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Dr. Nature Probiotic 40 Billion bottle
40BCFU
40BCFU per serving
4Named strains
+Prebiotic fiber
Daily Gut Formula

Probiotic 40 Billion

40 billion CFU across 4 named, researched strains, with MAKTREK® Bi-Pass delivery to help them get past stomach acid, plus prebiotic fiber to feed them.*

  • 4 named strains: La-14, Bl-04, Lp-115, Lpc-37
  • Bi-Pass delivery built to survive stomach acid*
  • Prebiotic FOS to feed the good bacteria*
  • Regularity & immune support*
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Most popular3 Bottles
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✓ Third-party tested✓ Made in USA✓ cGMP facility✓ Vegan caps
60-Day Money-Back GuaranteeLove how you feel or get 100% of your money back. Nothing to send back.
What it does

Most probiotics list a big number and a blend you can't look up. We list every strain by its research ID: Lactobacillus acidophilus La-14, Bifidobacterium lactis Bl-04, Lactobacillus plantarum Lp-115 and Lactobacillus paracasei Lpc-37.*

MAKTREK® Bi-Pass technology helps the cultures survive stomach acid on the way to your gut, and a prebiotic (FOS) gives them something to feed on when they get there.*

Supplement facts
Proprietary Probiotic Blend (40 Billion CFU)800 mg
  L. acidophilus La-14†
  B. lactis Bl-04†
  L. plantarum Lp-115†
  L. paracasei Lpc-37†
Complex Marine Polysaccharide60 mg
Fructooligosaccharide (FOS)24 mg

† Daily Value not established. Other ingredients: Hypromellose (vegetable capsule), rice maltodextrin, L-leucine.

How to take it

Take 2 capsules daily: 1 in the morning and 1 in the evening. Do not exceed 2 capsules per day.

Shipping & returns

Ships within 1 to 2 business days from the USA. Free shipping on 2+ bottles and every subscription. 60-day money-back guarantee.

Gut feeling "off"?

You're not imagining it, and you're not alone.

Some days are regular, most aren't
You catch every bug going around
Your probiotic lists billions but no strain names
You're not sure it even survives your stomach

Why strain names matter

Named strains. Built to make it past your stomach.

A CFU count tells you how many. A strain ID tells you which ones, and lets you look up the research. Bi-Pass delivery is about how many arrive alive.*

40 BillionCFU per 2 capsules
4 strainsIdentified by strain ID
Bi-PassMAKTREK® delivery tech
30 days60 capsules per bottle

Your first 30 days

Everyone's different. Here's how most people build the habit.*

Week 1

Settling in

Take one capsule morning and evening. Some people notice changes in digestion as their gut adjusts.*

Weeks 2–4

Rhythm

Consistency matters more than anything with probiotics. Keep taking it daily.*

Day 30+

Full routine

Pair with Enzymes at meals for the complete 3-Step Gut Routine.*

Complete your routine

Probiotic 40 Billion is Step 2: rebalance. Add the other two steps.

Step 1 · Break it down

Digestive Enzymes

Lighter after every meal* · $39.95

Step 3 · Energize

Organic Beetroot

Circulation + stamina* · $34.95

Frequently asked

Straight answers, no fine print.

When do I take it?
One capsule in the morning and one in the evening, every day.
Do I need to refrigerate it?
Store in a cool, dry place. We're confirming shelf-stability details with our manufacturer before we print a 'no refrigeration' claim.
Can I take it with Enzymes?
Yes. Enzymes help break food down at meals (Step 1); the probiotic helps rebalance (Step 2).
Why are strain IDs important?
They're how researchers identify a specific culture. Two products can both say 'L. acidophilus' and contain very different strains.
What if it doesn't work for me?
Email us within 60 days and we'll refund your order. Nothing to send back.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.