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Item #PAS01

Dr. David Williams

Probiotic Advantage

Everyday Digestive Comfort and Support

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Additional Product Details

Guaranteed delivery to the gut for everyday digestive support

Probiotic Advantage is like a multivitamin for your digestive system. Nurturing the delicate balance of beneficial bacteria in your digestive tract is absolutely critical for optimal health. Dr. Williams believes everyone should be taking a probiotic supplement, even if you don't have digestive health concerns. It's cheap daily insurance!

Probiotic Advantage delivers 2 billion live bacteria in 7 hardy, specially selected strains throughout your digestive tract. The patented BIO-tract® delivery system slowly releases the probiotics for all-day digestive support. And special LiveBac® technology helps keep the bacteria alive so they safely get to your intestines where they are needed for overall digestive health. This advanced LiveBac technology ensures potency for 18 months without any refrigeration.

Probiotic Advantage provides 7 targeted probiotic strains for digestive support

Many probiotic supplements contain just 1 or 2 strains of bacteria—giving you only partial coverage. But each Probiotic Advantage caplet gives you 7 extremely hardy, carefully selected, live probiotic strains.

You get the top Lactobacillus strains, L. fermentum, L. plantarum, L. acidophilus, L. rhamnosus, and L. salivarius, the most prevalent bacteria in your small intestine. Plus, the top Bifidobacteria strains, B. bifidum and B. longum, the most common strains in your large intestine. Together they help support your digestive and overall good health.

Plus, Dr. Williams added prebiotics to Probiotic Advantage to help feed and nourish these good bacteria. The prebiotics "supercharge" the probiotics, so the good bacteria crowd out the non-beneficial bacteria.

Probiotics have always been a part of Dr. Williams' core recommendations. Dr. Williams can't emphasize enough how important they are to your overall good health. And you'll feel the difference with just one tiny easy-to-swallow caplet a day.

Ingredients and Dosage

Doctor's Suggested Use: Take one (1) extended-release caplet daily, with or without food.

Serving Size: 1 Caplet
Servings Per Container: 30

Ingredient Amount Per Serving % DV
Probiotic Blend (120 mg)
Limosilactobacillus fermentum
Lactobacillus acidophilus
Lactiplantibacillus plantarum
Lacticaseibacillus rhamnosus
Bifidobacterium longum
Ligilactobacillus salivarius
Bifidobacterium bifidum

2 billion CFU *
Fructooligosaccharides (FOS) 25 mg *
*Daily Value (DV) not established.

Other ingredients: Microcrystalline cellulose, hypromellose, pectin, stearic acid, silica, sodium carbonate, guar gum, and turmeric oleoresin (color).

Precautions: Consult your health care practitioner before use if you are pregnant or nursing, have or suspect a medical condition, or use any medications. Discontinue use two weeks prior to surgery or if any serious adverse reaction occurs. Do not use if safety seal is missing.

Keep out of reach of children.

With BIO-tract®, a registered trademark of Probi USA, Inc.


  • Gluten Free

Science and Quality

  • Individuals with milk sensitivities are able to tolerate dairy that includes probiotics better than dairy that lacks probiotics.1

1 Alm L. J Dairy Sci 1982;65(3):346–52.

Product Quality

  • Each ingredient's potency is verified. View the Certificate of Analysis.
  • Manufactured to exacting standards using highest quality raw materials
  • Produced in accordance with our strict Standard Operating Procedures (SOPs) that meet those set by the FDA’s Good Manufacturing Practices
  • Every batch tested to verify purity and potency specifications are met
  • Quality assured with our Triple-Testing Philosophyâ„¢
  • Backed by our 100% satisfaction guarantee

What is Probiotic Advantage, and what does it do?

