revly Vegetarian Women's Probiotic 50 Billion CFU Review

Revly Vegetarian Women's Probiotic 50 Billion CFU is a once-daily dietary supplement for vaginal and urinary tract health. It was sold under Amazon's Revly label and has since been rebranded Amazon Basics. Retail listings describe a vegetarian capsule with a seven-strain blend of Lactobacillus and Bifidobacteria. The Walmart listing states that each capsule has 50 billion CFU (colony-forming units) at the end of shelf life. That total is split into 25 billion CFU of a Lactococcus/Lactobacillus blend and 25 billion CFU of a Bifidobacterium blend. The directions are one capsule daily with food, stored cool and dry away from direct sunlight. Listings sell it in 30-count and 60-count sizes. How it works: the mechanisms below are the general ones established for these genera, not claims specific to this brand's own research. A healthy vaginal microbiome is dominated by Lactobacillus species. They ferment glycogen into lactic acid, which keeps vaginal pH around 3.5 to 4.5. That acidity discourages the overgrowth of opportunistic organisms such as Gardnerella, Candida and uropathogenic E. coli. Some Lactobacillus strains also produce hydrogen peroxide and bacteriocins, which are antimicrobial compounds. They compete with pathogens for epithelial adhesion sites and nutrients, forming a protective biofilm-like layer on mucosal surfaces. Orally ingested strains must survive stomach acid and bile. They then colonize the gut, and the gut is the main reservoir for organisms that can reach the urogenital tract. Bifidobacteria support the intestinal barrier and produce short-chain fatty acids such as acetate. They also help modulate local immune signaling. The aim is to shift the gut flora so that fewer uropathogens migrate to the urethra and vagina. The high CFU count is meant to give strains a better chance of surviving transit and establishing themselves. A higher count does not guarantee better results, because the specific strain matters more than the total number. The vegetarian capsule shell means no gelatin. An eBay listing also flags the product as alcohol-free. Probiotics are dietary supplements, so they are not intended to diagnose, treat or cure any disease. Anyone with recurrent infections, pregnancy, or a compromised immune system should check with a clinician first.

Tier ⓘ
Tier 4 · Rank 13
Tier 4 · Emerging. A promising mechanism or animal data, with thin human evidence so far. Rank 13 within Tier 4 for Digestion and Bloating; 41 of 44 overall. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
29 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
– no stars shown, 27 reviews
Biohacker Mentions
7 of 10

Study, Trial or Testing Result Summary

Members Only107 human studies · 63 improved
107 human studies63 improved22 no effect38,725 people studied

This probiotic hides its two bacteria blends, so the amount of each strain is unknown. Its prebiotic is only 50 milligrams, far below studied doses. Lactic acid bacteria blends mostly helped in trials. A two-strain blend gave more overall relief than placebo in adults with irritable bowel syndrome without constipation, with less pain and swelling [1]. A multi-strain blend eased symptoms in people with celiac disease [2]. A blend improved stool consistency in constipation [3]. Other trials found no benefit for bloating [4] or overall symptoms [5], and one found less gas but not less pain [6]. Bifidobacterium also mostly helped. Reviews found mixes with Lactobacillus raised the number of people who responded [7] and improved symptoms [8]. One large review found possible pain relief but no bloating benefit, with low certainty [9]. Single-strain trials eased pain, bloating and gas [10], improved diarrhea-type symptoms [11] and normalized stools [12]. Prebiotics helped bloating and gas at gram doses [13], but reviews found no clear benefit for irritable bowel syndrome [14]. Because the strains and amounts are hidden and the prebiotic is a trace amount, these results may not apply to this product. Animal and cell studies are never counted.

See all 107 studies →Hide the studies

Review Totals and Summary

Members Only27 reviews
27 reviews · Google 27

Written feedback for this exact product is sparse in publicly searchable sources, so I can't honestly report a broad set of themes. The only text I found was a single eBay review from 2020. That reviewer called it a great product at a good price, and the eBay page tagged it with "good value" and "good quality." The Walmart page lists about 22 seller reviews but showed no readable comments. Amazon showed no review text for it, only sales signals such as "800+ bought" on the brand page. So the only theme I can source is value for money. The product is a store-brand probiotic with a high CFU count at a modest price. The Walmart listing showed $39.86 for the 30-count, but that was a third-party price and may not be typical. I did not find sourced complaints about pill size, taste, digestive upset or lack of results, and I won't make any up. In the wider women's-probiotic category, buyers often mention three things. They notice gas or bloating in the first week or two. They disagree about whether a supplement noticeably changed urinary or vaginal comfort, since effects are subjective and slow. They also ask whether the capsules need refrigeration. That is category-level context, not feedback on this product. For real customer sentiment, the best next step is to read the verified-purchase reviews on the current Amazon Basics One Daily Women's Probiotic page. They are probably pooled under that name now. I couldn't retrieve them.

