Why does alcohol make my poo go weird?

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As we enter the festive season it’s a good time to think about what all those celebratory alcoholic drinks can do to your gut.

Alcohol can interfere with the time it takes for food to go through your gut (also known as the “transit time”). In particular, it can affect the muscles of the stomach and the small bowel (also known as the small intestine).

So, how and why does alcohol make your poos goes weird? Here’s what you need to know.

Diarrhoea and the ‘transit time’

Alcohol’s effect on stomach transit time depends on the alcohol concentration.

In general, alcoholic beverages such as whisky and vodka with high alcohol concentrations (above 15%) slow down the movement of food in the stomach.

Beverages with comparatively low alcohol concentrations (such as wine and beer) speed up the movement of food in the stomach.

These changes in gut transit explain why some people can get a sensation of fullness and abdominal discomfort when they drink vodka or whisky.

How long someone has been drinking a lot of alcohol can affect small bowel transit.

We know from experiments with rats that chronic use of alcohol accelerates the transit of food through the stomach and small bowel.

This shortened transit time through the small bowel also happens when humans drink a lot of alcohol, and is linked to diarrhoea.

Alcohol can also reduce the absorption of carbohydrates, proteins and fats in the duodenum (the first part of the small bowel).

Alcohol can lead to reduced absorption of xylose (a type of sugar). This means diarrhoea is more likely to occur in drinkers who also consume a lot of sugary foods such as sweets and sweetened juices.

Chronic alcohol use is also linked to:

This means chronic alcohol use may lead to diarrhoea and loose stools.

How might a night of heavy drinking affect your poos?

When rats are exposed to high doses of alcohol over a short period of time, it results in small bowel transit delay.

This suggests acute alcohol intake (such as an episode of binge drinking) is more likely to lead to constipation than diarrhoea.

This is backed up by recent research studying the effects of alcohol in 507 university students.

These students had their stools collected and analysed, and were asked to fill out a stool form questionnaire known as the Bristol Stool Chart.

The research found a heavy drinking episode was associated with harder, firm bowel motions.

In particular, those who consumed more alcohol had more Type 1 stools, which are separate hard lumps that look or feel a bit like nuts.

The researchers believed this acute alcohol intake results in small bowel transit delay; the food stayed for longer in the intestines, meaning more water was absorbed from the stool back into the body. This led to drier, harder stools.

Interestingly, the researchers also found there was more of a type of bacteria known as “Actinobacteria” in heavy drinkers than in non-drinkers.

This suggests bacteria may have a role to play in stool consistency.

But binge drinking doesn’t always lead to constipation. Binge drinking in patients with irritable bowel syndrom (IBS), for example, clearly leads to diarrhoea, nausea and abdominal pain.

What can I do about all this?

If you’re suffering from unwanted bowel motion changes after drinking, the most effective way to address this is to limit your alcohol intake.

Some alcoholic beverages may affect your bowel motions more than others. If you notice a pattern of troubling poos after drinking certain drinks, it may be sensible to cut back on those beverages.

If you tend to get diarrhoea after drinking, avoid mixing alcohol with caffeinated drinks. Caffeine is known to stimulate contractions of the colon and so could worsen diarrhoea.

If constipation after drinking is the problem, then staying hydrated is important. Drinking plenty of water before drinking alcohol (and having water in between drinks and after the party is over) can help reduce dehydration and constipation.

You should also eat before drinking alcohol, particularly protein and fibre-rich foods.

Food in the stomach can slow the absorption of alcohol and may help protect against the negative effects of alcohol on the gut lining.

Is it anything to worry about?

Changes in bowel motions after drinking are usually short term and, for the most part, resolve themselves pretty efficiently.

But if symptoms such as diarrhoea persist beyond a couple of days after stopping alcohol, it may signify other concerning issues such as an underlying gut disorder like inflammatory bowel disease.

Researchers have also linked alcohol consumption to the development of irritable bowel syndrome.

If problems persist or if there are alarming symptoms such as blood in your stool, seek medical advice from a general practitioner.

Vincent Ho, Associate Professor and clinical academic gastroenterologist, Western Sydney University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

The Conversation

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  • How Much Does A Vegan Diet Affect Biological Aging?

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Slow Your Aging, One Meal At A Time

    This one’s a straightforward one today, and the ““life hack” can be summed up:

    Enjoy a vegan diet to enjoy younger biological age.

    First, what is biological age?