Probiotic Advantage is a once-daily probiotic supplement formulated to support digestive health with seven beneficial probiotic strains and a prebiotic (FOS). Its extended-release BIO-tract® delivery technology helps protect probiotics as they move through the digestive tract, supporting delivery where they can be most beneficial.
Read More
Probiotic Advantage is designed to help maintain a healthy balance of beneficial bacteria in the digestive system. Each once-daily extended-release caplet provides a blend of seven probiotic strains—including Lactobacillus and Bifidobacterium species—plus fructooligosaccharides (FOS), a prebiotic that helps nourish beneficial bacteria. Unlike many conventional probiotics that release quickly in the stomach, Probiotic Advantage uses BIO-tract® extended-release technology to gradually release probiotics throughout the digestive tract. This approach helps protect sensitive probiotic organisms while supporting delivery farther into the intestines, where they reside. The formula is intended for daily digestive wellness and can be taken with or without food, making it easy to incorporate into a regular health routine.

How is Probiotic Advantage different from other probiotic supplements?

Probiotic Advantage combines seven probiotic strains with BIO-tract® extended-release technology, which gradually releases probiotics throughout the digestive tract instead of all at once. It also includes a prebiotic to help nourish beneficial bacteria and provides guaranteed potency with every serving.
Read More
Many probiotic supplements deliver their contents immediately after swallowing, exposing probiotics to stomach acid all at once. Probiotic Advantage is formulated differently. It uses patented BIO-tract® extended-release technology that gradually releases probiotics over time as the caplet moves through the digestive tract. This controlled delivery helps support probiotic delivery to the intestines. The formula also combines seven complementary probiotic strains with fructooligosaccharides (FOS), a prebiotic ingredient that serves as nourishment for beneficial bacteria. Together, these features distinguish Probiotic Advantage from many traditional probiotic supplements and make it an excellent choice for individuals seeking convenient, once-daily digestive support backed by thoughtful formulation technology.

What probiotic strains are included in Probiotic Advantage?

Probiotic Advantage contains seven probiotic strains, including Lactobacillus and Bifidobacterium species that are commonly studied for digestive health. Together, they provide 2 billion CFU per serving and are paired with a prebiotic to help support a balanced gut microbiome.
Read More
Each serving of Probiotic Advantage delivers a carefully selected blend of seven probiotic strains:
• Limosilactobacillus fermentum
• Lactobacillus acidophilus
• Lactiplantibacillus plantarum
• Lacticaseibacillus rhamnosus
• Bifidobacterium longum
• Ligilactobacillus salivarius
• Bifidobacterium bifidum
These probiotic species have been widely researched for their roles in maintaining a healthy balance of intestinal bacteria and supporting digestive wellness. The formula provides 2 billion colony-forming units (CFU) per serving and also includes fructooligosaccharides (FOS), a prebiotic fiber that helps nourish beneficial bacteria already present in the gut. Together, these ingredients create a comprehensive daily digestive health formula.

What is BIO-tract® technology, and why is it important?

BIO-tract® is an extended-release delivery system designed to gradually release probiotics throughout the digestive tract. This helps protect probiotic organisms during digestion and supports delivery farther into the intestines compared with immediate-release probiotic supplements.
Read More
The delivery system used in a probiotic supplement can influence how effectively probiotic organisms reach the intestines. Probiotic Advantage uses BIO-tract® extended-release technology, which slowly releases the probiotic blend over time rather than all at once. By extending release throughout the digestive tract, BIO-tract® is designed to help protect probiotics as they pass through the stomach and support delivery farther into the intestinal tract. This gradual-release approach is one of the defining features of Probiotic Advantage and is intended to maximize the value of each daily serving. Combined with the product's seven probiotic strains and prebiotic support, BIO-tract® technology provides an additional level of formulation sophistication beyond many standard probiotic products.

Why does Probiotic Advantage include a prebiotic (FOS)?

Fructooligosaccharides (FOS) are prebiotic fibers that help nourish beneficial bacteria in the gut. Including a prebiotic alongside probiotics helps create an environment that supports healthy intestinal microorganisms.
Read More
Probiotics are beneficial bacteria, while prebiotics are specialized fibers that serve as food for those bacteria. Probiotic Advantage includes 25 mg of fructooligosaccharides (FOS), a well-known prebiotic ingredient that helps nourish beneficial microorganisms in the digestive tract. By pairing probiotics with a prebiotic, the formula provides complementary support for maintaining a balanced gut microbiome. This "probiotic plus prebiotic" approach is sometimes referred to as a synbiotic strategy because it combines beneficial bacteria with nutrients that help support them. Together with seven probiotic strains and BIO-tract® extended-release delivery, FOS contributes to the product's comprehensive daily digestive health formulation.

