The 7 Best Probiotics for Better Gut Health, According to a Dietitian

Your gut is also central to your immune health, full stop. This supplement takes a multi-pronged approach, combining prebiotics, probiotics, and postbiotics in one formula—each working to support the gut microbiome, strengthen the gut barrier, and help regulate immune function.

At the core are two of the most well-researched strains: Lactobacillus rhamnosus LGG and Bifidobacterium lactis BB-12. These aren’t trendy add-ons—they’re backed by research for digestive and immune support, including helping the body respond to illness and potentially reducing the duration or severity of things like diarrhea and upper respiratory infections.

You’ll also get a prebiotic blend to help beneficial bacteria thrive, along with tributyrin—a postbiotic that converts into butyrate in the body. Butyrate supports the gut lining, helps regulate inflammation, and helps the immune system function properly.

It’s also refreshingly simple to stay consistent with. It’s just one minty capsule daily, can be taken with or without food, and doesn’t require refrigeration. Pair it with something you already do—morning coffee, dinner, brushing your teeth—and it quickly becomes part of your routine (the minty capsule actually makes that last one feel like a bonus).

If you’re thinking beyond day-to-day digestion and looking at the bigger metabolic picture—blood sugar, insulin sensitivity, long-term health—this probiotic centers on a single strain (yep, just one): Akkermansia muciniphila, a “next-generation” probiotic.

This strain works at the level of the gut lining, where it helps support barrier integrity—which is tightly linked to inflammation, insulin sensitivity, and metabolic health. Early research suggests it may help control blood sugar, improve insulin sensitivity, and influence satiety hormones like GLP-1 and PYY. We also see lower levels of Akkermansia in conditions like obesity and type 2 diabetes.

That said, this is still an emerging area of research—especially in humans—so it’s not a blanket recommendation. Because of how this strain interacts with the gut lining, it may not be the best fit for more complex gut or inflammatory conditions. This is one of those situations where personalization matters more than simply adding another supplement to your routine.

From a practical standpoint, refrigeration is recommended to help maintain potency, but it doesn’t have to live in your fridge 24/7—so it’s still manageable for travel, as long as you refrigerate it once you arrive. The brand also notes third-party testing, though it doesn’t specify certification by more widely recognized organizations such as NSF.

Digestive issues are one of the most common concerns I hear about, but they don’t always show up the same way—sometimes it’s bloating, sometimes it’s irregularity, and sometimes it’s just that “off” feeling (#IYKYK). If your goal is to feel more regular, comfortable, and in control of your gut, this probiotic combines three well-researched strains to support digestion from multiple angles.

Two of them—Lactobacillus acidophilus NCFM and Bifidobacterium lactis Bi-07—may help reduce bloating and support overall digestive comfort, particularly for people with functional GI issues like IBS. Lactobacillus acidophilus NCFM may also help with lactose digestion, which can make dairy a little less of a gamble (not a free pass, but likely more forgiving).

Bifidobacterium lactis HN019 is your “let’s keep things moving” support. It may speed up transit time and improve regularity—especially helpful if you tend to feel a little “backed up” or inconsistent with your bathroom patterns.

It’s also low-lift to stick with: one capsule a day, no refrigeration, no timing stress—just take it and move on with your day. The only caveat is around testing—while the brand reports third-party testing through ISO-certified labs, it doesn’t carry verification from more widely recognized organizations like NSF.

A healthy vaginal microbiome helps protect against infections and maintain an optimal (slightly acidic) pH. Hormonal shifts, stress, antibiotics, and even changes in routine can disrupt that balance, which is where a more targeted probiotic—especially with Lactobacillus species—can be worth considering.

This probiotic contains 10 billion CFUs across eight strains to support a healthy vaginal microbiome. The formula includes strains naturally found in the vagina, along with researched probiotics that may help support vaginal health and maintain healthy bacteria levels—especially for those prone to issues like odor, irritation, or bacterial imbalance.

What I like here is that it’s not just vaginal support—with strains like L. plantarum and L. acidophilus, you’re also getting gut and immune support, which are all connected. It’s also easy to take: one capsule a day, no refrigeration needed.

And like any supplement, the trade-offs are worth knowing. It uses a proprietary blend, so individual strain doses aren’t broken out. And while it’s made in NSF-certified facilities, it doesn’t carry a finished-product certification like NSF Certified for Sport.

Pregnancy and postpartum are full-body shifts. Your gut, immune system, and even your mood are all in flux, which means your microbiome needs may change too. This probiotic is designed with that in mind, using strains with a strong safety profile and targeted research in maternal health.

You’ll find Lactobacillus rhamnosus HN001, which is linked to improved glucose metabolism during pregnancy and lower postpartum depression and anxiety scores. It also includes L. rhamnosus GR-1 and L. reuteri RC-14, a well-studied combination for vaginal and urogenital health. Plus Bifidobacterium lactis HN019 may support digestion and bowel regularity—goodbye pregnancy constipation—along with a prebiotic blend to help good bacteria thrive.

Ritual also puts real thought into delivery (pun intended). The nested capsule design helps protect the probiotics as they move through your digestive tract, and the moisture-controlled bottle helps maintain potency over time.

There are a few trade-offs to keep in mind. The citrus-flavored capsule is meant to make it more pleasant to take, but might exacerbate pregnancy nausea. And while each batch is tested for microbes, allergens, and heavy metals, the brand doesn’t clearly disclose any third-party certifying labs—though it does maintain strong transparency around ingredient sourcing and labeling.

One final, important callout: while these strains have strong safety profiles and research in maternal health, they don’t consistently change outcomes like vaginal microbiota across the board. As always, it’s worth checking in with your healthcare provider to make sure it fits your specific needs during pregnancy or postpartum.