Bio Complete 3 Reviews

Bio Complete 3
( 138 reviews )

Bio Complete 3 Review: Legit or Scam?

Reviewopedia staff  -  Updated:  November 15, 2023
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Bio Complete 3 is a dietary supplement created by Dr. Steven Gundry, a doctor who’s well-known for his promotion of gut-health supplements.

Gundry states he believes that beneficial microbes in your digestive tract are the key to good digestive functioning, as well as overall health.

Bio Complete 3 is part of his ‘Gut Health Starter Kit’ that also includes MCT Wellness and Total Restore.

Below, we take a look at the available research regarding the claimed benefits of Bio Complete 3, customer reviews, and let you know if we think it's worth buying.

How Does it Work?

The Bio Complete 3 formula approaches gut health by supplying three key ingredients: probiotics, prebiotics, and postbiotics.

By now, most people are aware of the benefits of probiotics, but not necessarily about prebiotics and postbiotics

Gundry states that he believes that these ingredients provide the ultimate support for building healthy gut flora when taken together.

He claims the resulting benefits include:

  • Easier digestion
  • Help with weight management
  • Increase in energy
  • Gut lining support
  • Minimize unhealthy food cravings
  • Cognitive support
  • Improvements in skin health

Key Ingredients

Bio Complete 3 includes three blends that are made up of primarily proprietary formulas of probiotics, prebiotics, and postbiotics.

1.  Prebiotic Blend (450mg)

The prebiotic blend contains the following ingredients:


This patent-pending ingredient is commercially produced for supplement makers to include as a boost to probiotic products.

SunFiber® partially hydrolyzed guar gum (PHGG)

Another proprietary ingredient, this plant derived soluble fiber has a number of benefits.  The company manufacturing Sunfiber states that it is clinically shown to

  • regulate diarrhea and constipation [1]
  • maintain microflora and digestive health
  • increases satiety

They also believe SunFiber is superior to other fiber supplement on the market because, unlike Inulin and other soluble fibers, SunFiber ferments in the gut slowly, reducing the chances of bloating and gas.

The manufacturer's website links to a number of studies supporting their claims.

For instance, one study on athletes found that PHGG:

  • improves gastrointestinal health
  • results in diarrhea reduction and improves lifestyle quality
  • PHGG fiber diet is critical for microbiota of subjects who exercise
  • lowers abundance of harmful bacteria and increases energy recovery in athletes

2.  Postbiotic Blend (300 mg)

The postbiotic blend contains the following ingredients:

CoreBiome® Tributyrin

This is a saturated short-chain fatty acid that “is a butyric acid precursor and has a key role in anti-inflammatory and intestinal barrier repair effects.” [3]

Butyrate is critical for gut health because it is an energy source for colonocytes (epithelial cells that line the colon).  These cells are vital to a properly functioning gut lining.

Butyrate is also produced by bacterial fermentation of dietary fiber in the colon. [4]  This is also why a diet high in resistant scratches is helpful to your gut.

One animal study used antibiotics to induce gut microbiota disorder in mice to see the influence of Tributyrin on this disorder.

They concluded that,

"we demonstrated the benefits of TB (Tributyrin) supplementation on gut microbiota disorder caused by antibiotics. Our results revealed that TB might restore gut microbiota to produce SCFAs, inhibit the over-activation of the NLRP3 inflammasome and attenuate intestinal injury.” [5]

There is even a currently ongoing study testing the effects of Tributyrin supplementation on Parkinson's disease. [6]


3.  Probiotic Blend (22 mg)

The probiotic blend contains the following ingredients:

Bacillus Coagulans (ProDura®)

According to Gundry MD this probiotic strain was selected because it closely resembles the strains of good bacteria found in the gut, specifically in their ability to resist strong gastric acid and high temperatures. [7]


Bifidobacterium bifidum

Another beneficial strain of probiotics found in adults and children.  There is research supporting its potential benefits with one study concluding that,

"Bifidobacteria may exert protective intestinal actions through various mechanisms, and represent promising advances in the fields of prophylaxis and therapy." [8]

One bottle of Bio Complete 3 contains a 30-day supply, with two capsules meant to be taken daily.  The dosage is the same regardless of weight or age.

Customer Reviews & Complaints

GundryMD, the company behind Bio Complete, currently has an A+ rating with the BBB.

The company has an average rating of 3.96 / 5 stars from over 4,000 customer reviews there, with 72 customer complaints filed in the last 12 months.

