Find the supplement facts panel before you watch anything. Check whether every active has a number next to it. Compare those numbers to the doses in the research. Count how many ingredients are actually about glucose. Then check that the refund window is longer than the supply you're being sold — because it very often isn't.
1. Find the supplement facts panel first
Before the video, before the testimonials, before the founder's story about a doctor in a remote village. Scroll to the bottom of the page and find the actual label image.
Two things to notice. Is it there at all? A company that won't publish its own label has told you something important. And does what it says match the marketing? Sales pages routinely emphasise an ingredient that turns out to be a minor component of a blend.
Do this first for a practical reason: once you've watched a well-made sales video, you'll read the label more charitably. Order matters.
2. Does every active have a number next to it?
This is the single highest-value check on the list.
A proper label gives each active ingredient an amount — “Chromium 1 mg,” “Gymnema leaf 400 mg.” A proprietary blend instead gives one total for a group: “Proprietary Blend 525 mg” followed by seven ingredient names in no stated proportion.
Blends are legal and they're not automatically sinister — protecting a genuine formula is a real reason. But the practical consequence for you never changes: you cannot compare the product to the studies its own marketing cites, because the number those studies turn on is the number you weren't given.
3. Compare the disclosed doses to the research
Where doses are disclosed, use them. This is where a serious formula visibly separates from a decorative one.
- Chromium at 200 mcg is a box being ticked so the word can appear on the label. At 1 mg it's closer to the trials.
- Vitamin D3 at 2,000 IU is a normal supplemental dose. At 400 IU it's decoration.
Minerals and vitamins are nearly always disclosed individually, which makes them the easiest honest signal on any label — you can judge a company's seriousness from the ingredients it can't hide.
4. Count the ingredients that are actually about glucose
Go through the list and sort it into two piles: ingredients with a glucose rationale, and ingredients that make you feel something.
Gymnema, chromium, cinnamon, L-arabinose, berberine — glucose pile. Guarana, theacrine, theobromine, eleuthero, maca, ginseng, green tea extract — stimulant and adaptogen pile.
The second pile isn't fraudulent, and it does something: you'll feel more energetic. But feeling more energetic is a very effective substitute for a result you can't perceive, and formulas are built with that in mind. If the stimulant pile is bigger, you're buying an energy product with a blood sugar name.
5. Check the refund window against the supply
This one is nearly universal in the category and almost nobody points it out.
The biggest package is always the best value per bottle — and it's usually a supply that lasts far longer than the refund period. A six-bottle, 180-day supply against a 60-day guarantee means you must decide whether it's working while you still hold four months of product you can no longer return.
The package that lines up with the guarantee is almost always the three-bottle one. It costs more per bottle. It also lets you make the decision with evidence and get your money back, which is worth more than the discount.
6. Do the arithmetic on the packages — including shipping
Add shipping before comparing. It changes the answer more often than you'd expect, and occasionally it inverts it completely.
A real example, from a product I've reviewed in full: the two-bottle package is $138 plus $9.95 shipping, so $147.95. The three-bottle package is $147.00 with free shipping and two bonuses. The smaller package costs more for less. It exists to make the next one look generous — a decoy, and a legal one.
Whenever you see three tiers, check whether the cheapest is genuinely an option or just scenery.
7. Treat the urgency furniture as furniture
Countdown timers reset when you reload. “Only 7 bottles left” is a number in a template. “96% of customers choose the 6-bottle package” is a claim with no source that exists to push you to the largest order.
None of this tells you anything about the product. What it tells you is how the company would prefer you to decide — quickly, and without doing points 1 through 6. That's worth knowing on its own.
The honest test: close the tab and come back tomorrow. The price will be the same. If something genuinely expires, you've lost a discount on a product you weren't sure about, which is not a loss.
8. Check the company still exists
This is the check I added after finding something I didn't expect.
Supplement brands in this category are frequently marketing operations rather than long-lived companies. When the advertising spend stops, the brand goes quiet — but the name keeps ranking in search results, and other sellers start listing products under it.
While researching a comparison for this site I went to check GlucoTrust's official label and found that glucotrust.com is parked and listed for sale on a domain marketplace, with third-party products now sold on Amazon under variations of the brand name. Anyone searching that brand today and buying whatever ranks is buying from someone unconnected to the original product, with no original refund policy behind it.
So: visit the official domain, confirm it's a real store and not a parking page, and check who the retailer of record is. If a payment processor like ClickBank or BuyGoods handles the sale, your refund goes through an organisation that processes refunds at volume — which is generally better for you than relying on the supplement company itself.
| # | Check | Fails if |
|---|---|---|
| 1 | Label published and matches the marketing | No label image anywhere on the site |
| 2 | Every active has an individual amount | “Proprietary blend” covering the ingredients that matter |
| 3 | Disclosed doses match trial doses | Chromium at 200 mcg; vitamins at token levels |
| 4 | Most ingredients target glucose | Stimulants and adaptogens outnumber them |
| 5 | Refund window ≥ supply length | 180-day supply, 60-day guarantee |
| 6 | Package maths checked with shipping | A tier that costs more for less |
| 7 | No decision made under a timer | You're rushing |
| 8 | Official site live; retailer identified | Parked domain; third-party marketplace listings only |
The check that outranks all eight. If you take metformin, insulin, a sulfonylurea or any glucose-lowering medication, none of the above is the first question. Talk to your prescriber first — these ingredients are on the label because they may lower glucose, and stacking them on medication that already does can push you too low.
The checklist, applied
My Gluco6 review is this list run against a real product — label first, blend arithmetic, stimulant count, package maths including shipping, and the refund window measured against each supply size. It passes some points and fails others, and the review says which.
Disclosure: that review contains affiliate links. It scores the product 3.4 out of 5 and 2 out of 5 on dose transparency — point 2 is the one it fails.
Medical disclaimer. General information written by a layperson, not medical advice. Dietary supplements are not intended to diagnose, treat, cure or prevent any disease, including diabetes. Prices and product details cited were checked on 29 August 2026 and change without notice — always confirm on the seller's own checkout page.