BloomWellA proprietary blend legally hides per-herb doses, not the herb list or the maker. Judge the price on cost per cup, published evidence, and what you can still verify.
A proprietary blend is a legal labeling format, not a marketing trick invented by one brand. Under US supplement labeling rules, a maker must print every herb in the blend and the blend's total weight, in descending order by weight. It does not have to print how many milligrams of each herb are inside.
The Council for Responsible Nutrition states it plainly: the quantities of each dietary ingredient in the blend are not required to be disclosed on the label. The stated reason is trade secret protection. A formula that took work to balance can be copied in a week once the exact ratios are public.
Not by itself. In a 2026 comparison of six slimming teas, Sip Lab found that five of the six used proprietary blends. When a format is that common, it stops being a signal about any one product. It only tells you the category defaults to protected formulas.
The honest reading is narrower. A blend hides the dose, so it also hides whether a headline herb is present at a meaningful amount or as a pinch for the label. That is the actual risk, and it is why the industry's own guidance says a claim should be backed by the substantiated quantity.
Read it as a question, not a verdict. A protected formula plus an open supply chain is a defensible product. A protected formula plus no traceable maker, no lot number, and no named tester is the combination worth walking away from, whatever the price per box says.
Price is the part you can compare even when doses are hidden. Sip Lab's 2026 comparison put cost per serving between $0.44 and $2.50 across six products, a spread of more than five times. Same shelf, same promise, wildly different math per cup.
“A blend can legally protect its ratios. It cannot legally hide the manufacturer, and a maker who is hard to find has failed a test that has nothing to do with the formula.”
That spread is not automatically about quality. ConsumerLab has long reported that some of the best-scoring products are not the most expensive, and that some premium-priced supplements fail testing outright. Price is a weak proxy for what is in the cup.
Do the per-serving math yourself before comparing brands. Divide the box price by the number of cups, not by the number of bags or the number of days. A tea taken three times daily burns through a box three times faster than one taken at night.
It also helps to size the effect honestly. A systematic review and meta-analysis in The American Journal of Clinical Nutrition pooled 15 randomized trials covering 1,243 participants to measure what green tea catechins do to body measurements.
The pooled result was a body weight difference of 1.38 kg for catechins with caffeine compared with caffeine alone, and 0.44 kg against a caffeine-free control. The authors, Phung and colleagues, called the clinical significance modest at best. That is a real finding, and a small one.
"Pooling 15 randomized trials in 1,243 participants, green tea catechins taken with caffeine were associated with a body weight difference of 1.38 kg versus caffeine alone, a reduction the authors described as modest at best."
Hold that number next to any price. A blend priced as a transformation is being sold above what the published evidence on this ingredient class supports. A blend priced as a daily ritual you enjoy is being sold at roughly what it is. The claim, not the secrecy, is where overpaying starts.
Plenty, and none of it requires the maker to reveal the recipe. ConsumerLab's guidance on avoiding counterfeit supplements is the practical checklist here: buy from the brand's own site or its listed retailers, since marketplace seller names do not always match the real business behind them.
Then check three things on the box itself. A readable lot number that customer service can confirm. A named third-party tester, such as ConsumerLab, USP, or NSF, rather than an unattributed "quality tested" stamp. Labels with misspellings or odd phrasing, ConsumerLab notes, often signal a counterfeit.
None of that tells you the milligrams. All of it tells you whether a real, reachable company stands behind the box. That is the verification a proprietary blend cannot block, and it separates a protected formula from an anonymous one far better than the ingredient panel does.
All Day Slimming Tea is one of the products readers ask about in this category. It is a third-party maker's product, and BloomWell did not create it and makes no health claims about it. Every claim about what it does belongs entirely to the maker.
What we can point to is what the maker publishes. The maker describes it as a recipe inspired by Nicoya, Costa Rica, suggested three times daily, and offers a 60-day money-back window. That guarantee is the maker's own term, and it is the return path if the tea is not for you.
Apply the same checklist you would to any box in the aisle. Read the maker's ingredient page, run the per-serving math against your own routine, and note the return window before you commit. Read the maker's own explanation and judge the terms with clear eyes.
Some situations make the price question irrelevant. If you take prescription medication, are pregnant or nursing, or have a diagnosed digestive condition, talk with your doctor before adding any herbal tea, whether its doses are printed or protected.
Skip any product that will not tell you who makes it or where to reach them. A blend can legally protect its ratios. It cannot legally hide the manufacturer, and a maker who is hard to find has failed a test that has nothing to do with the formula.
Free to read · The maker's claims and terms are on their official page
The tea is not medicine and no editorial page is a substitute for your own doctor. If your reason for buying is a symptom that worries you rather than a ritual you want, that is a conversation for a clinician first, not a purchase decision.
A proprietary blend is not proof of a scam, and it is not proof of quality either. It is a legal format that trades one kind of transparency for formula protection, and it leaves you with a smaller but still useful set of things to check.
Worth the price is a math question you can answer. Price per cup against your actual routine, effect size the research supports, and a maker you can reach with a lot number in hand. If those three line up, the hidden milligrams are a trade you made knowingly.
Five of six slimming teas compared in 2026 used proprietary blends, so hidden dosing is the category default rather than a signal about any single brand. [1]
Labels must list every herb and the blend total, never each dose.
Serving cost ranged from $0.44 to $2.50 across six compared teas.
Maker, lot number, named tester, and return window stay checkable.
| Label item | Disclosed? | What to do |
|---|---|---|
| Herb listCamellia sinensis | Yes, by common name | Check for a plant part listed |
| Blend total weight | Yes, one figure | Compare totals across brands |
| Dose per herb | No, not required | Weigh claims against evidence |
| Third-party tester | Only if named | Require ConsumerLab, USP, NSF |
| Lot number | Yes, on the box | Call and confirm the lot |
Not necessarily. The label legally hides per-herb amounts, so a low dose is possible but not proven. Industry guidance says any claim should match the substantiated quantity of that ingredient.
Price is a weak proxy. ConsumerLab reports that some best-scoring products are not the priciest, and some premium supplements fail testing. Compare cost per serving instead of cost per box.
A meta-analysis of 15 trials in The American Journal of Clinical Nutrition found a 1.38 kg difference for catechins with caffeine, which the authors called modest at best.
The maker, the lot number, the named third-party tester, and the return window. ConsumerLab advises buying from the brand's own site or its listed retailers to avoid counterfeits.
No. BloomWell is an editorial brand, not a medical provider. Nothing here diagnoses, treats, cures, or prevents any condition. Talk with your own doctor about health concerns.
Readers who run the per-cup math tend to check the maker's multi-box pricing before deciding.
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