Direct Answer: While you’re constipated, steer clear of diuretics that dehydrate and get rid of fluids, depressants that slow down muscle contractions or gas producers that block colonic transit. The main beverages that you’ll want to quit cold turkey though are alcohol (it suppresses vasopressin meaning you’re peeing out water quicker, yikes!), sugary sodas which interfere with functioning in the gut due to high levels of sugar pulling water into the gut honesty not a great big bacteria propagator), and dairy milk for those who are sensitive to A1 beta-casein. And despite what you might have heard, coffee is not off limits : “While caffeine has a mild diuretic effect, the action of colon muscle cells is usually stronger,” Gerbstadt says, provided you drink a glass of water with it. But black tea does have tannins, which can lead to stool binding and constipation.
1. The Acute Case: Ending the Present “Drought” at Once.
If you are currently constipated and miserable, what you want to do is avoid drying out the colon any more. The standard is a simple one: “Avoid alcohol,” but the mechanism is more specific: Alcohol shuts down the hormone that tells your kidneys to hold onto water.
The Counter-Intuitive Truth:
A lot of people have “diet” sodas in order to be healthier about it while they’re constipated, too. This is a mistake. Artificial sweeteners, such as aspartame or sucralose, can mess with your gut bacteria. They don’t dehydrate you the way alcohol does, but they do have a bloating effect. An overly full intestine is an immobile one, and the pressure of the gas pushes against our poor muscles during attempts to do that wave-like peristalsis thing we humans do in order to poo.
Action PlanWe have to stretch out the post-rehydrate period a little, which we can accomplish with a protocol my coach, Javier Gonzales of Denver’s Total Cyclist, calls his “Hydration Bridge.”
- You needto quit IMMEDIATELY: Just stop all beer, wine and spirits. The release of Vasopressin (Anti-Diuretic Hormone) is shut off by even one glass of wine, making you pee out more than you took in.
The Coffee Calibration: If you drink coffee on a regular basis, do not go cold turkey. Caffeine withdrawal may stress the body and restrict bowels more.
Step: Have a small cup of coffee.
Then: Immediately follow it up with 16oz/500ml of warm water. This utilizes the gastrocolic reflex — the gut’s wake-up call (without the net dehydration).
The Tannin Check Quit strong black tea to drink. Though cramping scape is questionable, the tannins (compounds in tea that make it taste dry/astringent) can bind proteins and dessicate elasticule matrix.
2. The Chronic IBS Patient: Finding, and Getting Rid of Hidden Triggers
For some people battling long-term symptoms, the enemy is inflammation or “mechanical” bloating.
The Counter-Intuitive Truth:
You may be under the impression that Carbonated Water (Sparkling Water) is nothing but some water and is absolutely fine. But for those with IBS, the CO2 gas that enters their gut blows up. This then corresponds to “air locks” in the colon. The pressure signals pain to the brain and the gut seems to freeze up in response, like a turtle withdrawing into its shell. Also, Frie said some juices that are not SCD can actually be good for an IBS-D flare because not all sugars act the same way in all people–for example “healthy” 100% Apple Juice is high in Fructose and yet low in Sorbitol. It’s this ratio that makes apple juice hard to digest by a lot of people and results in fermentation and gas instead of a bowel movement.
What You Can Do: The Liquid Elimination Technique
The Fizz Test: Remove all fizzy drinks for 72 hours. Switch to still, room-temperature water. In sensitive people, cold water can trigger the vagus nerve, which runs from the brain to the abdomen and is involved in digestion.
The A1 vs. A2 Switch: If you enjoy latte or milk tea, the culprit may be protein, not lactose.
Logic: A1 beta-casein, which is present in most store-bought milk, degrades to BCM-7 [beta-casomrphin-7], an exogenous opioid peptide that can slow transit time (much like pain killers cause constipation).
Stage: Use A2 milk (often labeled as such or from Goat/Sheep sources) that does not generate this slowing peptide.
Filter FODMAPS: Lay off the apple and grape juice. Switch them out for Pear or Prune juice instead. Pears for constipation relief: Pear juice contains sorbitol, which is a natural and gentle laxative that draws water into the bowel to soften stool.