Biohacker Summary

Members Only7 of 10 recommend it
7 of 10 biohackers on our panel recommend it

Bifidobacterium, the main ingredient, drew mostly neutral comments from the panel, and only one of them recommended it, saying it is a good bacteria to include in probiotics. Six of the ten panelists spoke about it, mainly describing what it may do. They linked it to the gut messenger GABA, which one said acts as a mild sedative and can reduce irritability, and to brain chemistry and anxiety-like behavior. They also linked it to digestive complaints such as gas, bloating, diarrhea and constipation, and to less belly fat and better blood pressure in one study of menopausal women. Nobody gave a dose or a preferred form, and nobody named a pairing for it. Cautions were limited: one panelist said it helps make dopamine, which can be a problem in kids with ADHD, and another warned that too much of certain probiotics can cause brain fog. Lactobacillus is a smaller ingredient in this product, and two of the panel recommended it, mainly for digestion and for lowering microplastics in the blood.

See all 8 biohackers →Hide the biohackers
  • Dr. Mark Hyman · Bifidobacterium · neutral
    • 31 Aug 2026 · neutral · YouTube ↗
      Notes that Bifidobacterium is important in regulating dopamine, which can be problematic in kids with ADHD.
    • 13 Sep 2024 · recommends · YouTube ↗
      Recommends bifidobacterium as a good bacteria to include in probiotics.
    • 13 Sep 2024 · Lactobacillus · recommends · YouTube ↗
      Recommends lactobacillus as a good bacteria to include in probiotics.
    • 8 Apr 2024 · neutral · YouTube ↗
      Mentions that many bacteria, including bifidobacterium, can help produce GABA in the gut, which is a relaxation neurotransmitter.
    • 17 Jan 2024 · neutral · YouTube ↗
      Mentions bifidobacterium as one of the three classes of probiotics, along with lactobacillus and streptococcus, that have been predominantly used in food products in Japan, Europe, and North America.
    • 17 Jan 2024 · Lactobacillus · neutral · YouTube ↗
      Notes that lactobacillus was broken into about 200 subclasses and renamed two years ago, so the term is not really used anymore.
    • 27 Sep 2023 · Lactobacillus · warns · YouTube ↗
      Notes that people who age very badly have a lot of lactobacillus in their small bowel, and their aging paper found lactobacillus in the small bowel to be a sign of unhealthy older people.
    • 22 Oct 2021 · recommends · YouTube ↗
      Cites a study where Bifidobacterium plantarum lactase combined with xyloglucan (a non-digestible fiber) significantly improved healing and resolved symptoms in ulcerative colitis patients.
    • 22 Oct 2021 · Lactobacillus · recommends · YouTube ↗
      Notes that Lactobacillus species are often missing or in low concentration in patients with inflammatory bowel disease, and replacing them yields huge benefits.
    • 27 Sep 2021 · neutral · YouTube ↗
      Notes that people with OCD tend to be low in some Bifidobacterium species.
    • 6 Sep 2021 · Lactobacillus · recommends · YouTube ↗
      References a study showing that giving pregnant women lactobacillus during pregnancy and babies after birth led to far less eczema, asthma, and allergies.
    • 16 Aug 2021 · neutral · YouTube ↗
      Notes that VSL#3 contains strains of Bifidobacterium that are low in patients and helpful in healing the gut lining and mucosa.
    • 16 Aug 2021 · Lactobacillus · neutral · YouTube ↗
      Notes that VSL#3 contains strains of Lactobacillus that are low in patients and helpful in healing the gut lining and mucosa.
    • 13 Dec 2020 · uses · YouTube ↗
      Uses Bifidobacterium at 450 million twice a day, which they included in a published protocol for ozone, because the bacteria itself directly interacts negatively with and kills the virus.
  • Ben Greenfield · Bifidobacterium · neutral
    • 16 Aug 2025 · neutral · YouTube ↗
      Notes that during a wild food diet, bacteria associated with dairy-heavy diets, like Bifidobacterium, dropped significantly.
    • 23 Jun 2026 · Prebiotic Blend · neutral · Facebook ↗
      Notes that IM8health includes a full prebiotic blend for the gut.
    • 13 Jun 2024 · neutral · YouTube ↗
      Ben Greenfield's guest notes that Ben Greenfield's Bifidobacterium levels are low, which is common in most people who take the test.
    • 4 Jul 2019 · neutral · YouTube ↗
      Mentions that probiotic formulations including Bifidobacterium have shown a direct neurochemical effect on the central nervous system that affected anxiety-like behaviors.
    • 4 Jul 2019 · Lactobacillus · neutral · YouTube ↗
      Mentions that probiotic formulations including lactobacillus have shown a direct neurochemical effect on the central nervous system that affected anxiety-like behaviors.
    • 20 Jun 2019 · Lactobacillus · recommends · YouTube ↗
      Highlights that a specific Lactobacillus species may help counter the effects of bacteria known to produce a lot of gas, especially methane, and recommends choosing a probiotic with this species if gas issues are present.
    • 19 Jun 2019 · Lactobacillus · recommends · YouTube ↗
      Highlights that a specific lactobacillus species may help counter the effects of gas-producing bacteria, especially methane, for digestive health.
    • 30 Dec 2017 · recommends · YouTube ↗
      Recommends taking Bifidobacterium, a histamine-lowering probiotic, prior to or immediately after consuming wine to help degrade histamine and improve sleep.
    • 30 Nov 2017 · Lactobacillus · neutral · YouTube ↗
      Is working with UCLA on a form of lactobacillus called lactobacillus four-five-six, which can colonize the gut from the small intestine through the colon and is showing in second phase trials to stay fully present through the feces.
  • Peter Attia · Bifidobacterium · neutral
    • 18 Dec 2023 · neutral · YouTube ↗
