The Best Probiotic for Men, According to a Certified Nutrition Coach (2026)

The best probiotics aren’t always about the number of living cells advertised in the product; it’s about the quality, as well. Every dose of Seed DS-01 Daily Synbiotic contains 53.57 active fluorescent units (AFUs), which, according to studies³⁶, may be a more accurate measurement of living, active cells in comparison to traditional CFU (colony-forming units) numbers. 

The strains found in Seed are specifically chosen to support digestive health, gut immunity, dermatological health, cardiovascular health, and micronutrient synthesis. The company also uses its ViaCap technology to deliver the probiotics, a 2-in-1 capsule consisting of a prebiotic outer layer and a probiotic inner layer.

This creates two barriers to help the probiotics survive warm temperatures: moisture and stomach acid. The active strains can then be delivered safely to the large intestine and colon. 

As for allergens, Seed Daily Synbiotic is carefully tested for the most common allergens, including gluten, dairy, soy, nuts, shellfish, sesame, corn, and glyphosates, and there are no binders or preservatives. 

Our tester noted that while he has a sensitive stomach, these probiotics didn’t cause any irritation or discomfort, and he gave Synbiotic a 5 out of 5 for the effects. “The pill did a great job with my sleep, and it performed well when I consumed foods or other supplements. Seed helped to make my consumption of pre-workout less irritating on my stomach,” he said.

Transparent Labs is consistently one of our favorite brands due to how clean its supplements tend to be, and that extends to the Probiotic-Advanced Gut Health formula. Not only is it chock full of live gut bacteria that can have major benefits for your gut and immune health, but it’s also free from gluten, artificial sweeteners, artificial colorings, and preservatives; all of which could cause bloating and negatively impact your immune system. 

The brand goes a step further by offering third-party testing results on its website, so you can see for yourself how the product fared when testing for everything from lead and arsenic to E. coli and salmonella. Then, there’s the quality of the probiotics themselves, which scored well across the board with our testers.

You get the point—it’s chock full of live gut bacteria that have major benefits for your gut and immune health. What’s more, it’s free of artificial sweeteners, artificial colorings, and preservatives, all of which could cause bloating and negatively impact your immune system. 

Each serving is only two pills and they’re quite easy to swallow. We like that the capsules are made with hypromellose to ensure a delayed-release delivery until they reach the intestines⁸.  Our tester was also impressed that there was no taste or smell, or any noticeable side effects, giving this formula a 5 out of 5 for side effects.

Ritual Synbiotic+ is “cutting edge and a winner,” says supplement expert and registered dietitian Bob Iafelice. He points to the 11 billion colony-forming units (CFU) of the two most-studied strains of good bacteria (BB-12 and LGG), the delayed-release capsule to bypass stomach acid, and additions of prebiotics and postbiotics as his reasoning for recommending this as the best probiotic supplement for men. Our tester also gave Ritual Synbiotic+ a 5 out of 5 for flavor, saying the peppermint flavor is very refreshing.

The BB-12 and LLG strains have been linked to improved gastrointestinal and immune health, and Iafelice says the 11 billion CFU dose is large enough to be effective.

The registered dietitian was also impressed with the inclusion of tributyrin, a postbiotic. The International Scientific Association of Probiotics and Prebiotics (ISAPP)²⁰ defines postbiotics as the byproduct of postbiotics feeding off of prebiotics. One example of a postbiotic is butyrate, a short-chain fatty acid that a January 2018 review²¹ reported could help with immunity and ease inflammation, though the researchers specified more research needed to be done. 

Tributyrin is a more effective form of butyrate, according to Iafelice. “It’s great for maintaining the integrity of the gut lining,” he says. “Of course, this is critical for protecting against autoimmune conditions.”

The natural question is, “Do I need postbiotics in my probiotic?” Ritual would like you to think so, and even did two studies on its supplement’s effectiveness, so maybe you shouldn’t be surprised that they found it had great gut health benefits. 

As a rule, we’re wary of studies done or paid for by supplement companies since they may have a hand in designing the study, which increases the chance of them making it so the study reaches their predetermined conclusion (to be clear, we’re not accusing Ritual of this, but it has been done by some companies). 

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That said, independent research as recent as April 2022²² has said postbiotics should be explored and may have significant benefits. However, more research needs to be done. 

While there are few studies on the effectiveness of vegan probiotics—which, as a reminder, are probiotics that are derived from plant-based food sources rather than dairy or other animal-based products—a wide-ranging review on vegans’ gut health published in April 2019³⁵ found they had a more diverse group of beneficial bacteria than meat eaters. 

