Vaginal Probiotics: What Does The Science Say?

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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 😎

❝Is there any merit to vaginal probiotics?❞

What a fun question! First let’s break it down, as this could mean two different things:

  1. Probiotics, which you consume, using your mouth, which are marketed as benefiting vaginal health
  2. Probiotics taken as a vaginal pessary/suppository, to act directly there

The former has limited evidence for it, but generally speaking, improving one’s gut health improves all other areas of health, so it’s not surprising if it helps this too.

See for example:

Ingestion of yogurt containing Lactobacillus acidophilus compared with pasteurized yogurt as prophylaxis for recurrent candidal vaginitis and bacterial vaginosis

Some notes:

  • candidal vaginitis means a yeast infection causing vaginal inflammation
  • bacterial vaginosis means a vaginal bacterial imbalance (generally also featuring vaginal inflammation, though it can be asymptomatic)

In the latter case, the “imbalance” in question is usually a shortage of Lactobacillus sp. (that is to say, the diverse species of the Lactobacillus genus) resulting in an overgrowth of other kinds of bacteria, which in turn results in changing the vaginal microbiome to make it warmer and more acidic than it should be.

While a healthy vagina shouldn’t smell of roses, it shouldn’t smell fishy either; if it does, that’s a sign of bacterial vaginosis.

What it’s supposed to be like: slightly bitter, slightly salty, distinctly umami, along with a cocktail of personal pheromones (and if menstruating or otherwise* vaginally bleeding, then of course add: iron/”metallic”). The pheromones will also reflect any hormonal changes, but should never make anything smell bad, just different.

*e.g. due to PCOS, fibroids, etc. Note that in the case of PCOS, it may also smell a little different (if it does, then usually: a little more musky), due to often different hormone levels. Again: it still shouldn’t smell bad, though, just different.

In the above-linked study, taking more live Lactobacillus acidophilus (in yogurt, eating it, with their mouths) improved levels of L. acidophilus in the vagina. While the study authors concluded “this ingestion of yogurt may have reduced episodes of bacterial vaginosis”, which is rather a weak claim, it can be argued that it merely improving the levels of L. acidophilus in the vagina was already a win.

That was a small (n=42, and only 7 followed through to completion) and old (1996) study, and it bears mentioning that most of the studies into this seem to be small and old, but conclude similarly with weakly positive statements.

However, it does make a difference what kind of Lactobacillus is used, for example in this next study…

  • L. fermentum RC-14 worked well (90% success rate)
  • L. rhamnosus GR-1 worked somewhat (40% success rate)
  • L. rhamnosus GG did not work (0% success rate)

So, diversity is key, and getting a wide range of Lactobacillus sp. seems to be a safe bet.

Short version: enjoying probiotics as part of your diet probably improves vaginal health, just like it improves pretty much everything else.

See also: Make Friends With Your Gut (You Can Thank Us Later)

You would think that this would mean that taking probiotics as a vaginal pessary/suppository would be even better, but the results are weaker, as in this study, which produced temporary improvements in about half the study group, with only 3 out of 28 being free of bacterial vaginosis the next month:

Treatment of bacterial vaginosis with lactobacilli

This study got better results, with a 61% success rate:

Effectiveness of Lactobacillus-containing vaginal tablets in the treatment of symptomatic bacterial vaginosis

Important note

Do note that this last category, involving topical treatments (i.e., manually introducing Lactobacillus sp. to the vagina) were all in cases of pre-existing bacterial vaginosis, not as a prophylactic and/or general health-improving thing.

If your vagina seems happy right now, then do not mess with its happy bacterial balance!

And at all times (regardless of whether it seems happy right now or not): do not douche (it does not need it and will not benefit from it; the vagina is self-cleaning*) as this will wash out many of your Lactobacilli and will do absolutely nothing against any Candida there (C. albicans being a rooted fungus, whereas Lactobacillus is a sausage-shaped bacterium with many tiny appendages but no actual ability to stay put), so Candida will flourish in the Lactobacillus’s absence.

*by the vagina, we are referring to the vaginal canal. The vulva—the outside part consisting of the two pairs of labia, the glans clitoris, and clitoral hood—are not self-cleaning, and should just be washed gently per your normal bath/shower routine; that’s perfectly fine and good.

And definitely don’t put any “cleansing” toiletries inside the vagina (or any toiletries at all, for that matter), even if they are sold and marketed for that purpose; they will not help and they will harm.