What are the benefits of taking a probiotic every day?

Taking a probiotic daily can help maintain a healthy balance of beneficial bacteria in your digestive system. Daily probiotic supplementation supports digestive health, promotes a balance of different probiotic strains, and helps replenish beneficial bacteria that may be affected by diet, travel, stress, or other lifestyle factors.
Read More
Your digestive system is home to trillions of microorganisms that make up your gut microbiome. This community of beneficial bacteria plays an important role in digestive health and overall wellness. Everyday factors—including dietary choices, stress, travel, aging, and certain medications—can influence the balance of these microorganisms. Taking a daily probiotic helps replenish beneficial bacteria and supports a healthy microbial balance over time. Probiotic Advantage makes daily supplementation simple with a once-daily extended-release caplet containing seven probiotic strains, a prebiotic (FOS), and BIO-tract® technology for gradual delivery throughout the digestive tract. Consistent daily use helps support ongoing digestive wellness as part of a healthy lifestyle.

How long does it take for a probiotic to work?

Everyone responds differently to probiotics. Taking Probiotic Advantage every day as directed helps support a healthy balance of beneficial bacteria over time.
Read More
There is no universal timeline for experiencing the benefits of probiotics because each person's gut microbiome is unique. Factors such as diet, lifestyle, age, and overall digestive health can all influence results. For many individuals, consistent daily use is more important than expecting immediate changes. Probiotic Advantage is formulated for everyday digestive support with seven probiotic strains, a prebiotic, and extended-release BIO-tract® technology designed to gradually release probiotics throughout the digestive tract. Maintaining a consistent daily routine gives beneficial bacteria the opportunity to become part of your ongoing digestive wellness regimen. As with many nutritional supplements, the greatest benefits are often seen with regular use.

When is the best time to take Probiotic Advantage?

Probiotic Advantage is designed to be taken once daily and may be taken with or without food. The most important factor is taking it consistently every day to help support a healthy balance of beneficial bacteria.
Read More
Unlike some supplements that require specific timing, Probiotic Advantage offers flexibility. The recommended serving is one extended-release caplet daily, with or without food. Because the formula uses BIO-tract® extended-release technology, the probiotics are gradually released throughout the digestive tract rather than immediately after swallowing. This allows you to choose the time of day that best fits your routine, making consistent daily use easier. Whether taken with breakfast, lunch, dinner, or on its own, establishing a regular habit helps support ongoing digestive wellness and promotes compliance with your supplement routine.

How many CFUs does Probiotic Advantage contain, and is that enough?

Each serving of Probiotic Advantage provides 2 billion colony-forming units (CFU) from seven probiotic strains. Rather than focusing on the highest CFU number alone, the formula emphasizes targeted strain selection, guaranteed potency, and extended-release delivery technology.
Read More
Consumers often compare probiotic supplements based on CFU counts, but experts recognize that formulation quality is about more than just a larger number. Probiotic Advantage delivers 2 billion CFU from seven complementary probiotic strains selected to support digestive health. The formula also features guaranteed potency and BIO-tract® extended-release technology, which gradually releases probiotics throughout the digestive tract. Together, these design features help differentiate the product from supplements that focus primarily on high CFU counts without considering delivery. Selecting beneficial strains, maintaining potency, and supporting effective delivery all contribute to a thoughtfully designed probiotic supplement.

Does Probiotic Advantage require refrigeration?