3. Pregnant and Lactating Women: Safety and Absorption
Pressure from the uterus and the hormone progesterone also decelerate digestion. The idea here is to steer clear of drinks that inhibit absorption of nutrients or exacerbate the hormonal slow-down.
The Counter-Intuitive Truth:
And of course, iron supplements are known to cause constipation. A lot of pregnant women wash down their prenatal vitamins with tea or milk. This is the error. The calcium in milk and tannins in tea combine with the iron to form an insoluble “soap-like” complex in the gut, which is extremely difficult to excrete. It’s not just the drink; it’s when you drink.
Action Plan: The Citrus Pairing Approach
The Two Hour Rule: Don’t drink cow’s milk or tea within two hours of taking your prenatal vitamin or iron supplement.
The Vitamin Vehicle: Haul out the iron, down it with 4oz Orange Juice (no symptoms? Vitamin C acidifies the environment in the stomach so that when you ingest iron, it will be absorbed more completely by the body rather than just sitting in your gut and resulting in constipation.
Herbal Consideration Please do not take “Smooth Move” or any Senna based teas unless directed to. Because they result in more regular bowel movements, they produce uterine contractions and can be habit-forming, leaving the bowel “lazy” after the pregnancy.
4. Parents of Small Children: The Juice Trap
Michael J. Smith, the director of microbiology and immunology at the McGovern Medical School at UTHealth in Houston. Parents often panic and push fluids, Dr. Fitzgerald said. But a child’s gut is smaller and more sensitive to sugar loads.
The Counter-Intuitive Truth:
Bananas, rice, apple sauce and toast are an antiquated diet that actually contribute to constipation. Especially with things like clear Apple Juice because that is what kids are often given but it doesn’t have the fruit which contains fiber. The high amount of sugar, without fiber, causes insulin to spike and can cause a “crash” in gut motility. Too much cow’s milk is also the #1 reason for chronic constipation in toddlers, not uncommon because they are allergic to or intolerant of dairy protein.
Action Plan: The Dairy Audit & P-Swap (Aka Nutritional Balancing) So, let’s jump right in….
A Rule of Thumb: Limit cow’s milk to less than 16-20 oz per day in toddlers. There is too much calcium so the stool packs hard and chalky.
The “P” Swap: Cut out Apple and Banana smoothies/juices. Use instead the “P” fruits: Pear, Peach and Prune juices.
Ratio: Water down these juices with 50% water. A child’s stomach is not able to tolerate the high sugar concentration (osmolality) of full-strength juice, which can result in cramping rather than relief.
Eliminate Cocoa: No more hot cocoa or chocolate milk. The cocoa substance can inhibit peristalsis in young children.
5. The Elderly & Their Caregivers: The Thirst Sensation
The thirst sensation decreases with age. The elderly, who are frequently chronically dehydrated but “don’t feel like drinking.”
The Counter-Intuitive Truth:
If an elderly person is drinking thickened liquids (for dysphagia/swallowing issues), the “thickener” will (many are starch-based) absorb all of t he “free water” in your drink. You think they’re getting 8oz of water, but the body might only be using 4oz because the other is bound in that thickner sludge which hardens in your gut. And when salt levels are low (hyponatremia), consuming plain water tends not to help, because the body simply pees it out right away in order to maintain balance.
Action Plan: The Electrolyte-Enhanced Protocol
Management of Thickeners: Change the thickeners from starch-based to Xanthan gum- based if the person has been using starch-based thickeners. Xanthan gum is stable and less constipating than starch.
Micro-Sipping: It is not necessary to drink large oversized glasses of water (if uncomfortable for your elderly loved one). Consider offering 2oz fluid every 30 minutes.
The Sodium Assistant: Don’t just present water. Offer warm broths or water with a pinch of sea salt and lemon. The electrolytes assist to hold the fluid in the tissues rather than flush it through the kidneys at once.
6. Gut Health: Lovers Of Fermentation The Fermenting Lie
This crowd seeks optimization but frequently overdoes “healthy” trends.
