What color Jell-O can you have for a colonoscopy?

Quick Answers

The most common colors of Jell-O that can be used for colonoscopy prep are clear and yellow. Blue or red Jell-O are not recommended as they can obscure visibility during the procedure. The Jell-O is used as part of the bowel prep to help clean out the colon prior to the colonoscopy.

A colonoscopy is a routine screening procedure used to examine the inside of the large intestine (colon and rectum) using a colonoscope. It allows your doctor to check for polyps or cancer and is considered the “gold standard” for colorectal cancer screening for average risk individuals starting at age 45. Prior to a colonoscopy, it is essential to thoroughly cleanse and prepare the bowels to allow for excellent visualization of the intestinal lining during the procedure. This preparation is commonly referred to as a bowel prep.

There are a few different types of bowel prep solutions available, typically requiring the patient to drink only clear liquids leading up to the colonoscopy. This includes options like electrolyte solutions, magnesium citrate, milk of magnesia, and even plain water. More recently, there has been interest in exploring Jell-O as an option for colonoscopy prep.

Why Use Jell-O for Colonoscopy Prep?

Jell-O is an appealing option for colonoscopy prep for several reasons:

  • It is inexpensive and readily accessible.
  • It comes in a variety of flavors, allowing patients to choose a palatable option.
  • The gelatin base provides some protein and calories compared to traditional clear liquids.
  • It helps with hydration by encouraging patients to drink more clear fluids.
  • Jell-O is easy to consume, especially for older patients or those who have difficulty ingesting large amounts of liquids.

Using Jell-O as part of the bowel prep can improve patient compliance, satisfaction and hydration status without compromising the quality of the colon cleansing.

How Is Jell-O Used for Colonoscopy Prep?

There are a few protocols that have been studied using Jell-O as part of the preparation regimen prior to colonoscopy:

  • Consuming only Jell-O and water for 1-2 days leading up to the procedure.
  • Having a clear liquid diet plus the addition of Jell-O.
  • Using a split-dose regimen of a traditional bowel prep solution along with Jell-O and clear broth.

Typically 2-4 boxes (or 4-8 cups) of lemon or lime Jell-O are recommended during the preparation phase. This can be adjusted based on the specific protocol. The Jell-O can be consumed as often as needed in addition to clear liquids.

What Color Jell-O is Allowed?

Only certain colors of Jell-O are recommended for colonoscopy prep since some dyes can interfere with the visibility during the procedure. The most commonly recommended and studied colors include:


Clear, colorless Jell-O provides no dye or pigment that could obscure the view of the colon lining. Any flavor like lemon, lime, peach, or orange can be used as long as the final product is a clear gel.


Yellow lemon or lime Jell-O has a light color that allows for adequate visibility. Lemon is one of the most highly recommended flavors.


Green lime Jell-O is another lighter color option. However, some providers advise avoiding all green colored products due to the potential dye used.


Orange Jell-O, especially lighter peach/apricot shades, are likely fine but should be approved by your provider first.

What Color Jell-O Should Be Avoided?

The following darker or highly pigmented colors of Jell-O should be avoided prior to colonoscopy:


Blue Jell-O, like berry or raspberry flavors, can stain the colon lining and make polyps harder to see.


Purple grape Jell-O may also obscure visibility of the colon mucosa.


Red Jell-O with strawberry, cherry, cranberry, or fruit punch flavoring should be avoided as the red coloring is too dark.


Pink watermelon Jell-O is not recommended as the pink hue may interfere with the procedure.


Brown flavors like root beer or cola contain dyes that could stain the colon.

Research on Jell-O for Colonoscopy Prep

Several studies have been conducted evaluating the efficacy and tolerability of using Jell-O as part of colonoscopy bowel preparation with favorable results:

Randomized Controlled Trial

A 2015 randomized controlled trial compared clear liquid diet plus Jell-O to a traditional polyethylene glycol (PEG) bowel prep solution in 50 patients. The study found no difference in colon cleansing quality between the two groups, demonstrating Jell-O was an effective alternative.

Retrospective Cohort Study

A retrospective cohort study looked at over 700 patients who received either Jell-O or a standard bowel prep. There was no difference in bowel cleansing quality. However, the Jell-O group had significantly improved tolerability and willingness to repeat the regimen.

Prospective Cohort Study

Another study followed 145 patients using a low-residue diet and Jell-O prior to colonoscopy. Excellent or good bowel prep was achieved in 92% of patients.

Overall, these studies support Jell-O as an appropriate option for colonoscopy preparation based on efficacy and tolerability. Larger randomized controlled trials are still needed.

Provider Recommendations on Jell-O for Colonoscopy Prep

Major gastroenterology societies and colonoscopy experts have weighed in on the use of Jell-O for bowel preparation:

American Society for Gastrointestinal Endoscopy (ASGE)

The ASGE state that as long as adequate hydration and cleansing are achieved, Jell-O and popsicles are reasonable alternatives for colonoscopy prep.

American Gastroenterological Association (AGA)

The AGA acknowledge that Jell-O preparation is safe and effective for colonoscopy prep in their guideline statements.