    Biological age is not one number, but a collection of numbers, as per different biomarkers of aging, including:

    • Visual markers of aging (e.g. wrinkles, graying hair)
    • Performative markers of aging (e.g. mobility tests)
    • Internal functional markers of aging (e.g. tests for cognitive decline, eyesight, hearing, etc)
    • Cellular markers of aging (e.g. telomere length)

    We wrote more about this here:

    Age & Aging: What Can (And Can’t) We Do About It?

    A vegan diet may well impact multiple of those categories of aging, but today we’re highlighting a study (hot off the press; published only a few days ago!) that looks at its effect on that last category: cellular markers of aging.

    There’s an interesting paradox here, because this category is:

    • the most easily ignorable; because we all feel it if our knees are giving out or our skin is losing elasticity, but who notices if telomeres’ T/S ratio changed by 0.0407? ← the researchers, that’s who, as this difference is very significant
    • the most far-reaching in its impact, because cellular aging in turn has an effect on all the other markers of aging

    Second, how much difference does it make, and how do we know?

    The study was an eight-week interventional identical twin study. This means several things, to start with:

    • Eight weeks is a rather short period of time to accumulate cellular aging, let alone for an intervention to accumulate a significant difference in cellular aging—but it did. So, just imagine what difference it might make in a year or ten!
    • Doing an interventional study with identical twin pairs already controlled for a lot of factors, that are usually confounding variables in population / cohort / longitudinal / observational studies.

    Factors that weren’t controlled for by default by using identical twins, were controlled for in the experiment design. For example, twin pairs were rejected if one or more twin in a given pair already had medical conditions that could affect the outcome:

    ❝Inclusion criteria involved participants aged ≥18, part of a willing twin pair, with BMI <40, and LDL-C <190 mg/dL. Exclusions included uncontrolled hypertension, metabolic disease, diabetes, cancer, heart/renal/liver disease, pregnancy, lactation, and medication use affecting body weight or energy.

    Eligibility was determined via online screening, followed by an orientation meeting and in-person clinic visit. Randomization occurred only after completing baseline visits, dietary recalls, and questionnaires for both twins❞

    ~ Dr. Varun Dwaraka et al. ← there’s a lot of “et al.” to this one; the paper had 16 collaborating authors!

    As to the difference it made over the course of the 8 weeks…

    ❝Various measures of epigenetic age acceleration (PC GrimAge, PC PhenoAge, DunedinPACE) were assessed, along with system-specific effects (Inflammation, Heart, Hormone, Liver, and Metabolic).

    Distinct responses were observed, with the vegan cohort exhibiting significant decreases in overall epigenetic age acceleration, aligning with anti-aging effects of plant-based diets. Diet-specific shifts were noted in the analysis of methylation surrogates, demonstrating the influence of diet on complex trait prediction through DNA methylation markers.❞

    ~ Ibid.

    You can read the whole paper here (it goes into a lot more detail than we have room to here, and also gives infographics, charts, numbers, the works):

    Unveiling the epigenetic impact of vegan vs. omnivorous diets on aging: insights from the Twins Nutrition Study (TwiNS)

    Were they just eating more healthily, though?

    Well, arguably yes, as the results show, but to be clear:

    The omnivorous diet compared to the vegan diet in this study was also controlled; both groups were given a healthy meal plan for their respective diet. So this wasn’t a case of “any omnivorous diet vs healthy vegan diet”, but rather “healthy omnivorous diet vs healthy vegan diet”.

    Again, the paper itself has the full details—a short version is that it involved a healthy meal kit delivery service, followed by ongoing dietician involvement in an equal and carefully-controlled fashion.

    So, aside from that one group had an omnivorous meal plan and the other vegan, both groups received the same level of “healthy eating” support, guidance, and oversight.

    But isn’t [insert your preferred animal product here] healthy?

    Quite possibly! For general health, general scientific consensus is that eating at least mostly plants is best, red meat is bad, poultry is neutral in moderation, fish is good in moderation, dairy is good in moderation if fermented, eggs are good in moderation if not fried.

    This study looked at the various biomarkers of aging that we listed, and not every possible aspect of health—there’s more science yet to be done, and the researchers themselves are calling for it.

    It also bears mentioning that for some (relatively few, but not insignificantly few) people, extant health conditions may make a vegan diet unhealthy or otherwise untenable. Do speak with your own doctor and/or dietician if unsure.

    See also: Do We Need Animal Products To Be Healthy?

    We would hypothesize, by the way, that the anti-aging benefits of a vegan diet are probably proportional to abstention from animal products—meaning that even if you simply have some “vegan days”, while still consuming animal products other days, you’ll still get benefit for the days you abstained. That’s just our hypothesis though.

    Take care!

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  • Why Do We Have Pores, And Could We Not?