Also, due to their neighborliness, messing up the microbiome inside the vagina is a common way to also get Candida inside the urethra:

How To Avoid Urinary Tract Infections (UTIs)

One other option

Finally, unless you have a “very good friend” you have a pressing urge to swap germs with, you might want to leave this one to the scientists, but we share this paper just for interest:

The effectiveness of vaginal microbiota transplantation for vaginal dysbiosis and bacterial vaginosis: a scoping review

Lastly…

Going back to oral supplementation, if you’d like to try that then check out this for further notes on what, why, how, etc:

How Much Difference Do Probiotic Supplements Make To Health?

Take care!

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  • Nudge – by Richard Thaler & Cass Sunstein

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    How often in life do we make a suboptimal decision that ends up plaguing us for a long time afterwards? Sometimes, a single good or bad decision can even directly change the rest of our life.

    So, it really is important that we try to optimize the decisions we do make.

    Professors Richard Thaler and Cass Sunstein look at all kinds of decision-making in this book. Their goal, as per the subtitle, is “improving decisions about health, wealth, and happiness”.

    For the most part, the book concentrates on “nudges”. Small factors that influence our decisions one way or another.

    Most importantly: that some of them are very good reasons to be nudged; others, very bad ones. And they often look similar.

    Where this book excels is in highlighting the many ways we make decisions without even thinking about it… or we think about it, but only down a prescribed, foreseen track, to an externally expected conclusion (for example, an insurance company offering three packages, but two of them exist only to direct you to the “correct” choice).

    A weakness of the book is that in some aspects it’s a little inconsistent. The authors describe their economic philosophy as “libertarian paternalism”, and as libertarians they’re against mandates, except when as paternalists they’re for them. But, if we take away their labels, this boils down to “some mandates can be good and some can be bad”, which would not be so inconsistent after all.

    Bottom line: if you’d like to better understand your own decision-making processes through the eyes of policy-setting economists (especially Sunstein, who worked for the White House Office of Information & Regulatory Affairs) whose job it is to make sure you make the “right” decisions, then this is a very enlightening book.

    Click here to check out Nudge and improve your decision-making clarity!

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  • The Diet Compass – by Bas Kast

    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.

    Facts about nutrition and health can be hard to memorize. There’s just so much! And often there are so many studies, and while the science is not usually contradictory, pop-science headlines sure can be. What to believe?

    Bas Kast brings us a very comprehensive and easily digestible solution.

    A science journalist himself, he has gone through the studies so that you don’t have to, and—citing them along the way—draws out the salient points and conclusions.

    But, he’s not just handing out directions (though he does that too); he’s arranged and formatted the information in a very readable and logical fashion. Chapter by chapter, we learn the foundations of important principles for “this is better than that” choices in diet.

    Most importantly, he lays out for us his “12 simple rules for healthy eating“, and they are indeed as simple as they are well-grounded in good science.

    Bottom line: if you want “one easy-reading book” to just tell you how to make decisions about your diet, simply follow those rules and enjoy the benefits… Then this book is exactly that.

    Click here to check out The Diet Compass and get your diet on the right track!

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  • A Statin-Free Life – by Dr. Aseem Malhotra

    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.

    Here at 10almonds, we’ve written before about the complexities of statins, and their different levels of risk/benefit for men and women, respectively. It’s a fascinating topic, and merits more than an article of the size we write here!

    So, in the spirit of giving pointers of where to find a lot more information, this book is a fine choice.

    Dr. Malhotra, a consultant cardiologist and professor of evidence-based medicine, talks genes and lifestyle, drugs and blood. He takes us on a tour of the very many risk factors for heart disease, and how cholesterol levels may be at best an indicator, but less likely a cause, of heart disease, especially for women. Further and even better, he discusses various more reliable indicators and potential causes, too.

    Rather than be all doom and gloom, he does offer guidance on how to reduce each of one’s personal risk factors and—which is important—keep on top of the various relevant measures of heart health (including some less commonly tested ones, like the coronary calcium score).

    The style is light reading andyet with a lot of reference to hard science, so it’s really the best of both worlds in that regard.

    Bottom line: if you’re considering statins, or are on statins and are reconsidering that choice, then this book will (notwithstanding its own bias in its conclusion) help you make a more-informed decision.

    Click here to check out A Statin-Free Life, and make the best choice for you!

