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Proprietary Blend Supplement Labels: What You Can Work Out and What You Cannot
A proprietary blend supplement shows one total weight for a group of ingredients and hides each share. The ingredients must still run from heaviest to lightest. On FemiPro, 350 mg herbal and 50 mg probiotic blends let you work out ceilings, such as 175 mg for cranberry, but never the true amounts.
Written by the FemiPro label deskUpdated · 4 min read
The rule01
What is a proprietary blend on a supplement label?
A proprietary blend is a group of ingredients listed under one name with one combined weight. The name can be "Proprietary Blend" or a descriptive one the maker chooses.
Federal labeling rules say the ingredients under the blend go in descending order of predominance by weight, and the number on the blend line is the total of all of them. The weight of each single ingredient need not be shown (21 CFR 101.36, supplement labeling).
Think of a fruit salad sold by the bowl. The bowl weighs 350 grams, the first fruit listed is the heaviest, and you cannot tell if grapes make up most of it or only a handful. A blend line works the same way.
So a blend is legal and common. It is simply a label that asks for trust where a full label would offer numbers.
Using the order02
How does the weight order help you read a blend?
The weight order gives each ingredient a ceiling. Line k of a blend can weigh at most the total divided by k, because every line above it weighs at least as much.
Take the 350 mg herbal blend. Line one, mimosa pudica seed extract, could weigh up to 350 mg. Line two, cranberry extract, at most 175 mg. Line three, bearberry leaf, at most 116.7 mg. Line four, berberine extract, at most 87.5 mg.
| Blend line | Position | Most it could weigh |
|---|---|---|
| Mimosa pudica seed extract | 1 of 4 | 350 mg |
| Cranberry extract | 2 of 4 | 175 mg |
| Bearberry leaf | 3 of 4 | 116.7 mg |
| Berberine extract | 4 of 4 | 87.5 mg |
These are upper limits, not amounts. The real weights may be much lower.
Seeing the split03
How is one FemiPro capsule divided between its blends?
One FemiPro capsule lists 400 mg of blend: 350 mg herbal plus 50 mg probiotic. The capsule shell and other ingredients, such as brown rice flour and magnesium stearate, sit outside that total.
The probiotic side works the same way. Five strains share 50 mg, so the ceilings run 50, 25, 16.7, 12.5 and 10 mg, and the average is 10 mg. No CFU count is printed.
Herbal blend ceilings
- 1Mimosa pudica seed extract≤ 350 mg
- 2Cranberry extract (30% PAC)≤ 175 mg
- 3Bearberry leaf (uva-ursi)≤ 116.7 mg
- 4Berberine hydrochloride extract 8%≤ 87.5 mg
Probiotic strain ceilings
- 1Lactobacillus crispatus LCr86≤ 50 mg
- 2Lactobacillus acidophilus LA88≤ 25 mg
- 3Lactobacillus plantarum N13≤ 16.7 mg
- 4Lactobacillus gasseri LG08≤ 12.5 mg
- 5Lactobacillus casei LC16≤ 10 mg
Step 1. The label prints two totals only: 350 mg for the "UTI Herbal Blend" and 50 mg for the "Probiotic Blend".
Step 2. A blend lists its lines from most to least by weight, so line k can weigh at most the total divided by k.
Step 3. So cranberry is at most 175 mg (at most about 52 mg of PACs at 30%), berberine extract at most 87.5 mg, and the five strains average 10 mg with no CFU count.
These are our sums from the label, not lab results. A blend has to list its total and its order, not single amounts (21 CFR 101.36, supplement labeling).
FemiPro: from $49 a bottle30 capsules · 1, 3 or 6 bottles · free US shipping · 60-day money-back guarantee
See packsA name to read twice04
Why is the herbal blend called "UTI Herbal Blend"?
The label calls its herbal group "UTI Herbal Blend", a name the maker chose. A urinary tract infection is an infection, and it needs a clinician and usually antibiotics (CDC, UTI basics). A supplement is not a treatment for one.
The name also sits oddly beside the front claims about bladder control. Cranberry research concerns repeat infections, not leaks (NCCIH, Cranberry). Read the name as marketing, then read the lines under it.
The label also names the second blend "Probiotic Blend", a plain description. That one has no clinical wording, but it still hides the weight of each strain and any CFU count.
If you have burning, urgency or blood in the urine, see a clinician instead of reaching for a capsule.
What a blend hides05
What should you do about a blend you cannot check?
Treat the ceilings as the most you can know, and judge the product by what is checkable: the ingredient list, the directions and the guarantee. Bearberry is one example. European guidance limits it to one week of use (EMA/HMPC, Uvae ursi folium (bearberry leaf)), so the unknown share matters for a daily capsule.
Ask a pharmacist about interactions, because berberine can change how the body handles some medicines (Berberine drug interactions review, 2026). The ingredients page gives every line, and the medicines guide covers the questions to ask. Keep taking any prescribed medicine.
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FAQ06
Blend label questions, answered
Is a proprietary blend a bad sign?
Not by itself. Blends are allowed and widely used. The drawback is that you cannot check each dose, so you cannot compare it with amounts used in research. That is a reason for caution, not proof of a problem.
Why do companies hide ingredient amounts?
Some say it protects a recipe. Others use it to avoid showing small doses. The label does not say which applies here, so the honest reading is that the reason is unknown and the amounts are unknown too.
Can I work out the exact amount of each ingredient?
No. The weight order gives only a maximum for each line. The true amount can sit anywhere below it, so ceilings are useful for sanity checks and not for dosing.
Does the blend total include the capsule shell?
No. The 400 mg of listed blend per capsule excludes the gelatin shell and the other ingredients. Those are listed separately as brown rice flour, magnesium stearate, olive oil and silicon dioxide.
Who wrote this07
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a U.S. stocking partner for FemiPro, not by the manufacturer or the label's distributor. We earn money when you buy through our order links.
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U.S. stocking partner for FemiPro
Ready to try FemiPro?
Check your medicines first, then pick a pack. Every pack ships free in the US, six bottles cost the least per bottle, and each order carries the 60-day money-back guarantee.
- Secure checkout
- 60-day money-back guarantee
- Ships from the U.S.