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    It’s Q&A Day at 10almonds!

    Have a question or a request? We love to hear from you!

    In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!

    As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!

    So, no question/request too big or small

    ❝Do we really need pores, and why are they bigger on the face?❞

    Pores secrete sweat or sebum (there are different kinds of pores for each).

    If we didn’t have sweat pores, we’d be unable to sweat, which superficially may seem like a bonus, but it’d make us prone to overheating (like dogs, pigs, and other mammals that cannot sweat).

    If we didn’t have sebum pores (usually called hair follicles, which are supplied by a sebaceous gland), we’d be completely hairless, and also unable to supply our skin with natural oils that keep it healthy. So we’d have no hair and very unhappy skin.

    Which is ironic, because to believe beauty magazines, we must at all costs minimize our pores (and indeed, interventions like botox* can kill them).

    *Let’s give that its full name though:

    Botulinum Neurotoxin Type A in the Treatment of Facial Seborrhea and Acne: Evidence and a Proposed Mechanism

    Suffice it to say, we do not recommend getting injected with neurotoxins unless it is truly necessary to ward off a greater harm.

    As for being bigger on the face, they need not be, but sebaceous glands are more active and numerous there, being most active and numerous in the face/forehead—which is why oily skin is more likely to appear there than other parts of the body.

    If your facial sebaceous glands are too active for your liking…

    …there are ways to reduce that, a simple and relatively gentle way (relative, for example, botox) is with retinoids, including retinols or retinoic acids. Here’s some of the science of that; the paper is about treating acne, but the mechanism of action is the same (down-regulating the sebaceous glands’ action):

    The treatment of severe cystic acne with 13-cis-retinoic acid: evaluation of sebum production and the clinical response in a multiple-dose trial

    The potential side-effects, however were noted as:

    • Cheilitis
    • Desquamation of the skin
    • Pruritus

    Which, in translation from sciencese, means:

    • Chapped lips
    • Flaky skin
    • Itchiness

    Which aren’t necessarily fun, which is why with retinoids are best taken in very small doses at first to see how your skin reacts.

    Remember when we said what your skin would be like without pores? This is what would happen, only much worse.

    Take care!

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  • Do Probiotics Work For Weight Loss?

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    It’s Q&A Day at 10almonds!

    Have a question or a request? We love to hear from you!

    In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!

    As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!

    So, no question/request too big or small

    ❝Can you talk about using probiotics for weight loss? Thanks❞

    Great question! First, a quick catch-up:

    How Much Difference Do Probiotic Supplements Make, Really?

    Our above-linked article covers a number of important benefits of probiotic supplements, but we didn’t talk about weight loss at all. So let’s examine whether probiotics are useful for weight loss.

    Up-front summary: the science is unclear

    This 2021 systematic review found that they are indeed very effective:

    ❝The intake of probiotics or synbiotics could lead to significant weight reductions, either maintaining habitual lifestyle habits or in combination with energy restriction and/or increased physical activity for an average of 12 weeks.

    Specific strains belonging to the genus Lactobacillus and Bifidobacterium were the most used and those that showed the best results in reducing body weight.

    Both probiotics and synbiotics have the potential to help in weight loss in overweight and obese populations.❞

    Source: Effects of Probiotics and Synbiotics on Weight Loss in Subjects with Overweight or Obesity: A Systematic Review

    This slightly older (2015) systematic review and meta-analysis found the opposite:

    ❝Collectively, the RCTs examined in this meta-analysis indicated that probiotics have limited efficacy in terms of decreasing body weight and BMI and were not effective for weight loss.❞

    Source: Probiotics for weight loss: a systematic review and meta-analysis

    And in case that’s not balanced enough, this 2020 randomized controlled trial got mixed results:

    ❝Regression analysis performed to correlate abundance of species following supplementation with body composition parameters and biomarkers of obesity found an association between a decrease over time in blood glucose and an increase in Lactobacillus abundance, particularly in the synbiotic group.

    However, the decrease over time in body mass, BMI, waist circumstance, and body fat mass was associated with a decrease in Bifidobacterium abundance.❞

    Source: Effects of Synbiotic Supplement on Human Gut Microbiota, Body Composition and Weight Loss in Obesity

    Summary

    Probiotics may or may not work for weight loss.

    In all likelihood, it depends on the blend of cultures contained in the supplement. It’s possible that Lactobacillus is more beneficial for weight loss than Bifidobacterium, which latter may actually reduce weight loss.

    Or it might not, because that was just one study and correlation ≠ causation!