The Counter-Intuitive Truth:
Kombucha and Kefir are advertised as gut healers. But if you suffer from constipation that is a reflection of SIBO (Small Intestinal Bacterial Overgrowth) or slow transit, adding billions of bacteria and fermentable sugars via Kombucha is like adding gasoline to your digestion. The sugars ferment in the small intestine (where they shouldn’t be), producing Methane gas. Methane gas is a paralyzing agent to the nerves of the colon.
The “Zero-Ethanol” & Low-Ferment ResetAction Plan:
Cease Probiotics: Avoid Kombucha, Kefir, and Kvass for 2 weeks.
The Alcohol Hurdle: Say goodbye to red wine. Resveratrol benefits are also wiped out by ethanol, which damages the cells in the lining of your intestines increasing intestinal permeability (“leaky gut”). This inflammation tells the muscles of the gut to cease movement when they try to do so, lest “leakage” (i.e., waste) occur through the bloodstream.
Magnesium Plan: Replace fermented drinks with water mixed with Magnesium Citrate powder in the evening. This is an osmotic laxative, drawing the water in without necessarily feeding the bacterial overgrowth.
Frequently Asked Questions
I am constipated, can coffee cause this if I am dehydrated?
No. And although coffee is a mild diuretic, the activity of muscles in the colon (the gastrocolic reflex) would also help people to poop. To counter act the diuretic effect, it is necessary to drink a small coffee cup of water and follow with 16oz (500ml) of hot (not lukewarm) water.
Why are diet pops bad if they don’t have sugar in them?
Diet sodas, meanwhile, are sweetened with artificial sweeteners like aspartame or sucralose that can confuse the gut and lead to bloat. The gas pressure in the bowel then physically restrains peristalsis (muscle contraction), immobilizing bowel movement and causing it to stop.
Does children clear apple juice help with constipation?
Most likely not Clear apple juice is devoid of fiber and has a pretty high fructose-to-sorbitol ratio, which triggers fermentation and gas over BM’s. The best are Pear, Peach or Prune juices since they are high in sorbitol and will not cause unnecessary bloating.
Will drinking carbonated or sparking water make my constipation worse?
Yes, especially for people with IBS. The CO2 gas in carbonated water forms “air locks” that buildup the pressure in your gut. That sends pain signals to the brain, which then induces the gut to freeze and stop processing food rather than moving waste along.
Is fermented drinks such as Kombucha always good for peristalsis of gut?
Not always. So, if constipation is due to Small Intestinal Bacterial Overgrowth (SIBO), adding those fermentable sugars through something like Kombucha can feed bacteria that produce methane gas. Methane is a paralytic to the nerves of the colon, thus it slows down transit even more.
References
- Alcohol ADH and Vasopressin: Popowski, L. A., et al. (2001). “Influence of alcohol on renal water and electrolyte excretion”. Journal of Applied Physiology. The research showed that alcohol has a net dehydrating effect and for every 1g of alcohol drunk, urine excretion rose by 10ml – which is the equivalent to 20serving of coffee.
- A1 vs A2 Milk Protein: Jianqin, S., et al. (2016). “Gut function with A2 and A1 beta-casein in pre-term infants.” Nutrition Journal. This was a randomized crossover trial and what it showed is that compared to A2 milk, A1 beta-casein caused delayed gastrointestinal transit time (bowels moving slower) and looser stools in some, but more notably significant constipation-related inflammation in some.
- Caffeine and Motility: Rao, S.S., et al. (1998). “Is coffee a colonic stimulant?” European Journal of Gastroenterology and Hepatology. In the present study, caffeinated coffee was found to increase colonic motor activity 60% compared with water and 23% compared with decaffeinated coffee which may support its use for supplementation of bowel movements despite mild confirmative diuretic conditions.
- Methane and Constipation (SIBO): Pimentel, M., et al. (2006). “Microorganism-derived methane gas inhibits small intestinal transit and increases small intestinal contractile activity.” American Journal of Physiology-Gastrointestinal and Liver Physiology. This study first demonstrated the cause-effect relationship between methane gas (resulting from sugar fermentation similar to that which occurs in juices or kombucha) and physical bowel transit slowing.
