Patient Resources
Colonoscopy Prep Guide: Day-by-Day Food List
A clean colon means a clear, accurate exam — and a good prep is the single most important thing you can do before your procedure. This guide walks you through exactly what to eat (and what to avoid) starting 5 days out, all the way through the day after.
Important: This is a general guide. Always follow the exact written prep instructions from your doctor — they may differ slightly based on the type of prep you were prescribed (GoLYTELY, MoviPrep, SUPREP, MiraLAX/Gatorade, etc.) or any medical condition you have.
Prep at a glance
- 15–3 days beforeSwitch to a low-fiber diet
- 22 days beforeSmaller portions, no raw produce
- 3Day beforeClear liquids only — no solid food
- 4Evening beforeStart your bowel prep solution
- 5Day ofNothing by mouth after the cutoff
5 to 3 days before: low-fiber diet
High-fiber foods take longer to clear out. Switching to a low-fiber (low-residue) diet now makes the actual prep much easier and more effective.
| Category | You CAN eat / drink | AVOID |
|---|---|---|
| Grains | White bread, white rice, plain pasta, refined cereals (Rice Krispies, Corn Flakes) | Whole grains, brown rice, oatmeal, bran cereal, quinoa, granola, seeded breads |
| Fruits | Peeled apples, ripe bananas, melon (no seeds), canned peaches or pears (no skin) | Berries, grapes, raisins, dried fruit, fruit with skin, seeds, or pulp |
| Vegetables | Well-cooked, peeled vegetables: potatoes (no skin), carrots, green beans, zucchini | Raw vegetables, salads, corn, peas, broccoli, cauliflower, leafy greens, beans, lentils |
| Protein | Chicken, turkey, fish, eggs, tofu, tender lean beef | Tough or fatty meat, sausage with seeds, nuts, seeds, popcorn |
| Dairy | Milk, plain yogurt (no fruit chunks or seeds), mild cheese | Yogurt with granola, nuts, or seeds |
2 days before: tighten things up
Stay on the low-fiber diet and start eating smaller meals. Drink plenty of water all day — staying hydrated makes the next day much more comfortable.
| Category | You CAN eat / drink | AVOID |
|---|---|---|
| Grains | White bread, white rice, plain pasta, saltines | Anything whole-grain, seeded, or high-fiber |
| Fruits & Vegetables | Peeled, well-cooked only — small portions | All raw produce, skins, seeds, corn, beans |
| Protein | Eggs, chicken, fish, tofu — no nuts or seeds | Red meat in large portions, anything with seeds |
| Drinks | Water, clear juice, sports drinks, coffee or tea (no milk) | Anything red, purple, or blue. No alcohol. |
The day before: clear liquids only
No solid food today. A clear liquid is anything you can see through. If you can't read newsprint through it, it doesn't count.
| Category | You CAN eat / drink | AVOID |
|---|---|---|
| Allowed (clear liquids only — all day) | Water • clear broth (chicken, beef, vegetable) • apple or white grape juice • lemonade without pulp • plain coffee or tea (no milk or creamer) • sports drinks (Gatorade, Powerade — yellow, orange, or clear) • clear sodas (Sprite, ginger ale) • Jell-O (yellow, orange, or green) • popsicles (no fruit pieces, no red/purple/blue) | Anything red, purple, or blue • milk, cream, or non-dairy milk • orange juice with pulp • smoothies • alcohol • all solid food |
Starting your bowel prep
Your prep is usually split into two doses — one in the evening the day before, and one early in the morning the day of. Mix and chill the solution ahead of time (cold tastes better), drink each glass over 10–15 minutes, and stay near a bathroom. Sucking on a hard candy or lemon between glasses can help with the taste.
You're ready when what comes out is clear or pale yellow with no solid pieces.
Day of the procedure
Finish your second dose of prep on the schedule we gave you (usually 4–6 hours before arrival). After your cutoff time, nothing by mouth — no water, gum, mints, or candy. Bring your ID, insurance card, and a driver. You will not be allowed to drive yourself home after sedation.
| Category | You CAN eat / drink | AVOID |
|---|---|---|
| Up to 2–4 hours before procedure | Continue clear liquids as directed by your prep instructions — usually water and clear electrolyte drinks until the cutoff time given by our office. | Nothing by mouth after your prep cutoff time — including water, gum, mints, and hard candy. |
After your colonoscopy
You'll feel a little gassy or bloated for an hour or two — that's normal and expected. Eat lightly at first, then ease back into your usual diet.
| Category | You CAN eat / drink | AVOID |
|---|---|---|
| First few hours after | Water, clear broth, crackers, toast, plain rice, applesauce, bananas | Heavy, greasy, or spicy foods • alcohol • driving or operating machinery for 24 hours |
| Rest of the day | Light, easy-to-digest meals — soup, eggs, plain pasta, grilled chicken | Large meals, rich foods, raw vegetables, or anything that usually upsets your stomach |
| Next day | Resume your normal diet unless your doctor told you otherwise | If a polyp was removed, you may be told to avoid nuts, seeds, popcorn, and alcohol for a few days |
Frequently asked questions
- What can you not eat 5 days before a colonoscopy?
- Starting 5 days before your colonoscopy, avoid high-fiber foods: nuts, seeds, popcorn, raw fruits and vegetables, whole grains, brown rice, beans, lentils, corn, and any food with skins or hulls. Stick to a low-fiber diet of white bread, white rice, plain pasta, well-cooked peeled vegetables, tender meats, eggs, and dairy without nuts or fruit chunks.
- What can I eat the day before a colonoscopy?
- The day before your colonoscopy you can only have clear liquids — no solid food. That means water, clear broth, apple or white grape juice, plain coffee or tea (no milk), Jell-O and popsicles in yellow, orange, or green, and sports drinks. Avoid anything red, purple, or blue, and anything with milk or pulp.
- What to eat 2 days before colonoscopy?
- Two days before, continue a low-fiber diet and start cutting back portion sizes. White bread, white rice, eggs, chicken, fish, well-cooked peeled vegetables, and clear juices are all fine. Avoid raw produce, whole grains, nuts, seeds, and red or purple drinks.
- Why can't I have red, purple, or blue liquids?
- Red, purple, and blue dyes can stain the lining of the colon and look like blood during the procedure. This makes it harder for your doctor to see clearly and can lead to a false alarm or a repeat colonoscopy.
- What can I eat after a colonoscopy?
- Start with light, easy-to-digest foods: water, clear broth, crackers, toast, plain rice, applesauce, and bananas. Most patients can return to a normal diet the next day. If a polyp was removed, your doctor may ask you to avoid nuts, seeds, popcorn, and alcohol for a few days.
- Can I drink coffee before a colonoscopy?
- Yes — black coffee or tea (no milk, no non-dairy creamer) is allowed during the clear liquid day. Stop all liquids by the cutoff time your doctor gives you, usually 2–4 hours before the procedure.
Take the first step. We'll guide you through the rest.
Most colon cancers are preventable when caught early. Schedule your screening today — or call us with questions. We're happy to walk you through what to expect.