On Amazon, Bio Complete 3 has mixed reviews with a rating of 3.9 / 5 from over 4,000 customer ratings.

See Bio Complete 3 reviews on Amazon.

A small number of users complained that Bio Complete 3 can have some pretty extreme side effects when you first begin taking these supplements.

This is particularly true if you take more than the recommended dosage, as the capsules are specially formulated and consuming too many can have a heavy impact on your digestive tract.

Symptoms such as bloating and gassiness are not uncommon when you begin to take fiber and probiotics, so bear this in mind.

While these symptoms are not usually serious, they can be unpleasant to deal with.

In general, across different review sites users mentioned the following:

Positive customer reviews commonly mentioned:

  • Increased energy levels
  • More regular and smoother bowel movements
  • Losing belly fat
  • Less bloating


Negative customer reviews commonly mentioned:

  • Seeing no changes from taking Bio Complete 3
  • More frequent trips to the bathroom
  • Cramps
  • Too expensive for what it is

See Bio Complete 3 reviews on Amazon.

Customer Service

If you need to contact customer service at Bio Complete 3,  you can call the customer support lie at (800) 852-0477.

GundryMD lists their contact information as:

Telephone: (800) 852-0477
Email: [email protected] states that all supplements bought through the Gundry MD website are backed by a 90-day money-back guarantee.

If you aren’t happy with your purchase, you can call the customer support phone line to start your refund process. 


Cost & Price Plans

On you can buy one bottle of Bio Complete 3 for $69.95, including shipping.

You can also get a discount if you make a larger order ( 3 bottles for $188.85 or 6 bottles for $353.70), or sign up for a “My Health Account” and subscription plan.

When you do this, you will receive an automatic monthly shipment of Bio Complete 3 in addition to unique discounts that lower the price to $41.95 per bottle (or more, if you buy in packages of three or six).

You can buy Bio Complete 3 directly from, as well as on Amazon.

See Bio Complete 3 price on Amazon.

Competitors and Alternatives

Below are some other brands you may have come across while researching gut health.


Align Probiotics

Align is one of the most popular brands of probiotics.  

If you feel that you don’t need the additional prebiotic support, this is a straightforward option that features one strain of probiotics.

The company claims its formula helps soothe occasional abdominal discomfort, gas, and bloating.  It contains 5 billion CFU of live bacteria.

It is currently an Amazon Choice selection and has great reviews averaging a 4.7/5 from almost 5k ratings.  

Check Current Price on Amazon


SuperGut  -  (Detailed Review)

We feel this is a really good option for a gut health supplement.  Their Prebiotic Fiber Mix focuses on increasing your intake of resistant starch.

This type of prebiotic fiber is designed to feed the good bacteria in your gut along with other benefits like supporting a healthy weight, blood sugar control, improved digestion, and reduced inflammation.

Supergut is one of few supplements that has clinical research support for the supplement itself (not just for the individual ingredients).

It is also "Monash University Low FODMAP Certified".  One packet provides 8g prebiotic fiber, 1g of net carbs, 0g sugar, and only 15 calories.  

Learn More About SuperGut.


Emma Digestive Relief

The key difference to Bio Complete 3 is that Emma contains no pro/post/pre biotics.

Instead their formula relies on a combination of herbs featured in traditional medicines such as Berberine and Deglycyrrhizinated Licorice. 

It also makes use of Quercetin, Resveratrol and other common vitamins and minerals.

Overall, we do not recommend Emma.  This is due to the limited scientific support for their ingredients and the significant number of negative reviews the product has received on Reviewopedia.

The Bottom Line

Bio Complete 3 combines three proprietary ingredients that have manufacturer backed research supporting their benefits.

Although the research is promising, it appears that, based on dosage, the highlight of this formula is Tributyrin.

While the SunFiber has the most research supporting its use there is only 450mg of it found in Bio Complete 3.

SunFiber actually makes their own SunFiber GI supplement that includes 6 grams of guar fiber and 8 billion CFUs of bifidobacterium lactic strain of probiotic.  

It’s an "Amazon Choice" product with good reviews from customers. 

Given that the National Food Consumption Survey estimates that only 5% of people are meeting their fiber intake requirements, focusing on fiber could be a good starting point in addressing gut issues.

Bio Complete 3 is regarded as generally safe, but it's a good idea to consult with your doctor before taking any new supplements, especially if you are on other medications.

If you have any experience with Gundry MD Bio Complete 3, please leave your reviews below.