Sports Research Daily Probiotics contains 60 billion CFUs of 12 different strains, though the strains are in a blend, so we can’t say exactly how much of each strain you’re getting. Each delayed-release veggie capsule also contains 60 milligrams of an inulin fiber blend, a prebiotic that’s meant to help support the growth of healthy bacteria. 

Even though each capsule is packed with ingredients, our tester was pleasantly surprised by the small size of each pill. They are very easy to swallow and very slim, about penny-sized in length. For swallowability, these probiotics earned a 5-out-of-5 rating. 

Finally, Sports Research Daily Probiotics are certified vegan, cGMP compliant, and third-party tested, so you can rest assured that you’re getting a high-quality formula produced with the highest manufacturing standards. 

Probiotics are often expensive supplements, but they don’t have to be. Nutricost’s Probiotic Complex is extremely affordable, costing $12 to $14 for 60 capsules at the time of writing. 

Thankfully, the low price tag doesn’t mean this is a low-quality product. Each capsule contains more than 10 billion CFUs. The probiotics are also gluten-free, non-GMO, and manufactured in a GMP-compliant facility with third-party testing. 

Our tester has been taking a daily probiotic for years, so she didn’t notice any major changes after trying Nutricost’s Probiotic for several weeks. However, she noted that she remained fairly regular after switching to Nutricost, which she took as a sign that the probiotics were working well. 

She gave the probiotics a 4.5 out of 5 for taste and smell, saying, “I noticed a very slight medicinal kind of smell from the bottle, and you can taste something if it sits on your tongue for too long, but it wasn’t off-putting.”

This is the most affordable probiotic we’ve seen that doesn’t compromise on quality and is a great choice for those looking to add probiotics to their routine while saving money. 

A November 2022 clinical review⁶ found that athletes could improve their performance and even reduce recovery time with probiotic supplementation. We recommend Legion Biome for active fellas because it helps with gut health, is third-party tested for purity and banned substances, and contains all-nautural ingredients.

“What’s not to love about it?” asks registered dietitian Bob Iafelice. ““Each strain is well-researched and there’s a strain from each major family: Lactobacillus, Bifido, and Bacillaceae. Plus, the potencies are more than adequate for an effective dose.” We rate the overall formulation a 5 out of 5.

On top of promoting better gut health, the probiotic strains in Legion Biome are linked with leaner body composition in NCAA Division I athletes and the general population. Further studies have proven that Bifidobacterium Lactis B420, another strain found in Legion Biome, can help fight intestinal inflammation, which can sometimes be caused by strenuous exercise or training. It’s a good idea to make sure your intestines are taken care of if you plan on exerting yourself (if you catch our drift).

Kate Meier, GGR’s senior director of content and a weightlifting coach, says the 2-capsule serving is easy to take with food each morning, as suggested by Legion. “I had no problem getting them down,” she says.

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The only major red flag is the cost—at around $1.66 per serving, it gets a 1 out of 5 on our pricing scale. You could take a few bucks off this dietitian-endorsed supplement by placing it on a subscription or by using a Legion Athletics Coupon Code.

If you’d rather sip your probiotic, Promix Debloat is the best choice. It comes in tasty flavors like Florida Orange and White Peach, contains all-natural ingredients, is vegan-friendly, and gets a nod of approval from registered dietitian Bob Iafelice.

“It has well-researched bacteria strains, good potency overall, includes a prebiotic, and a nice amount of Vitamin C,” Iafelice says. Some researchers have found that Vitamin C supplementation can help increase the amount of “good” bacteria in the gut, even in fully healthy adults, can help with overall immunity and gut health.

Promix Debloat contains three probiotic strains in the Bacillus family, including Bacillus subtilis. This strain is one of the oldest in the scientific communities and can be found in natto, a Japanese dish made from fermented soy bean curd. It has been linked with improved digestion and intestinal function, a lower risk of irritable bowel syndrome (IBS), and, as the product promises, can reduce bloating and flatulence, according to research.

Iafelice notes there’s no individual strain count, so we’re not sure how much of each is present. He also notes that while turmeric is listed as an ingredient, it’s unlikely to have any anti-inflammatory effect. “Since it is the second last ingredient on the label, it may be just a sprinkle,” he notes.

Biotics 8 is a one-stop shop for individuals’ gut health needs. Like many of our top picks, it comes packed with probiotics (the live bacteria) and prebiotics, which are essentially food for probiotics to help them do their job, according to this 2019 review¹. The combination of these two creates a synbiotic probiotic, which researchers say has promising benefits. ²²

It also contains several digestive enzymes to aid with your digestive system, and according to a February 2016 review², may enhance probiotics effectiveness in treating gastrointestinal diseases (though the researchers clarified more studies need to be done on those claims). 

