Cardio Shield Review (2026): Six Herbs in One 570 mg Blend, Vitamins Fully Listed

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By Mauro Costa · Updated November 6, 2026 · Prices checked November 6, 2026 · How we review

Cardio Shield is a blood pressure support supplement (two capsules a day) sold on getcardioshield.com through ClickBank and distributed, per its label, by Apollo Research Ltd of London. In this Cardio Shield review the short answer is: the vitamin amounts are on the label, but six herbs share one 570 mg blend with no amount for each.

Cardio Shield at a glance

Form	Vegetable capsules
Daily dose	2 capsules
Servings per bottle	30 (2 capsules a day, 60 capsules)
Price from	$39 per bottle (6-bottle package)
Cost per day	$1.30/day on the 6-bottle package
Money back guarantee	180 days
Recurring billing	None seen (sales page and checkout)
Seller	Apollo Research Ltd, London, UK (label and terms of use)
Made in	Not disclosed
Official domain	getcardioshield.com
Sold through	Official website via ClickBank
Last checked	November 6, 2026

What Is Cardio Shield and Why Is It Trending?

Cardio Shield is a capsule supplement marketed for healthy blood flow and blood pressure. The label calls it “Advanced Blood Pressure Support”: two capsules a day, 60 capsules per bottle, so one bottle lasts 30 days. It is sold on getcardioshield.com, checkout runs through ClickBank, and the label says it is distributed by Apollo Research Ltd in London.

It isn’t a brand-new launch. The site’s footer carries a 2022 copyright, and on ClickBank it sits in the middle of the health category: gravity 9.1, #89 of the 183 health offers in our November 5 snapshot. Gravity roughly reflects how many affiliates earned a commission from a product recently, which also explains the many promotional articles about it that show up in search.

The sales page is a long written letter, not a video. It tells a personal story and then pitches the formula; we went by the written page, the label image and the policy pages. We left out the story and the customer pictures: we can’t verify them.

Cardio Shield Reviews and Complaints: What Buyers Report

We looked for buyer feedback on November 6, 2026 and found none we could check. There is no Trustpilot page for getcardioshield.com, no BBB profile for the product or for Apollo Research Ltd, and a Reddit search turned up no threads about this supplement.

What search does return is a long list of paid press releases, sponsored articles and Google Sites pages. Most carry order buttons, and some describe results or customer stories we couldn’t trace to a real buyer, so we don’t count them as feedback. No feedback isn’t the same as bad feedback: it means you’d be relying on the refund policy rather than on other buyers’ experience.

Reviews and complaints: where we looked

Where we looked	What we found	Checked
Trustpilot	None found. No Trustpilot page exists for getcardioshield.com; the address returned 'not found'.	Nov 6, 2026
BBB	None found. No BBB profile or complaint for Cardio Shield, getcardioshield.com or Apollo Research Ltd in our search.	Nov 6, 2026
Reddit	None found. No Reddit thread about this supplement in a site search; the results were promotional pages on other sites.	Nov 6, 2026
Web search: complaints and refunds	None found. Searches for complaints and refunds returned paid press releases and sponsored articles, none linking to a verifiable buyer complaint.	Nov 6, 2026

We link each page and summarize what we saw. We don’t reproduce buyer reviews or testimonials.

Who Sells Cardio Shield? What We Could Verify

Cardio Shield is a real product sold through ClickBank with a 180-day refund policy, a published refund process and a named UK company behind it. Whether it works is a separate question: we found no published trial of the formula itself.

The terms of use name Apollo Research Ltd with UK company number 14070094. The address isn’t consistent: the label and one section of the terms say 160 City Road, London, while another line of the terms says 128 City Road. Returns don’t go to London: the refund page says support gives you a US return address, and returns sent anywhere else aren’t accepted. ClickBank handles payment and appears on your statement as “CLKBANK*CardioShield”.

What we could verify about Cardio Shield

What we checked	Status	Details
Official domain (where our link lands)	Yes	getcardioshield.com · source
Payment processor	Yes	ClickBank (order buttons go to a ClickBank checkout) · source
Seller or company named	Yes	Apollo Research Ltd (label: 'Distributed by'; terms of use give UK company number 14070094) · source
Physical address	Yes	London, UK: 160 City Road on the label and in the terms; 128 City Road elsewhere in the terms. Returns go to a US address given by support · source
Refund policy page	Yes	180 days, unopened bottles returned at the buyer's cost · source
Recurring billing	No	No subscription or auto-ship on the sales page or the 1-bottle checkout we opened · source
Doses / Supplement Facts shown	Yes	Label image on the References page: vitamin amounts and a 570 mg blend total; no amount for each herb · source
Third-party reviews found	No	No Trustpilot page, BBB profile or Reddit thread; only promotional articles · source
Look-alike 'official site' pages seen in search	Yes	Sponsored articles and Google Sites pages on other domains carry 'Official Site' buttons; they are affiliate pages, not the vendor · source
Listed on Amazon/eBay/Walmart	Not checked	A web search showed no listing, but we didn't search those stores directly

We could check: official domain; payment processor; seller or company named; physical address; refund policy page; recurring billing; doses / Supplement Facts shown; third-party reviews found; look-alike 'official site' pages seen in search. We couldn’t check: listed on Amazon/eBay/Walmart. Checked November 6, 2026.

Checkout is handled by ClickBank, which acts as the retailer for products sold on its platform; refund requests can also go through ClickBank’s customer support.