      States that bifidobacterium, found in yogurts and probiotics, is most well-documented for its impact on GI symptoms such as gas, bloating, diarrhea, and constipation.
    • 18 Dec 2023 · Lactobacillus · neutral · YouTube ↗
      States that lactobacillus, found in yogurts and probiotics, is most well-documented for its impact on GI symptoms such as gas, bloating, diarrhea, and constipation.
  • Andrew Huberman · Bifidobacterium · neutral
    • 28 Feb 2022 · neutral · YouTube ↗
      States that bifidobacterium can give rise to increases in GABA levels, an inhibitory neurotransmitter that acts as a mild sedative and can reduce irritability.
    • 23 Jan 2025 · Lactobacillus · warns · YouTube ↗
      Warns that taking excessive amounts of certain probiotics, like lactobacillus, can lead to brain fog and an inability to focus.
    • 3 Jun 2024 · Lactobacillus · neutral · YouTube ↗
      Mentions a study where women who were obese and hypertensive in menopause, and had visceral fat, saw a decrease in visceral fat and improvements in blood pressure when supplementing with lactobacillus and bifidobacterium.
    • 28 Feb 2022 · Lactobacillus · neutral · YouTube ↗
      States that lactobacillus can give rise to increases in GABA levels, an inhibitory neurotransmitter that acts as a mild sedative and can reduce irritability.
    • Date not recorded · neutral · Website ↗
      Mentions a study where Lactobacillus and Bifidobacterium supplementation in obese, hypertensive menopausal women led to decreased visceral fat and improved blood pressure.
    • Date not recorded · Lactobacillus · neutral · Website ↗
      Mentions a study where Lactobacillus and Bifidobacterium supplementation in obese, hypertensive menopausal women led to decreased visceral fat and improved blood pressure.
  • Thomas DeLauer · Bifidobacterium · neutral
    • 16 Jun 2021 · neutral · YouTube ↗
      Discusses Bifidobacterium, noting that more of this bacteria seems to be correlated with less visceral fat and that a specific strain was shown to significantly reduce visceral fat in a study.
    • 31 May 2021 · Lactobacillus · neutral · YouTube ↗
      Mentions a study showing that intermittent fasting usually leads to an increase in lactobacillus, a widely studied species that puts one in a good spot when improved.
    • 15 Dec 2020 · Lactobacillus · neutral · YouTube ↗
      Discusses how lactobacillus is linked to a decrease in lipopolysaccharide leakage, which can improve insulin sensitivity and affect the brain's perception of hunger and satiety, and can also increase glucagon-like peptide 1.
    • 26 Jul 2019 · Lactobacillus · neutral · YouTube ↗
      States that lactobacillus, a type of probiotic, shows signs of reducing lipopolysaccharides, which are inflammatory compounds from gram-negative bacteria.
    • 10 Aug 2018 · Lactobacillus · neutral · YouTube ↗
      Notes that introducing the right forms of lactobacillus bacteria made it possible for the brain to combine logic and emotion in the best possible ways, by increasing communication between the emotional part of the brain and the prefrontal cortex.
  • Dr. Eric Berg · Bifidobacterium · neutral
    • 11 Jun 2019 · neutral · YouTube ↗
      States that a lack of Bifidobacterium in the digestive system can lead to problems with brain chemistry.
    • 13 Nov 2021 · Lactobacillus · recommends · YouTube ↗
      Recommends taking Lactobacillus for constipation, and also notes it is good for diarrhea.
    • 26 Feb 2021 · Lactobacillus · neutral · YouTube ↗
      Explains that lactobacillus is a common microbe that lives in and around the body, part of the microbiome, and can help in many ways, including with IBS, colic, intestinal inflammation, gastritis, stomach pain, hay fever, allergies, candida, liver disease, gallbladder problems, constipation, diarrhea, arthritis, C diff, vaginal yeast infections, and UTIs.
    • 27 Jun 2020 · Lactobacillus · recommends · YouTube ↗
      Recommends consuming foods containing the lactobacillus Bifidobacterium microbe, as it can create serious benefits for someone who is depressed by helping to make neurotransmitters like GABA and serotonin.
    • 28 Apr 2020 · Lactobacillus · recommends · Podcast ↗
      Lists lactobacillus as a new remedy for rheumatoid arthritis.
    • 16 Jul 2019 · Lactobacillus · recommends · YouTube ↗
      Recommends lactobacillus as a microbe that can reduce oxalates by 40 to 60%.
    • 11 Jun 2019 · Lactobacillus · neutral · YouTube ↗
      States that a lack of lactobacillus in the digestive system can lead to problems with brain chemistry.
    • 31 Aug 2016 · Lactobacillus · neutral · YouTube ↗
      Explains that friendly bacteria like lactobacillus in the large bowel produce lactic acid, which is important for acidifying the colon.
    • Date not recorded · Lactobacillus · neutral · Website ↗
      Imbalances in gut microbiota can diminish beneficial bacteria such as Lactobacillus, which plays a crucial role in maintaining a healthy balance of microorganisms within the gut and preventing candida overgrowth.
  • Dave Asprey · Lactobacillus · recommends
    • 5 Mar 2026 · recommends · Podcast ↗
      Dave Asprey recommends lactobacillus, noting that studies show it reduced microplastics in the blood by 82 percent.
    • 5 Mar 2026 · recommends · YouTube ↗
      Notes that lactobacillus, found in yogurt and L. reuteri in kimchi, has been shown to decrease microplastics in blood by 82%, likely by helping to break them down and aiding the body in their removal.
    • 17 Nov 2022 · neutral · YouTube ↗
      Notes that some women with high levels of lactobacillus can be exposed to HSV, HPV, and HIV without becoming infected, but still doesn't recommend it as a weapon against STDs.
  • Dr. Rhonda Patrick · Lactobacillus · neutral
    • 8 Jun 2021 · neutral · YouTube ↗
      Explains that Lactobacillus and Bifidobacter are beneficial microbes, and fibers generally increase both, which are thought to make short-chain fatty acids that boost the immune system.

