GlucoBerry Review: Doses Checked Against the Studies

Is GlucoBerry worth it?

Worth a look (6.3/10). GlucoBerry stands out from most ClickBank blood sugar supplements because its label states an exact amount for all four active ingredients instead of hiding them in a proprietary blend, and one of them, 180 mg of Delphinol maqui berry extract, matches the dose used in a small three-month clinical trial almost exactly. The catch is the sales pitch itself: the vivid 'Blood Sugar Drain' and clogging-protein narrative is a marketing simplification of real but narrower kidney and glucose research, dressed up with an invented-sounding mechanism. The underlying ingredients (chromium, biotin, gymnema, maqui berry) have genuine, if modest, research behind them for blood sugar support, at doses that are reasonable rather than symbolic. At $59 to $69 a bottle with a genuinely long 180-day refund window, this is a middle-of-the-road buy: better dosed than most competitors, but still not a treatment for diabetes or a verified cure for anything.

What we liked

All four ingredients listed with specific amounts, no hidden proprietary blend
Maqui berry dose (180 mg) matches the human clinical trial referenced
Chromium and Gymnema doses fall within ranges used in published research
180-day, no-partial-refund-required guarantee, unusually long for the category
Stated as a one-time purchase with no subscription

What we didn't

No clinical trial of the finished GlucoBerry product itself
"Blood Sugar Drain" framing oversimplifies and dramatizes the underlying kidney research
No single-bottle purchase option; minimum order is $138
One cited study group size (58 people, Gymnema) could not be independently verified
Shipping fee for the 2- and 3-bottle bundles is shown inconsistently on the page

What is GlucoBerry?

GlucoBerry is a once-daily capsule supplement from a company called MD/Process, presented by a person identified as 'Dr. Mark Weis, MD.' The sales page frames its main idea around a 'Blood Sugar Drain' in the kidneys that it says can get clogged by a 'sticky gray protein,' preventing excess sugar from being flushed into urine. A 30-capsule bottle lasts 30 days at the recommended one-capsule dose.

The formula centers on Delphinol brand maqui berry extract, alongside chromium picolinate, biotin, and Gymnema sylvestre leaf powder. The page cites Johns Hopkins and Harvard-linked research on the general kidney mechanism, and separate studies on the individual ingredients, though no clinical trial of the finished GlucoBerry product itself is presented.

It is sold through ClickBank as a one-time purchase with no subscription, according to the sales page, which also lists a company address in Atlanta, Georgia.

Format: Capsule, 30 per bottle, 1 a day with food. Sold by: MD/Process (sold through ClickBank).

What is on the GlucoBerry label?

Each row compares what the label or sales page states with what published research used. When an amount is missing, there is nothing to compare, and we say so.

IngredientPer servingWhat research used

Maqui Berry (Aristotelia chilensis) extractIn studied range180 mgA 2016 trial used 180 mg of Delphinol maqui berry extract daily for 3 months in 31 prediabetic adultsThis is an exact match to the dose used in the cited clinical trial, which found a modest reduction in HbA1c over three months. The trial was small and not fully placebo-controlled in its published design.

Chromium (as chromium picolinate)In studied range600 mcgChromium trials for blood sugar support commonly use 200 to 1,000 mcg per dayA reasonable, well-precedented dose, though chromium's effect size in people without a diagnosed deficiency is generally small.

Gymnema sylvestre leaf powderIn studied range400 mgPublished trials on Gymnema sylvestre for glycemic control have used doses from roughly 300 mg to 600 mg or more per dayThe page claims this matches a specific 58-person study; we could not independently locate that exact trial, but the dose falls within the range used in other published Gymnema research.

BiotinIn studied range2 mg (2,000 mcg, 6,667% DV)Far above the standard adult daily value of 30 mcg; typically paired with chromium in insulin-sensitivity research at similar milligram-range dosesA large multiple of the basic daily requirement, but biotin has a wide margin of safety at oral doses used in supplements; high biotin intake can interfere with some lab tests, which is worth knowing before routine bloodwork.

GlucoBerry's label lists a specific amount for every one of its four ingredients rather than a hidden proprietary blend, and its maqui berry dose lines up with the human trial the marketing leans on. That is better than most ClickBank blood sugar formulas, though the label doses are still short of proving the finished product treats or prevents any blood sugar condition.

Do the GlucoBerry claims hold up?

"Support healthy blood sugar... using the latest Ivy League research" via unclogging a 'Blood Sugar Drain'

Kidney handling of glucose and a protein linked to it is a real area of physiology research, but the vivid 'clogged drain' language is a marketing simplification. No study of the GlucoBerry product itself measuring this mechanism in humans is cited.

Maqui Berry extract improved 'long-term blood sugar markers by 23%'

This appears to reference the cited 2016 trial, which reported an HbA1c drop from about 5.65% to 5.35% over three months in prediabetic adults, a real but modest relative change; the 90-day trial had 31 participants and was not described as double-blind placebo-controlled in the abstract we reviewed.

Gymnema Leaf dosed to match a study of '58 men and women' measuring Hemoglobin A1C

We located other published Gymnema sylvestre trials showing A1C benefits at doses in a similar range, but could not independently verify the specific 58-person study referenced on the page.

"This is a one-time payment. There's no subscription. No hidden fees."