No. Probiotic Advantage is formulated for convenient daily use and does not require refrigeration. Store the product according to the label directions to help maintain its quality and guaranteed potency throughout its shelf life.
Read More
Many consumers wonder whether probiotic supplements must be refrigerated to remain effective. Advances in probiotic formulation and manufacturing have made shelf-stable probiotic products increasingly common. Probiotic Advantage is designed for convenient everyday use without refrigeration, making it easy to take at home, at work, or while traveling. The formula is manufactured to provide guaranteed potency throughout its shelf life when stored according to the product label. Combined with its once-daily dosing and extended-release BIO-tract® delivery system, this convenience helps support consistent daily use, which is an important part of maintaining digestive health over time.

Can I take Probiotic Advantage after taking antibiotics?

Many people choose to take probiotics after completing a course of antibiotics because antibiotics can affect both harmful and beneficial bacteria in the gut. If you're taking antibiotics or have recently finished them, ask your healthcare provider whether adding a probiotic is appropriate for you.
Read More
Antibiotics are designed to eliminate harmful bacteria, but they may also reduce populations of beneficial bacteria that naturally live in the digestive tract. For this reason, many healthcare professionals recommend considering probiotics during or after antibiotic use as part of an overall digestive wellness strategy. Probiotic Advantage provides seven probiotic strains along with a prebiotic to help support a balanced gut microbiome. While the product is designed for everyday digestive health, individual recommendations regarding antibiotic use can vary depending on the medication and personal health history. Always follow your healthcare provider's guidance regarding the timing of probiotics and prescription antibiotics to ensure both products are used appropriately.

What is the gut microbiome, and why is it important?

The gut microbiome is the community of trillions of microorganisms that naturally live in your digestive tract. Maintaining a healthy balance of these beneficial bacteria supports digestive health and plays an important role in overall wellness.
Read More
Your digestive tract is home to a diverse community of bacteria and other microorganisms collectively known as the gut microbiome. These beneficial microbes help maintain normal digestive function and contribute to a healthy intestinal environment. Diet, age, stress, travel, illness, and other lifestyle factors can influence the balance of the microbiome over time. Probiotic Advantage is formulated to help support this natural balance by supplying seven carefully selected probiotic strains along with fructooligosaccharides (FOS), a prebiotic that nourishes beneficial bacteria. Combined with BIO-tract® extended-release technology, the formula is designed to support the delivery of probiotics throughout the digestive tract as part of a daily digestive wellness routine.

Can I take Probiotic Advantage with other vitamins and supplements?

For most healthy adults, Probiotic Advantage can be incorporated into a broader dietary supplement routine. If you take prescription medications or have an underlying medical condition, consult your healthcare provider before adding any new supplement.
Read More
Many people combine probiotics with multivitamins, digestive enzymes, fiber supplements, omega-3s, magnesium, or other nutritional products as part of a comprehensive wellness program. Probiotic Advantage is designed as a once-daily digestive health supplement and may fit easily into many existing routines. Because every individual has unique health needs, it's always a good idea to discuss your supplement regimen with your healthcare provider, especially if you take prescription medications, have digestive disorders, are immunocompromised, or are pregnant or nursing. Following the product's suggested use and maintaining consistency can help you get the most from your daily digestive health routine.

Why choose a multi-strain probiotic instead of a single-strain probiotic?

Different probiotic strains have different characteristics. A multi-strain probiotic like Probiotic Advantage provides a combination of beneficial bacteria that work together to support digestive health and promote a balanced gut microbiome.
Read More
No single probiotic strain performs every function within the digestive tract. Different species and strains have been studied for different roles in supporting digestive wellness and maintaining microbial diversity. Probiotic Advantage combines seven probiotic strains, including multiple Lactobacillus and Bifidobacterium species—to provide broad digestive support rather than relying on just one organism. The formula also includes FOS, a prebiotic that nourishes beneficial bacteria, and BIO-tract® extended-release technology that gradually releases probiotics throughout the digestive tract. Together, these formulation features make Probiotic Advantage a thoughtfully designed multi-strain supplement for individuals seeking comprehensive daily digestive health support.

Can probiotics support immune health?