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Related Posts

  • Marathons in Mid- and Later-Life
  • The 5 Love Languages Gone Wrong

    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.

    Levelling up the 5 love languages

    The saying “happy wife; happy life” certainly goes regardless of gender, and if we’re partnered, it’s difficult to thrive in our individual lives if we’re not thriving as a couple. So, with the usual note that mental health is also just health, let’s take a look at getting beyond the basics of a well-known, often clumsily-applied model:

    The 5 love languages

    You’re probably familiar with “the 5 love languages”, as developed by Dr. Gary Chapman. If not, they are:

    1. Acts of Service
    2. Gift-Giving
    3. Physical Touch
    4. Quality Time
    5. Words of Affirmation

    The idea is that we each weight these differently, and problems can arise when a couple are “speaking a different language”.

    So, is this a basic compatibility test?

    It doesn’t have to be!

    We can, if we’re aware of each other’s primary love languages, make an effort to do a thing we wouldn’t necessarily do automatically, to ensure they’re loved the way they need to be.

    But…

    What a lot of people overlook is that we can also have different primary love languages for giving and for receiving. And, missing that can mean that even taking each other’s primarily love languages into account, efforts to make a partner feel loved, or to feel loved oneself, can miss 50% of the time.

    For example, I (your writer here today, hi) could be asked my primary love language and respond without hesitation “Acts of Service!” because that’s my go-to for expressing love.

    I’m the person who’ll run around bringing drinks, do all the housework, and without being indelicate, will tend towards giving in the bedroom. But…

    A partner trying to act on that information to make me feel loved by giving Acts of Service would be doomed to catastrophic failure, because my knee-jerk reaction would be “No, here, let me do that for you!”

    So it’s important for partners to ask each other…

    • Not: “what’s your primary love language?” ❌
    • But: “what’s your primary way of expressing love?” ✅
    • And: “which love language makes you feel most loved?” ✅

    For what it’s worth, I thrive on Words of Affirmation, so thanks again to everyone who leaves kind feedback on our articles! It lets me know I provided a good Act of Service

    So far, so simple, right? You and your partner (or: other person! Because as we’ve just seen, these go for all kinds of dynamics, not just romantic partnerships) need to be aware of each other’s preferred love languages for giving and receiving.

    But…

    There’s another pitfall that many fall into, and that’s assuming that the other person has the same idea about what a given love language means, when there’s more to clarify.

    For example:

    • Acts of Service: is it more important that the service be useful, or that it took effort?
    • Gift-Giving: is it better that a gift be more expensive, or more thoughtful and personal?
    • Physical Touch: what counts here? If we’re shoulder-to-shoulder on the couch, is that physical touch or is something more active needed?
    • Quality Time: does it count if we’re both doing our own thing but together in the same room, comfortable in silence together? Or does it need to be a more active and involved activity together? And is it quality time if we’re at a social event together, or does it need to be just us?
    • Words of Affirmation: what, exactly, do we need to hear? For romantic partners, “I love you” can often be important, but is there something else we need to hear? Perhaps a “because…”, or perhaps a “so much that…”, or perhaps something else entirely? Does it no longer count if we have to put the words in our partner’s mouth, or is that just good two-way communication?

    Bottom line:

    There’s a lot more to this than a “What’s your love language?” click-through quiz, but with a little application and good communication, this model can really resolve a lot of would-be problems that can grow from feeling unappreciated or such. And, the same principles go just the same for friends and others as they do for romantic partners.

    In short, it’s one of the keys to good interpersonal relationships in general—something critical for our overall well-being!

    Don’t Forget…

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  • How To Recover Quickly From A Stomach Bug

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    How To Recover Quickly From A Stomach Bug

    Is it norovirus, or did you just eat something questionable? We’re not doctors, let alone your doctors, and certainly will not try to diagnose from afar. And as ever, if unsure and/or symptoms don’t go away or do get worse, seek professional medical advice.

    That out of the way, we can give some very good general-purpose tips for this one…

    Help your immune system to help you

    So far as you can, you want a happy healthy immune system. For the most part, we’d recommend the following things:

    Beyond Supplements: The Real Immune-Boosters!

    …but you probably don’t want to be exercising with a stomach bug, so perhaps sit that one out. Exercise is the preventative; what you need right now is rest.