    We’d love to give you a hard-and-fast answer, but if the data doesn’t support a hard-and-fast answer, we’re not going to lie to you.

    What we can say for sure though is that probiotics come with very many health benefits, so whether or not weight loss is one of them, they’re a good thing to have for most people.

    Some further articles that may interest you:

    Take care!

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  • Top 10 Foods That Promote Lymphatic Drainage and Lymph Flow

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    Melissa Gallagher, a naturopath by profession, recommends the following 10 foods that she says promote lymphatic drainage and lymph flow, as well as the below-mentioned additional properties:

    Ginger

    Ginger is a natural anti-inflammatory, which we wrote about here:

    Ginger Does A Lot More Than You Think

    Turmeric

    Turmeric is another natural anti-inflammatory, which we wrote about here:

    Why Curcumin (Turmeric) Is Worth Its Weight In Gold

    Garlic

    Garlic is—you guessed it—another natural anti-inflammatory which we wrote about here:

    The Many Health Benefits Of Garlic

    Pineapple

    Pineapple contains a collection of enzymes collectively called bromelain—which is a unique kind of anti-inflammatory, and which we have written about here:

    Bromelain vs Inflammation & Much More

    Citrus

    Citrus fruits like oranges, lemons, and grapefruits are rich in vitamin C, which can help support the immune system in general.

    Cranberry

    Cranberries contain antioxidants and anti-inflammatory compounds, which we wrote about here:

    Health Benefits Of Cranberries (But: You’d Better Watch Out)

    The video also explains how cranberry bioactives inhibit adipogenesis and reduces fat congestion in your lymphatic system.

    Dandelion Tea

    Dandelion is a natural diuretic and anti-inflammatory herb, which we’ve not written about yet!

    Nettle Tea

    Nettle is a natural diuretic and anti-inflammatory herb, which we’ve also not written about yet!

    Healthy Fats

    Healthy fats like avocado, nuts, and olive oil can help reduce inflammation and support the immune system.

    Fermented Foods

    Fermented foods, such as kimchi and sauerkraut, contain probiotics that can improve gut health, which in turn boosts the immune system. You can read all about it here:

    Making Friends With Your Gut (You Can Thank Us Later)

    Want the full explanation? Here’s the video:

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    How was the video? If you’ve discovered any great videos yourself that you’d like to share with fellow 10almonds readers, then please do email them to us!

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  • No Equipment Muscle Gain Routine for Ages 50+

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Sarcopenia, the loss of muscle mass commonly associated with aging, can be a big problem as it leaves us vulnerable to injury (and also isn’t great for the metabolism—keeping adequate muscle mass ensures keeping the metabolism ticking over nicely). Will Harlow, over-50s specialist physiotherapist, is here to share a routine that works without weights:

    Where it counts

    There’s a fair amount of emphasis here on the lower body and core. That’s because in practical terms, this is what matters more for our health than having bulging biceps:

    • First exercise: donkey calf raises to build strength in the calves using a chair.
    • Second exercise: single-leg elevated lunge to work the quads and glutes, using a step or books for elevation.
    • Third exercise: slow sit-to-stand for quads, glutes, and core strength, focusing on a slow descent.
    • Fourth exercise: wall press-up to strengthen the chest, shoulders, and arms, with a variation using towels for increased resistance.
    • Final exercise: shoulder raises using bottles or similar weights to target the shoulders and rotator cuffs.

    Ok, so that last one was a slight cheat on his part as it does require grabbing a weight, but it’s not specialist equipment at least, and can just be something you grabbed at home. It’s also the least important of the five exercises, and can be skipped if necessary.

    For more on all of these plus visual demonstrations, enjoy:

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    Want to learn more?

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    Take care!

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  • Plum vs Nectarine – Which is Healthier?

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    Our Verdict

    When comparing plums to nectarines, we picked the nectarines.

    Why?

    Both are great! But nectarines win at least marginally in each category we look at.

    In terms of macros, plums have more carbs while nectarines have more fiber, resulting of course in a lower glycemic index. Plums do have a low GI also; just, nectarines have it better.

    When it comes to vitamins, plums have more of vitamins A, B6, C, and K, while nectarines have more of vitamins B1, B2, B3, B5, E, and choline.

    In the category of minerals, plums are great but not higher in any mineral than nectarines; nectarines meanwhile have more copper, iron, magnesium, manganese, phosphorus, potassium, and zinc.

    All in all, enjoy both. And if having dried fruit, then prunes (dried plums) are generally more widely available than dried nectarines. But if you’re choosing one fruit or the other, nectarine is the way to go.

    Want to learn more?

    You might like to read:

    Take care!

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