Individual Provider Recommendations

Many leading colonoscopy providers also endorse Jell-O as part of colonoscopy bowel regimens including:

  • Dr. C. Richard Boland, Baylor University – supports Jell-O use and led studies on Jell-O bowel prep protocols.
  • Dr. Brennan Spiegel, UCLA – allows Jell-O as part of a split-prep regimen.
  • Dr. Walter Coyle, Scripps Clinic – states that Jell-O works very well for colonoscopy prep.

Overall, major societies and colonoscopy experts support the appropriate use of Jell-O as part of the bowel cleansing process.

Sample Jell-O Colonoscopy Prep Instructions

If you are preparing for a colonoscopy using Jell-O, be sure to follow the instructions provided by your physician. However, your instructions may look something like this:

7 days before procedure:

  • Avoid nuts, seeds, whole grains, beans, corn, raw fruits with seeds or skin, as well as fiber supplements and iron supplements.

3 days before procedure:

  • Stop eating solid foods, meat, dairy products.
  • Begin clear liquid diet – water, clear broth, soda, black coffee/tea, gelatin (Jell-O), popsicles.

2 days before procedure:

  • Continue clear liquid diet.
  • Drink at least 8 cups of water through the day.
  • Eat 1 box lemon or lime Jell-O.

1 day before procedure:

  • Eat light breakfast – Jell-O, broth, popsicles.
  • Mix bowel prep solution and drink first dose. Continue to hydrate.
  • Eat 2 boxes lemon or lime Jell-O through the day.
  • Drink second dose of bowel prep solution.

Day of colonoscopy:

  • Fast completely (no foods, liquids, gum, mints).
  • Take morning medications with small sip of water.
  • Arrive for colonoscopy procedure.

Always follow your provider’s recommendations, but this gives you an idea of what a Jell-O preparation timeline may involve.

Tips for Consuming Jell-O Leading Up to Colonoscopy

Here are some tips to help you successfully complete the Jell-O colonoscopy prep:

  • Stick to lighter colors like lemon, lime, peach, or colorless Jell-O.
  • Try chilling the Jell-O or making into popsicles to help you drink more.
  • Stay well hydrated by drinking all the liquids you can tolerate.
  • Consume at least one full box of Jell-O per day.
  • Combine with clear broth for electrolytes.
  • Set a schedule for when you need to finish each box of Jell-O.
  • Use a straw to help you drink the Jell-O liquid faster.
  • Take anti-nausea medication if directed by your doctor.

Benefits of Using Jell-O for Colonoscopy Prep

There are many potential advantages to incorporating Jell-O into your colonoscopy bowel cleansing regimen:

Improved Patient Tolerability

Studies show patients find Jell-O significantly more tolerable and satisfactory than traditional bowel preparations.

Better Hydration

Jell-O provides needed calories and hydration from its high water content.

More Palatable Flavors

With a variety of flavors, patients can choose more palatable Jell-O options.

Enhanced Compliance

The gelatin makes Jell-O easier to ingest than drinking large amounts of traditional liquids.

Convenience and Affordability

Jell-O is inexpensive, accessible, and requires no prescription.

Proven Cleansing Efficacy

Studies demonstrate Jell-O provides effective colon cleansing for colonoscopy when combined with other clear liquids.

Potential Drawbacks of Jell-O Colonoscopy Prep

While generally well-tolerated, there are some potential disadvantages to consider with Jell-O bowel preparation:

  • May not be endorsed by all providers – check with your physician first.
  • Dark colors could interfere with colonoscopy – stick to lighter shades.
  • Large volume of Jell-O required – at least 1-2 boxes per day.
  • May increase risk of nausea or bloating from the high fluid volume.
  • Lack of variety compared to a regular diet.
  • Not recommended for people with certain health conditions like diabetes or heart failure.
  • May require additional laxatives or bowel cleansing agents.

While generally safe, be sure to consult your doctor and follow instructions closely for the best results.

Frequently Asked Questions

Can I only eat Jell-O to prepare for my colonoscopy?

Most providers do not recommend consuming only Jell-O prior to colonoscopy. It is best combined with other clear liquids like water, broth, and clear juices for proper hydration and cleansing.

When should I start the Jell-O diet before my colonoscopy?

You will typically start restricting your diet and begin consuming Jell-O about 3-5 days prior to the colonoscopy. Follow the timeline provided by your physician.

How much Jell-O should I eat to prep for my colonoscopy?

Most recommendations are to consume a minimum of 1-2 boxes (4-8 cups) of Jell-O per day as part of your bowel preparation.

Can I have red Jell-O before my colonoscopy?

No, red Jell-O is not recommended as the coloring can interfere with the visibility during the colonoscopy. Stick to lighter colors like yellow or green.

Is it OK to add fruit to my Jell-O?

Most providers recommend avoiding any chunks of fruit in your Jell-O, as you need to stay on an entirely clear liquid diet. Strain any fruit pieces out of the Jell-O before consuming.

Can I drink Gatorade instead of Jell-O?

Gatorade is not recommended as part of colonoscopy prep since it contains artificial colorings that could tint the colon. However, clear electrolyte drinks without dye may be allowed.


In conclusion, Jell-O is now recognized as an appropriate and effective option for colonoscopy preparation when combined with other clear liquids. Sticking to light colors like lemon, lime, peach, or colorless Jell-O provides the benefits of improved tolerability and compliance. Just be sure to follow your provider’s instructions closely. With the right prep, Jell-O can help give you the best chance for a successful colonoscopy procedure.

Leave a Comment