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CFU on Probiotic Labels: Why Manufacture Date vs Expiry Matters

Quick answer

CFU on probiotic labels means colony-forming units, a count of live, viable cells. A count taken at manufacture can overstate what is left at expiry, so the NIH advises looking for CFU at the end of shelf life. Finessa's tub says 3 Billion CFU and its panel says 5 Billion at manufacture.

Written by the Finessa label deskUpdated October 18, 2026 · 4 min read

An illustration of probiotic bacteria in blue tones — A brand illustration of probiotic bacteria. It is artwork, not a microscope image or a lab sample.

The term01

What does CFU on probiotic labels mean?

CFU stands for colony-forming units. It counts the viable cells in a product, meaning the cells that are alive (NIH ODS, Probiotics fact sheet (CFU, label)).

Federal label rules only require a company to list the total weight of the microbes. That weight has no relationship to the number of living cells, so CFU is added voluntarily (NIH ODS, Probiotics fact sheet (CFU, label)).

The date02

Is CFU at manufacture the same as CFU at expiry?

No. Probiotic microbes can die while a product sits on a shelf, so the count at expiry may be lower (NIH ODS, Probiotics fact sheet (CFU, label)).

The ODS tells shoppers to look for CFU at the end of the product's shelf life. ISAPP likewise advises avoiding products that list CFU only at the time of manufacture (NIH ODS, Probiotics fact sheet (CFU, label)).

Three ways a CFU number can be stated.
Stated as	What it tells you
At manufacture	Cells when made; may fall later
At expiry	Cells promised through shelf life
Weight in mg only	Nothing about live cells

On Finessa03

What CFU does Finessa print?

It prints two different numbers. The tub front says "3 Billion CFU" and the panel says 5 Billion CFU at the time of manufacture.

The panel also gives the blend as a weight, 52.5 mg. We do not know which number is off. Ask for the lot's certificate of analysis, and trust the tub you receive. Seller lot codes are references, not lab proof.

Silymarin
36% of the low end

One scoop90 mg at most
Silymarin per dose in milk thistle products250-750 mg
Comparison source: (NCCIH, Milk thistle)
Artichoke extract
28% of the low end

One scoop112 mg at most
Daily dry leaf extract in an EU monograph400-1,320 mg
Comparison source: (EMA, Artichoke leaf (Cynara) herbal monograph)
Turmeric
45% of the low end

One scoop225 mg of powder at most
Daily turmeric in liver-injury reports500-1,000 mg
Comparison source: (LiverTox, Turmeric)
Probiotic count
Inside the studied range

One scoop5 billion on the panel (3 on the tub)
Daily doses of one strain in a bowel trial1-10 billion CFU
Comparison source: (Eskesen 2015, BB-12 doses and defecation frequency)

Blue bars: the most one scoop can hold of that ingredient, from the label-order arithmetic. Gold bars: daily amounts used in research. The label hides single amounts inside each blend, so the scoop figures are ceilings, not measured amounts. This is our arithmetic, not a lab test. Research amounts are for the whole herb or standardized extract named, and may differ from the form in the powder.

Finessa: from $39 a bottle50 scoops a tub · 1, 3 or 6 bottles · free US shipping on 6 · 180-day guarantee

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More is better?04

Is a higher CFU count always better?

No. Products with higher counts are not necessarily more effective (NIH ODS, Probiotics fact sheet (CFU, label)).

One strain trial gave 1 billion or 10 billion CFU a day of B. lactis BB-12 and saw similar effects at both doses, suggesting a ceiling at the lower dose (Eskesen 2015, BB-12 doses and defecation frequency). The result belongs to that strain, not to a blend. Keep taking prescribed medicine, and see a doctor if bowel symptoms continue.

Decide05

How should you read a probiotic label?

Look for strain names, a CFU count through expiry, and a lot-level test report.

Use the Supplement Facts guide to check the numbers on any tub.

Want to try Finessa? Six bottles ship free in the US, and every pack carries the 180-day guarantee.

3 bottles$147$49 a bottle · 90 days · + shippingGet 3 bottles

6 bottles$234$39 a bottle · 180 days · Free US shippingGet 6 bottles

Prices on the sales page, October 18, 2026 (Finessa sales page). Check your medicines with your doctor first.

FAQ06

Questions about CFU counts

What is a good CFU number for a probiotic?

There is no single good number. Trials state doses per strain, such as 1 and 10 billion CFU a day for BB-12 (Eskesen 2015, BB-12 doses and defecation frequency), and higher counts are not necessarily more effective (NIH ODS, Probiotics fact sheet (CFU, label)).

Can a probiotic label be wrong?

Yes. Some products have been reported to contain microorganisms other than those on the label, and labels may not match the strains inside (NCCIH, Probiotics: usefulness and safety) (NIH ODS, Probiotics fact sheet (CFU, label)).

Does weight in mg show live cells?

No. The ODS says the required weight has no relationship to the number of viable microorganisms (NIH ODS, Probiotics fact sheet (CFU, label)). A 52.5 mg blend therefore cannot tell you the CFU.

Who wrote this07

Written and reviewed by

Written byThe Finessa label deskGofinessa, U.S. stocking partner for Finessa

Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.

Medically reviewed byDr. Maureen Leonard, MD, MMScRole: Medical reviewerReview date: October 19, 2026

Last updated October 18, 2026. Read our editorial standards and how we check reviews. This website is run by Gofinessa, a U.S. stocking partner for Finessa, not by the manufacturer. We earn money when you buy through our order links.

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