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Bio Complete 3 Customer Reviews

  • Sort Reviews By:

Same Old Sales Pitch
May 23, 2024
I can't give it a rating. He used the same sales pitch to sale olive oil as he is using for Bio Complete 3. It helped him lose 70 pounds and keep it off. I can't remember all of the other ones before that but I do remember that sales pitch. Because of that I just can't trust him.

This product is for real.
February 15, 2024

I am a 68-year-old male who has been having digestive problems for the last five years; bloating, abdominal pain, alternating with bouts of diarrhea. I tried various probiotics and also digestive enzymes with some relief but had to make constant adjustments. Other than this, by the way, I am very fit and healthy.

I never watch these online marketing videos, but the subject matter got my attention, and I ended up watching the Bio Complete 3 video all the way through. As miserable as this problem was making me, I thought I may as well try it. Within just a couple of days I noticed improvement. Every day starts good when you are regular in the morning and not suffering from bloating and constipation. I have been using this product for three weeks now and it has eliminated 90% of my problems.

Hoping to continue improving my overall health.. James Lunsford
February 15, 2024

Overall, your product has helped me, not only with my intestional problems, but since I have persuaded my wife to also take part in two of your product. My wife has needed it more than me, but since she has been taking a substantial amount of narcotics for a total of seven back surliest, and due to her having a hemi-colectomy, her bowels have been a nightmare. With only two weeks of use, I see a big improvement with her bowels. My bowels were not that bad, but even

I have experienced , an improvement. I na 76 years old, and the healthiest person in my home, in that I am more alert, than I was at the age of forty. I still work as a certified registered nurse anesthesia and spend around $300 dollars per month on vitamins, minerals and other Health aids. If I quit taking these natural health aides for there or four days, I can feel the difference. I farm sheep and chickens, and pastor a church. So far, I am sold on your products. I’m anxious to find out and try your new products,


Stomach issues gone!
February 13, 2024

I have been having gut issues for 3 yrs now. Nausious all the time. When I ate I felt sick, if I didn't eat I felt sick.

2 weeks on bio complete 3, with the retoral along with lectin blocker and now I can eat almost normal again.

Bowel movements are now as they should be.

This product is a blessing for me, thank you!

Bio complete 3
February 13, 2024

This is the best product

I can recommend it to everyone who has bowel issues

Since I am taking it my problems are finally solved after many years of struggling

Gives some relief
February 10, 2024
I take meds that constipate me. this Bio C 3 has really helped me. I would recommend you give this a try if you have any problems with your gut and bowel movements.

My Bowel movements are regular and no straining!!
February 10, 2024
I take both Bio Complete 3 and the Total Restore. The best thing I noticed is more bowel movements with no straining and no laxatives. Is this from the Complete 3 or the Total Restore or combination of the 2? I really love that you check on me and I can finally ask questions! I think as time goes on, I will hopefully get rid of the bloat. I continue to use both every day, so don't worry Dr. Gundry!!!

It does work!!
February 9, 2024

Main reason I purchased Bio-C3 was because I was experiencing intestinal problems. I was told after a colonoscopy that I had a tear in my lower intestine.

Shortly, my mom had a case of diverticulitis and was hospitalized.

I listened to your presentation and was willing to try and see if this would help. Well, it has, for both of us!

I'm also loosing that bloated feeling and what I believe was inflammation. I feel much better and I can see that my mom is also feeling better.

Results Are Amazing!!
February 6, 2024
My wife and I started on this journey of eating lectin free about a month ago. Also, we chose to take Bio Complete 3 along with Total Restore. The results are amazing! I’ve lost 26 pounds and have a tremendous amount of more energy. Also, I’ve struggled with BP for years and my BP is nearly at normal level of 120/80. I’ve also have had Psoriasis over the years and it’s almost completely healed. My wife has lost nearly 15 pounds and has battled stomach issues all her life. Her stomach issues are 100% better. She’s ecstatic over how she feels. We’re sold, to the point that we’re sharing our results with family and friends. Thanks Dr. Gundry, our lives have been changed!!

Helped reduce brain fog and mental discombobulation.
February 3, 2024

I have now been taking the Bio Complete 3 tablets for 12 days and I already feel some of the benefits;

My Condition: I suffer from chronic debilitating pain in most of my body with dreadful brain fog 24/7/365, which makes me feel mentally discombobulated and unable to concentrate.

However, since taking the Bio Complete 3 tablets my brain fog seems to have eased up somewhat and I am again able to at least follow a thread / plot in a film - (they have reduced the brain fog from about 7/10 to about 5/10).