    Hydrate—but watch out

    Hydration is critical for recovery especially if you have diarrhea, but drinking too much water too quickly will just make things worse. Great options for getting good hydration more slowly are:

    • Peppermint tea
      • (peppermint also has digestion-settling properties)
    • Ginger tea
    • Broths
      • These will also help replenish your sodium and other nutrients, gently. Chicken soup for your stomach, and all that. A great plant-based option is sweetcorn soup.
      • By broths, we mean clear(ish) water-based soups. This is definitely not the time for creamier soups.

    ❝Milk and dairy products should be avoided for 24 to 48 hours as they can make diarrhea worse.

    Initial dietary choices when refeeding should begin with soups and broth.❞

    Source: American College of Gastroenterology

    Other things to avoid

    Caffeine stimulates the digestion in a way that can make things worse.

    Fat is more difficult to digest, and should also be avoided until feeling better.

    To medicate or not to medicate?

    Loperamide (also known by the brand name Imodium) is generally safe when used as directed.

    Click here to see its uses, dosage, side effects, and contraindications

    Antibiotics may be necessary for certain microbial infections, but should not be anyone’s first-choice treatment unless advised otherwise by your doctor/pharmacist.

    Note that if your stomach bug is not something that requires antibiotics, then taking antibiotics can actually make it worse as the antibiotics wipe out your gut bacteria that were busy helping fight whatever’s going wrong in there:

    A gentler helper

    If you want to give your “good bacteria” a hand while giving pathogens a harder time of it, then a much safer home remedy is a little (seriously, do not over do it; we are talking 1–2 tablespoons, or around 20ml) apple cider vinegar, taken diluted in a glass of water.

    ❝Several studies indicate apple cider vinegar (ACV)’s usefulness in lowering postprandial glycemic response, specifically by slowing of gastric motility❞

    (Slowing gastric motility is usually exactly what you want in the case of a stomach bug, and apple cider vinegar)

    Source: Effectiveness of Nutritional Ingredients on Upper Gastrointestinal Conditions and Symptoms: A Narrative Review

    See also:

    Take care!

    Don’t Forget…

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  • Jackfruit vs Durian – Which is Healthier?

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    Our Verdict

    When comparing jackfruit to durian, we picked the durian.

    Why?

    Durian may look and smell like it has come directly from Hell, but there’s a lot of goodness in there!

    First, let’s talk macros: jackfruit and durian are both unusually high in protein, for fruits. That said, jackfruit does have slightly more protein—but durian has more than 2x the fiber, for only slightly more carbs, so we call this section a win for durian.

    Like most fruits, these two are an abundance source of vitamins; jackfruit has more of vitamins A and E, while durian has more of vitamins B1, B2, B3, B9, and C. Another win for durian.

    When it comes to minerals, jackfruit has more calcium, while durian has more copper, iron, manganese, phosphorus, and zinc. We don’t usually measure this one as there’s not much in most foods (unless added in artificially), but durian is also high in sulfur, specifically in “volatile sulfur compounds”, which account for some of its smell, and are—notwithstanding the alarming name—harmless. In any case, mineral content is another win for durian.

    These three things add up to one big win for durian.

    There is one thing to watch out for, though: durian inhibits aldehyde dehydrogenase, which the body uses to metabolize alcohol. So, we recommend you don’t drink-and-durian, as it can increase the risk of alcohol poisoning, and even if alcohol consumption is moderate, it’ll simply stay in your system for longer, doing more damage while it’s there. Of course, it is best to simply avoid drinking alcohol regardless, durian or no durian, but the above is good to know for those who do imbibe.

    A final word on durians: if you haven’t had it before, or had it and it was terrible, then know: much like a banana or an avocado, durian has a rather brief “ideal ripeness” phase for eating. It should be of moderate firmness; neither tough nor squishy. It should not have discolored spikes, nor should it have little holes in, nor be leaking fluid, and it should not smell of sweat and vinegar, although it should smell like sulfurous eggs, onions, and cheese. Basically, if it smells like a cheese-and-onion omelette made in Hell, it’s probably good. If it smells like something that died and then was kept warm in someone’s armpit for a day, it’s probably not. The best way to have a good first experience with a durian is to enjoy one with someone who knows and enjoys durians, as they will be able to pick one that’s right, and will know if it’s not (durian-sellers may not necessarily have your best interests at heart, and may seek to palm off over-ripe durians on people who don’t know better).

    Enjoy!

    Want to learn more?

    You might like to read:

    What’s Your Plant Diversity Score?

    Take care!

    Don’t Forget…

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