RAL Summary

Members OnlyTier 4 for Digestion and Bloating

Probiotic blends of Lactobacillus and Bifidobacterium often help sensitive bowels in trials [7], but this product hides its strain amounts in blends and has only a trace of prebiotic, and there are no counted reviews, so the evidence for this product is thin.

  • Emerging: not enough evidence to rank higher yet.
  • Proprietary Lactobacillus/Lactococcus Blend: amount hidden in a blend
  • Bifidobacterium: amount hidden in a blend

Where the evidence disagrees: 22 of the 107 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Digestive system

Combine with: For cellular and DNA repair support, pair this probiotic with ingredients that act more directly on aging pathways. Examples are NMN or nicotinamide riboside for NAD+ support, trans-resveratrol or pterostilbene for sirtuin activation, and CoQ10 or PQQ for mitochondrial function. Alpha-lipoic acid, astaxanthin, and vitamin C and E offer antioxidant protection against oxidative DNA damage. Methylated B vitamins (folate, B12) support DNA methylation and repair. Magnesium and zinc are cofactors for DNA repair enzymes. A prebiotic fiber such as inulin or partially hydrolyzed guar gum can help the probiotic strains thrive, and omega-3 fish oil supports healthy inflammatory balance. Check with a healthcare provider before starting new supplements, especially if you take medications or are pregnant.

Possible side effects: Studies reported no serious side effects; fiber and inulin-type prebiotics raised gas in some trials.

Supplement Facts

Proprietary Lactobacillus/Lactococcus Blend 0 · Proprietary Bifidobacterium Blend 0 · Prebiotic Blend 50 mg
Supplement Facts
Serving Size 1 Vegetarian Capsule(s)
Servings Per Container 30
Amount Per Serving% Daily Value
Proprietary Lactobacillus/Lactococcus Blend0†
Proprietary Bifidobacterium Blend0†
Prebiotic Blend50 mg†
† Daily Value not established.

Other ingredients: Modified Cellulose, Water, Cellulose, Magnesium Stearate, Silica, Calcium Silicate.

Directions: Suggested use: Adults take 1 capsule with food daily, or as directed by a healthcare professional.

Label source: NIH label database · Report a label change

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Graded November 6, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.