The sales page bundle boxes do state one-time totals rather than recurring charges, consistent with this claim, though ClickBank checkouts can still present separate one-time upsell offers before the order finishes.

How much does GlucoBerry really cost?

Option	Total	Per month	Shipping
2 bottles	$138	$69	$9.95 to $19.95 USA shipping
3 bottles	$177	$59	$9.95 to $19.95 USA shipping
6 bottles	$234	$39	Free USA shipping

There is no single-bottle option. The cheapest package is 2 bottles for $138 total ($69/bottle, a 60-day supply) plus a shipping fee shown inconsistently as either $9.95 or $19.95. The 3-bottle package is $177 total ($59/bottle, 90 days) with the same shipping charge, and the 6-bottle package is $234 total ($39/bottle, 180 days) with free US shipping.

Because there is no 1-bottle option, trying GlucoBerry costs at least $138 up front, more than many single-bottle ClickBank supplements, though the per-bottle price drops sharply if you buy the 6-pack.

At $39 to $69 a bottle for a 30-day supply, GlucoBerry sits in the middle of the price range for blood sugar supplements sold through ClickBank, and its 180-day refund reduces the practical risk of buying more up front.

The 2- and 3-bottle packages carry a stated $9.95 to $19.95 US shipping charge (the page shows both figures inconsistently); the 6-bottle package ships free in the US.

Can you get a refund on GlucoBerry?

180-day window. The sales page offers a 180-day 'empty bottle' guarantee, stating the refund applies even if you have used the entire supply. It directs you to contact support, with details on the packaging, rather than through ClickBank directly, though ClickBank is the retailer of record.

Step by step: find the ClickBank receipt email, look up the order at clkbank.com and ask for a refund in writing. Our ClickBank refund guide covers returns, extra offers and auto-ship.

Which red flags did we find?

"Blood Sugar Drain" is a marketing metaphorThe kidney/glucose research referenced is real in a general sense, but the specific 'clogged drain' story is not a term used in the cited science; it is a simplified narrative built around it.
No trial of the finished productEach ingredient has some individual research behind it, but there is no published clinical trial of the GlucoBerry capsule itself.
Unverified 58-person Gymnema studyThe page references a specific study group size for its Gymnema dosing claim that we could not independently confirm on PubMed.
Inconsistent shipping fee shown on pageThe sales page displays both '$9.95 USA Shipping' and '+$19.95 Shipping' for the same 2- and 3-bottle bundles without clarifying which applies.
Physician endorser without a verifiable practice listed'Dr. Mark Weis, MD' signs the sales letter, but no medical license, specialty, or affiliated practice is named or linkable on the page.

Who should buy GlucoBerry, and who should skip it?

It may suit you if

You want a blood sugar supplement with individually labeled ingredient amounts instead of a hidden blend, and one dose (maqui berry) that matches a real published trial.
You are comfortable with the higher up-front cost of the smallest package and want a long refund window to test it properly.

Skip it if

You have diagnosed diabetes or prediabetes requiring monitoring; this supplement is not a substitute for medical management or prescribed medication.
You want a single-bottle trial size; GlucoBerry's cheapest option is a 2-bottle, $138 package.
You are put off by an unverifiable named endorser or a marketing metaphor standing in for a mechanism study.

How we assessed this

We did not buy or use GlucoBerry. This review audits the offer as it appeared on September 28, 2026. We read:

The GlucoBerry sales page (bloodsugarberry.com/cb) reached through our ClickBank link
The Supplement Facts label image shown on the sales page, listing all four active ingredients and amounts
The pricing, shipping and guarantee sections of the sales page
The FAQ section covering safety, dosing and the refund process
Alvarado et al. 2016, Delphinol maqui berry extract trial in prediabetic adults (PubMed), and a 2021 randomized trial of Gymnema sylvestre in impaired glucose tolerance (PubMed)

Sources

Scores: evidence 5, price 5.5, refund 8, transparency 6.5. How we score.

GlucoBerry FAQ

Is GlucoBerry legit or a scam?

It is a real supplement sold through ClickBank with a fully itemized label and a 180-day refund, so it is not a scam in the sense of taking money for nothing. The marketing narrative around a 'clogged Blood Sugar Drain' is a dramatized simplification of real but more limited kidney and glucose research.

How much does GlucoBerry cost?

There is no single-bottle option. Two bottles cost $138, three bottles cost $177, and six bottles cost $234, working out to $69, $59 and $39 per bottle. Shipping is charged on the smaller bundles and free on the 6-bottle package.

Does GlucoBerry actually work for blood sugar?

Its maqui berry dose matches a small published trial that found a modest HbA1c improvement over three months in prediabetic adults, and its chromium and Gymnema doses fall within ranges used in other studies. There is no published trial of the finished GlucoBerry capsule itself, so treat the claims as plausible but unproven for this exact product.

How do I get a GlucoBerry refund?

The sales page describes a 180-day guarantee, refundable even if you used the entire supply, by contacting the support details printed on the packaging. Since ClickBank is the retailer, you can also start the process through your ClickBank order receipt.

What is in GlucoBerry?

Each capsule contains 180 mg of Delphinol maqui berry extract, 600 mcg of chromium picolinate, 400 mg of Gymnema sylvestre leaf powder and 2 mg of biotin, taken once daily with food.

GlucoBerry review