Standing in front of the probiotic shelf, CFU counts ranging from 1 billion to 100 billion, wondering if more is actually better — or just a bigger number on the label? It's a fair question, and the honest answer is: it depends on what you're looking for.
This guide breaks down what CFU count actually means, when a higher-potency formula like Probiotic 40 Billion CFU makes sense, and how delivery technology matters just as much as the number on the front of the bottle.
What Does CFU Count Actually Mean?
CFU stands for colony-forming units — essentially, the number of live bacteria in a serving that are capable of multiplying. A higher CFU count means more bacteria are present at the time of manufacturing, but it doesn't automatically mean more reach your gut alive. Stomach acid destroys a significant portion of probiotics before they ever reach the intestines, which is why delivery technology matters as much as the raw number.
How a High-Potency Probiotic Works
Attain's 40 Billion CFU formula combines four researched strains — Lactobacillus Acidophilus, Bifidobacterium Lactis, Lactobacillus Plantarum, and Lactobacillus Paracasei — with MAKTREK® Bi-Pass Technology, a proprietary marine polysaccharide delivery system designed to help protect probiotics as they pass through stomach acid. The formula also includes fructooligosaccharides, a prebiotic fiber that feeds beneficial bacteria once they arrive, helping them establish rather than just pass through.
The combination matters: a high CFU count without protected delivery may lose much of its potency to stomach acid, while protected delivery with a low CFU count may not provide enough bacteria to make a noticeable difference. This formula is built to address both sides of that equation.
Key Benefits
1. High-potency support
At 40 billion CFU per serving, this formula sits at the higher end of daily-use probiotics, which can matter for people who haven't found relief with lower-potency products.
2. Protected delivery
MAKTREK® Bi-Pass Technology is designed to help shield probiotic strains from stomach acid, so more of them reach your intestines intact.
3. Multi-strain diversity
Four complementary strains support different aspects of gut balance rather than relying on a single species.
4. Built-in prebiotic support
Fructooligosaccharides nourish the probiotics once they arrive, supporting their ability to establish in your gut.
5. Supports digestive comfort
Many people use a higher-potency probiotic specifically to support more comfortable, regular digestion and reduced everyday bloating.
How to Take a 40 Billion CFU Probiotic
The suggested use is one capsule during the day and one in the evening, for two capsules total — don't exceed two capsules per day. Splitting the dose across the day, rather than taking both at once, is a simple way to give your gut a steadier supply.
Who Should Consider a Higher-CFU Formula?
Not everyone needs 40 billion CFU. If you're new to probiotics or have a sensitive gut, a lower starting dose (like a 20 billion CFU formula, covered in our Probiotic 20 Billion CFU guide) may be the more comfortable entry point. A higher-potency formula tends to make more sense for people who travel frequently, have taken antibiotics recently, or haven't noticed a difference from a lower-CFU product. As with most supplements, starting low and adjusting based on how your body responds is a reasonable approach.
Is It Safe to Take Daily?
For most healthy adults, a daily probiotic in this range is well tolerated, though some people notice mild, temporary digestive adjustment (gas or bloating) in the first few days as their gut flora shifts — this typically settles within a week or two. Pregnant or nursing women, anyone under 18, and people who are immunocompromised or have a serious medical condition should consult a healthcare provider before starting any new probiotic.
Frequently Asked Questions
Is 40 billion CFU too much?
Not for most healthy adults, but individual tolerance varies. If you're new to probiotics, consider starting with a lower-CFU formula and working up if needed.
What is MAKTREK Bi-Pass Technology?
It's a proprietary marine polysaccharide delivery system designed to help protect probiotic strains from stomach acid so more of them reach your intestines alive.
How is this different from the 20 billion CFU formula?
The core difference is potency — 40 billion CFU per serving versus 20 billion — which may suit people who want a higher-strength daily option or haven't seen results from a lower dose.
When should I take my probiotic?
Attain's suggested use is one capsule during the day and one in the evening, with water.
The Bottom Line
More CFU isn't automatically better — but paired with protected delivery and multiple complementary strains, a higher-potency formula like Probiotic 40 Billion CFU can be a smart step up for people who need more digestive support than a standard-strength probiotic provides. As always, consistency and the right fit for your body matter more than chasing the biggest number on the label.
New to probiotics? Start with our gut health probiotics guide and digestive enzymes for bloating article.
*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. Consult your healthcare provider before beginning any new supplement.
