constipation and for bowel preparation before certain medical procedures.

Ingredients in Miralax

While Miralax is primarily composed of polyethylene glycol (PEG), it may also contain small amounts of other ingredients. These additional substances are typically additives or excipients that help to stabilize the medication or improve its taste, texture, or appearance. Let’s take a closer look at these ingredients:

  • Polyethylene Glycol (PEG): The main active ingredient in Miralax is polyethylene glycol, a synthetic compound commonly used as a laxative. PEG is generally considered vegan-friendly as it is derived from petroleum sources and does not contain animal-derived ingredients.
  • Excipients: Miralax may contain minimal amounts of inactive ingredients, such as citric acid and potassium bitartrate, which act as flavoring agents or help to maintain the product’s acidity. These excipients are typically derived from non-animal sources and do not raise concerns for vegans.

Overall, based on the available information, the primary ingredients in Miralax do not appear to pose any issues for those adhering to a vegan dietary lifestyle.

Potential Concerns and Alternatives

While the main ingredients in Miralax seem to be vegan-friendly, some individuals might still have concerns or prefer to explore alternative options. Here are some potential concerns and alternatives:

  • Gelatin Capsules: Some brands of PEG 3350 may come in gelatin capsules, which are derived from animal sources. Vegans may choose to look for alternative brands that use vegetarian or vegan-friendly capsule materials, such as cellulose or pullulan.
  • Animal Testing: Although not directly related to the vegan status of the product, vegan individuals might also consider whether the medication or its ingredients have been tested on animals. Those with concerns about animal testing can seek out cruelty-free alternatives or contact the manufacturer for information on their testing practices.


Based on the information available, Miralax itself, including its main active ingredient polyethylene glycol, appears to be vegan-friendly. However, individuals who strictly follow a vegan lifestyle may want to verify the capsule materials and may consider alternative laxative options that meet their specific requirements. As always, it is recommended to consult with a healthcare professional or pharmacist for personalized advice and guidance regarding specific dietary concerns.