We like Biotics 8 as the best probiotic for cis men with IBS because it’s specifically formulated for men. One example of this is the addition of vitamin D, which when combined with probiotics could reduce cis men’s overall disease risk and improve several health markers such as insulin sensitivity, according to a January 2021 meta-analysis³.

Vitamin D⁴ and probiotics⁵ have also both been linked to increased testosterone levels in cis men, though Bauer Nutrition specifies it takes about a month of continuous use to notice this benefit. 

Speaking of continuous use, Biotics 8 requires you to take three capsules per day to get the most out of its probiotics, which is about the average amount of other probiotics. It’s best to take these all at once first thing in the morning.   

Another benefit of Biotics 8 is it doesn’t have to be refrigerated, so you can take them on the go. Refrigerating probiotics tends to make them last longer, as heat can kill the organisms inside, but that doesn’t seem to be a problem here. 

Prebiotics act as a food source for probiotics to ensure they’re lively by the time they reach your digestive tract. Registered dietitian Bob Iafelice says that’s one of the factors that make Ora Organic Probiotic with Prebiotic a good choice for those looking after their gut health. “Overall, it’s a very good formula,” he says. “It has multiple, well-researched strains.”

One such strain is Lactobacillus acidophilus, which researchers say could help treat chronic and acute diarrhea, as well as autoimmune autistic disorder (AAD). Children with autism sometimes, though not always, have AAD and may have irregular bowel movements.

Ora uses organic Jerusalem Artichoke Inulin as one of its prebiotic source. It’s a non-digestible fiber that has multiple health benefits, including lowering blood sugar, reducing the risks of certain types of cancer, improved bowel movements, and may help alleviate symptoms of depression, according to research.

The downside, however, is that Ora Organic uses a proprietary blend so we’re unsure of how many colony forming units (CFUs) there are for each strain. “The problem here is that, potentially, one strain could make up 90% of total,” Iafelice explains. “Because of this negative, I would give this a 4, but not a 5.”

Two of our expert testers agreed the 2-capsule serving is doable, though they noted they were on the larger side. “Some people who don’t like swallowing pills may think it a challenge,” says Caine Wilkes, an Olympic weightlifter who represented Team USA in the 2020 Olympics.

The bacteria found in some probiotics is sometimes treated with heat, which can decrease the positive side effects of those strains (this is done to reduce some potential negative side effects of ingesting live bacteria). Garden of Life uses a “raw” probiotic, which is when companies use bacterial strains extracted from whole foods instead of isolated strains. 

There are limited scientific studies on raw probiotics, but a small August 2012 study¹⁷ found promising results when it came to improvements in gut health. 

Garden of Life uses a mixture of Bulgarian yogurt, which was featured in a February 2021 review¹⁸ for the unique bacteria found in it and their potential benefits on human gut health, Eastern European kefir (a fermented milk drink that has active cultures), and scobies (the bacteria that works alongside yeast to ferment drinks like kombucha). 

Our tester gave this product a 5 out of 5 for the side effects and results, saying he didn’t experience any side effects, and his bowel movements were better than usual.

It also contains an original probiotic strain called Lactobacillus fermentum, which researchers in April 2011 reported ¹⁹ was linked to an improved immune system in athletes and active cis male adults. While most probiotic strains are fine for men and women, the researchers emphasized that not enough is known about how this specific strain can affect a cis woman’s immune system and that more research is needed. 

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While most brands offer automatically recurring deliveries these days, you still don’t want to sign up for just any supplement. We like Onnit Total Gut Health because it contains five probiotic strains proven to help with digestion and overall gut health, is made by a trusted company, and comes in a convenient package you take each day.

Each 7-capsule serving (more on that in a bit) contains more than just probiotics, but we’re going to focus on them first. Specifically, two strains have been known to aid in weight loss over extended periods: Saccharomyces boulardii and Lactobacillus rhamnosus. The former had positive results in a small, limited study and the latter helped test subjects lose 50% more weight than those on a placebo.

There’s also prebiotics, which act as a food source for probiotic bacteria, and a digestive enzyme blend. Lastly, Onnit Total Gut Health contains betaine HCI, a compound that has been used to alleviate digestive distress in patients.

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As we mentioned, Onnit Total Gut Health is a 7-capsule serving. That’s a lot, especially for those who don’t like swallowing pills, but on the bright side this one-stop shop for all your digestive needs comes in a packet, so it’s easy to travel with and none of your capsules will get lost.

The price is also pretty steep, at $2.53 with the subscribe-and-save option.