Why Dr. Tennant Chose These 11 Probiotic Strains?
With so many probiotic strains out there, you might wonder...why these 11?
The answer is simple: effectiveness, synergy, and clinical relevance.
Each strain included in Dr. Tennant’s® Probiotic Formula was hand-selected because it brings something uniquely valuable to your gut health. These aren’t random bacteria—they are backed by science, trusted by clinicians, and proven to play a key role in supporting the body’s natural digestive and immune systems.
Here’s why we chose them:
1. Clinically Studied and Human-Compatible
Every strain in this formula has been extensively studied in humans—not just animals or lab dishes. These are strains found naturally in the human body, meaning your system already knows how to work with them. They're safe, well-tolerated, and have a long history of clinical use.
2. Broad-Spectrum Coverage of the Gut
Different probiotic strains prefer different areas of the digestive tract. Some thrive in the small intestine, others in the large intestine. This formula includes strains like Lactobacillus (which are more active in the small intestine) and Bifidobacterium (which dominate in the large intestine), creating complete coverage of your digestive system from top to bottom.
3. Multi-Benefit Approach
These strains weren’t selected to do just one job. Together, they support:
- Lactose digestion (L. acidophilus, L. bulgaricus, L. casei)
- Immune function (B. lactis, L. rhamnosus, L. salivarius)
- Regularity and relief from bloating (B. breve, B. longum)
- Gut lining repair and anti-inflammatory action (L. plantarum, L. salivarius)
- Colon health and short-chain fatty acid production (B. bifidum, B. animalis lactis)
So whether you’re dealing with sluggish digestion, post-antibiotic imbalance, inflammation, skin flare-ups, or simply want to stay healthy as you age—these strains address the core systems involved.
4. Synergy That Multiplies Their Impact
These strains were chosen not only for their individual benefits, but because they work well together. Some probiotics can compete with each other in the gut or require different pH environments. The strains in this formula have cooperative compatibility, meaning they’re more likely to thrive together, support each other’s growth, and create a healthy, stable microbiome.
5. Proven Results, Without Overloading CFUs
With most supplements, more CFUs (colony forming units) are added to make up for bacterial death in the stomach. But with acid-resistant, time-release capsules, these strains don’t need to be overstuffed into a capsule—they survive the stomach and arrive in the gut ready to work. That means you get quality over quantity: carefully selected strains, delivered with intention, designed to actually work.
The 11 Probiotic Strains That Support a Healthier Gut—and a Healthier You!
Not all probiotics are the same. Each strain plays a unique role in your gut and overall health. Here’s what these 11 powerhouse strains do and why they matter...
1) Lactobacillus acidophilus
One of the most researched and well-known probiotic strains.
✅ Benefits: Supports digestion of lactose, helps balance intestinal bacteria, and boosts immune response.
✅ Why it matters: It produces lactic acid, which lowers gut pH to make the environment less friendly to harmful bacteria and yeast, such as Candida.
2) Bifidobacterium bifidum
Commonly found in both the colon and the lower small intestine.
✅ Benefits: Aids in breaking down complex carbohydrates and proteins, supports immune defense, and inhibits harmful bacteria.
✅ Why it matters: It’s especially helpful in reducing gut inflammation and preventing pathogen overgrowth.
3) Bifidobacterium lactis
A robust strain found in raw milk, widely studied for its powerful immune-enhancing effects.
✅ Benefits: Improves digestion, supports regular bowel movements, and enhances immune function.
✅ Why it matters: It helps increase the body's resistance to infection and supports a balanced gut microbiota.
4) Bifidobacterium longum
One of the first strains to colonize the human gut after birth.
✅ Benefits: Helps break down carbohydrates and scavenge free radicals, supports immune health, and may reduce inflammation.
✅ Why it matters: It plays a role in stabilizing the gut barrier and regulating allergic responses.
5) Lactobacillus bulgaricus
A transient strain often found in fermented dairy products.
✅ Benefits: Helps kickstart fermentation in the gut, supports the digestion of lactose, and contributes to a more acidic gut environment.
✅ Why it matters: While it doesn’t permanently colonize the gut, it supports other probiotic strains and enhances their activity.
6) Lactobacillus rhamnosus
Known for its ability to survive stomach acid and bile.
✅ Benefits: Promotes gut wall integrity, supports urinary tract health, and reduces diarrhea and GI upset.
✅ Why it matters: It's particularly helpful after antibiotic use or digestive distress.
7) Bifidobacterium animalis lactis
A hardy strain known for its resilience and stability.
✅ Benefits: Supports digestion, enhances immunity, and improves stool consistency and frequency.
✅ Why it matters: Clinical studies show it helps reduce bloating and discomfort in people with IBS (Irritable Bowel Syndrome).
8) Lactobacillus salivarius
Naturally found in the mouth and small intestine.
✅ Benefits: Produces enzymes that aid digestion, suppresses harmful bacteria, and helps with oral and intestinal health.
✅ Why it matters: It’s a strong anti-inflammatory strain, often associated with reducing discomfort in people with gut inflammation.
9) Lactobacillus casei
Works well alongside other strains to regulate the digestive system.
✅ Benefits: Helps improve digestion, especially of dairy, supports immune health, and reduces GI inflammation.
✅ Why it matters: Often used to relieve constipation and reduce antibiotic-related diarrhea.
10) Bifidobacterium breve
An important strain in infants that continues to support adult gut health.
✅ Benefits: Breaks down fiber, supports digestion, and inhibits gas-producing bacteria.
✅ Why it matters: Especially effective at modulating gut inflammation and boosting the immune system in the colon.
11) Lactobacillus plantarum
One of the most versatile and resilient strains.
✅ Benefits: Helps seal the gut lining (reducing leaky gut), regulates inflammation, supports nutrient absorption, and boosts antioxidant activity.
✅ Why it matters: It adapts well to different environments and is particularly effective for people with food sensitivities and digestive issues.
It’s your body. It’s your life. Ingredients matter.
Featured Products in This Article:
Dr. Tennant’s® Probiotic Formula provides a biological synergy with “good bacteria” (probiotics), “food for the probiotics” (prebiotics) and a protective, delayed-release delivery technology to maximize probiotic effectiveness and support a healthier GI system.