In reference to the fibromyalgia pain in the body, that is still present and remains chronic at about 7/10 to 8/10.

It is still early days yet, hopefully there will be more benefits showing up soon that I can report on.

BioComplete3 is a Great Supplement
February 3, 2024
I have been irregular, a movement occuring every 3-5 days for two years. After two days of taking BioComplete3, I began to become regular. I have been taking the prebiotic/ probiotic for a month. I am amazed at how quickly the formula made me feel normal. I will continue to take the pills as I do believe that they have addressed some health imbalance that I have been having a hard time resolving. I feel great. Thank you for the opportunity.

February 3, 2024
I have been constipated all my life. I have been on Dr.Gundry’s Bio-Complete 3 for about 7 days. I have had a normal bowel movement for the last 3 days. Unbelievable. I have taken Lactulose, Sennokot, Dulcolax 5-8, Restoralax, Colon Ultra Cleanse, Suppositories & still not gone. Maybe a small liquid movement, which would happen at the most inappropriate moment. If no other promise happens, which I am sure they will, my bowel problem was my #1 problem. If this continues I will be for ever happy.

Good so far but less than a month in..
February 2, 2024
I have only been taking it for about 2-3 weeks now so too early to tell and why I didn’t give 5 stars. I wasn’t sure what to expect since I’ve never really taken pre-biotics before and since this is a combination of three different kinds, I really didn’t know what to expect. All I can say is my digestive system seems fine but it always was ok. I don’t take any other fiber, supplements, or Metamucil, or anything now and even on a trip to Mexico my digestive tract issues with constipation didn’t exist.. So it must do something to keep things moving in the right direction. My wife started it as well, so she will be a better gauge. All in all I think it’s doing good and we will give it a couple more months before truly deciding.

Calm Stomach
January 31, 2024
Good morning Dr. Gundry. I am pleased to say that my stomach has calmed down considerably since I started. I was on a dual encapsulated product from Life Extensions prior to starting yours and most days I would also need plant enzymes for my irritable stomach which I don't require now unless I eat something super spicy. I am really pleased with your product. Thank you.

Great product
January 31, 2024
Since taking this probiotic my digestive system has really calmed down and I have been able to lose a little weight. Nice product overall though a little pricey.

Bio Complete 3
January 29, 2024
I feel more energetic and I feel that Bio Complete 3 is helping to curb my appetite. I’ve noticed that I’m sleeping better at night. I’m very happy that I tried your product .

I am regular again
January 28, 2024

I started using Bio Complete 3 about a month ago because I am 79 years old and was not regular as I was in my younger days. On day two I noticed an immediate change. I no longer had to "press hard" to have a bowel movement and since that time I have been regular daily the first thing each morning which I know is a lot healthier for me.

Thanks Dr. Gundry

January 28, 2024

I have had IBS with constipation for years, have tried everything, Fod Map Diet, Fecal Matter Transfer, I take Movical to move my bowels everyday, I also have algeries to Pip fruit, Stone fruit, raisins sultanas, nuts, so my diet is pretty yuk.

I started Bio Complete 3 three weeks ago and are feeling so much better already.

I now only take one Movical a day, most of the pain has gone, and my bowel movements are so much improved.

I am hoping my weight will start to reduce, but at the moment am so happy just to be feeling so much better.

It’s like a new day!
January 27, 2024
After suffering from abdominal issues over the last several years resulting from radiation therapy for endometrial cancer and having a number of tests and prescriptions to resolve the problem, I gave up and figured I would just have to learn to live with the pain and diarrhea, I found Dr. Gundry’s Bio Complete 3 and decided to buy 1 bottle just to see if it would work. Within the first 48 hours I realized I felt really good. Following the directions throughout the month I found the issues I had suffered with disappeared. I could not believe it…still can’t!! I am overjoyed and have shared the results with my doctor. She told me keep using it. I will never be without Bio Complete 3!!! Thank you, Dr. Gundry!!!

This stuff works!
January 26, 2024
Hey, I just wanted to say that I have had a regularity probably most of my life. I don't have all of my digestive enzymes and tack. Apparently I'm lacking pepsin and if I've ever eaten anything heavy like steak, I just knew there was no way that was passing through so I would spend my days off having to stay around the house doing. A: cleanse just because my digestive track was not doing what it was supposed to be doing. So I just wanted to say that the night that I started taking these I immediately the next day have been regular everyday since! I have now been going to the bathroom sometimes up to three small times a day but definitely one time a day which before I was lucky to go once a week it was not healthy! It feels so good to have that feeling back!!