A large portion of the body's immune system is associated with the digestive tract, making gut health an important part of overall wellness. By helping maintain a healthy balance of beneficial bacteria, probiotics can support a healthy gut environment that plays a role in normal immune function.
Read More
The digestive tract is home to trillions of microorganisms that interact with the body's immune system every day. In fact, much of the immune system is associated with the gut, making a healthy microbiome an important component of overall wellness. Probiotic Advantage provides seven carefully selected probiotic strains along with fructooligosaccharides (FOS), a prebiotic that helps nourish beneficial bacteria. Together with BIO-tract® extended-release technology, these ingredients help support a healthy balance of microorganisms in the digestive tract. While Probiotic Advantage is formulated primarily to support digestive health, maintaining a healthy gut microbiome is an important part of supporting normal immune system function as part of an overall healthy lifestyle.

What are CFUs, and why do they matter in a probiotic?

CFU stands for "colony-forming units," a measurement of the number of live probiotic microorganisms in a serving. While CFU count is important, probiotic quality also depends on strain selection, guaranteed potency, and effective delivery technology.
Read More
When shopping for probiotics, you'll often see CFU listed on the label. CFU, or colony-forming units, measures the number of live probiotic organisms provided in each serving. However, choosing a probiotic isn't simply about selecting the highest CFU count. The specific probiotic strains, the ability to maintain potency throughout shelf life, and the delivery system all influence overall product quality. Probiotic Advantage provides 2 billion CFU from seven probiotic strains and uses BIO-tract® extended-release technology to gradually deliver probiotics throughout the digestive tract. This balanced formulation emphasizes quality, stability, and targeted delivery—not just a large CFU number.

What's the difference between probiotics, prebiotics, and synbiotics?

Probiotics are beneficial bacteria, while prebiotics are fibers that nourish those bacteria. A product that combines both is often called a synbiotic. Probiotic Advantage includes seven probiotic strains plus FOS, a prebiotic, for complementary digestive support.
Read More
Although the terms sound similar, probiotics and prebiotics have different roles. Probiotics are beneficial microorganisms that help maintain a healthy balance of bacteria in the digestive tract. Prebiotics are specialized fibers that serve as nourishment for those beneficial bacteria. When probiotics and prebiotics are combined in the same product, they're often referred to as a synbiotic because the ingredients work together. Probiotic Advantage combines seven probiotic strains with 25 mg of fructooligosaccharides (FOS), a well-known prebiotic ingredient. This complementary approach helps support a healthy gut microbiome while BIO-tract® extended-release technology gradually releases the probiotics throughout the digestive tract.

How should I store Probiotic Advantage?

Store Probiotic Advantage according to the label directions in a cool, dry place. The formula is designed for convenient daily use and provides guaranteed potency without requiring refrigeration when stored properly.
Read More
Proper storage helps maintain the quality of any dietary supplement. Probiotic Advantage is formulated to remain shelf stable and does not require refrigeration, making it convenient for everyday use at home or while traveling. To help preserve potency, keep the bottle tightly closed and store it according to the label directions in a cool, dry place away from excessive heat and moisture. The formula is manufactured to provide guaranteed potency throughout its shelf life when handled appropriately. Its convenient storage requirements, once-daily serving, and extended-release BIO-tract® delivery system make it easy to incorporate into a consistent digestive wellness routine.

Can travel, diet, and stress affect your gut microbiome?

Yes. Everyday lifestyle factors—including diet, travel, stress, aging, and certain medications—can influence the balance of beneficial bacteria in the digestive tract. A daily probiotic can be part of an overall wellness routine that supports digestive health.
Read More
Your gut microbiome is dynamic and naturally changes throughout life. Factors such as dietary habits, travel, changes in routine, stress, aging, sleep patterns, and certain medications can all influence the balance of beneficial bacteria in the digestive tract. Supporting digestive wellness through healthy lifestyle habits—including a balanced diet, regular physical activity, and consistent probiotic supplementation—can help maintain a healthy gut environment. Probiotic Advantage provides seven probiotic strains, a prebiotic (FOS), and BIO-tract® extended-release delivery technology to support daily digestive health in a convenient once-daily caplet. Incorporating a probiotic into your everyday routine is one way to help maintain beneficial bacteria as part of an overall healthy lifestyle.

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