Pages titled “Official Site” on other domains, such as sponsored news-site articles and Google Sites pages, are affiliate pages, not the vendor. The vendor’s own domain is getcardioshield.com.

Where to Buy Cardio Shield (Amazon, Walmart or the Official Site?)

The official place to buy it is getcardioshield.com, with checkout through ClickBank. We didn’t check Amazon, eBay or Walmart listings directly; a web search on November 6, 2026 showed none. The refund policy covers orders processed through the official checkout, so bottles bought from another seller may not be covered.

Searches for “cardio shield reviews” also bring up The Paw Parent’s “Cardiac Shield” powder for dogs. That is a different product from a different company; this review covers only the human capsule supplement sold on getcardioshield.com.

How Cardio Shield Claims to Work

The sales page says it offers “6 researched-backed ways to support healthy blood flow and healthy blood pressure levels – in record time” and that “each ingredient in this formula works synergistically together to give you astonishing results, fast.” It also says it “usually takes 60 to 90 days to see optimal results.”

Here is how that compares with what we found. The ingredients do have human research on blood pressure, and some of it is decent: olive leaf extract, nattokinase, green tea and hibiscus each had trials or meta-analyses that reported lower readings. But no trial tested Cardio Shield itself, so there is no evidence for “astonishing results, fast” or for the herbs working “synergistically”. The changes in the ingredient studies were mostly a few mmHg over weeks, and we can’t tell whether the capsules contain the amounts those studies used.

The sales page names four ingredients (hawthorn leaf, olive leaf extract, green tea extract and garlic) “and many others”. The Supplement Facts image on the site’s References page lists two more herbs, nattokinase and hibiscus anthocyanins, plus six vitamins. The page’s reference list links mostly to general sources on blood pressure and diet, not to trials of this product.

Cardio Shield Ingredients vs. the Research

We read the Supplement Facts image on the References page of getcardioshield.com on November 6, 2026. A serving is two capsules. The six vitamins have exact amounts; the six herbs share one 570 mg proprietary blend, listed in this order: hawthorn leaf extract, olive leaf extract, nattokinase, green tea extract, garlic extract and hibiscus anthocyanins. Blends are listed from most to least by weight, which lets us give an upper limit for each herb (the 2nd can be at most half of 570 mg, the 3rd a third, and so on), but not the actual amount.

Ingredient	Label dose	Dose in studies	What the research says	Evidence
Hawthorn leaf extract	Not disclosed (listed 1st in the 570 mg blend, so at most 570 mg)	500 mg/day of hawthorn extract for 10 weeks [1]	In a 10-week pilot trial in 36 adults with mild hypertension, blood pressure fell in every group, placebo included, and the groups did not differ overall; the hawthorn group showed only a non-significant trend toward lower resting diastolic pressure [1]. A crossover study of 1,000 to 2,500 mg doses taken twice daily for 3.5 days in 21 prehypertensive or mildly hypertensive adults found no dose effect on blood vessel dilation or blood pressure [2].	Limited
Olive leaf extract	Not disclosed (listed 2nd in the 570 mg blend, so at most 285 mg; no oleuropein content stated)	An extract giving 136 mg oleuropein and 6 mg hydroxytyrosol daily for 6 weeks [3]	In a crossover trial in 60 prehypertensive men, 24-hour systolic pressure was 3.3 mmHg lower after 6 weeks of the extract than after the control [3]. A 2025 trial in 621 adults already treated for hypertension reported a 6.4 mmHg drop in 24-hour systolic pressure from baseline after 12 weeks, with a smaller difference against placebo [4].	Moderate
Nattokinase (seed)	Not disclosed (listed 3rd in the 570 mg blend, so at most 190 mg; no fibrinolytic units stated)	2,000 FU per capsule for 8 weeks (capsules per day not stated in the abstract) [5]	In an 8-week placebo-controlled trial in 86 adults with untreated systolic pressure of 130 to 159 mmHg, systolic pressure fell 5.55 mmHg and diastolic 2.84 mmHg more than with placebo [5]. Nattokinase is dosed by enzyme activity (FU), which the label doesn’t give.	Limited
Green tea extract (leaf; 98% polyphenols, 50% EGCG, under 1% caffeine)	Not disclosed (listed 4th in the 570 mg blend, so at most about 142 mg)	Not stated in the abstract we read	A meta-analysis of 13 randomized trials found systolic pressure 2.08 mmHg and diastolic 1.71 mmHg lower with green tea or its extracts than with control, with larger changes in people whose systolic pressure started at 130 mmHg or more [6].	Moderate
Garlic extract (bulb, standardized to 1% allicin)	Not disclosed (listed 5th in the 570 mg blend, so at most 114 mg)	Aged garlic extract, with significant effects only above 1,200 mg/day [7]	A meta-analysis of 9 trials in 584 adults with hypertension found aged garlic extract lowered systolic pressure by about 4 mmHg on average, with significant effects only at doses over 1,200 mg a day [7]. A review of double-blind trials found the most consistent results with aged garlic extract [8]. Cardio Shield uses an allicin-standardized extract, a different form.	Limited
Hibiscus anthocyanins	Not disclosed (listed 6th in the 570 mg blend, so at most 95 mg)	Not stated in the abstract we read	A meta-analysis of 13 trials (1,205 people with mild to moderate hypertension) found systolic pressure 6.67 mmHg lower than with placebo, and no difference against blood pressure drugs [9]. A 2021 Cochrane review found only one eligible trial and called the evidence insufficient [10]. These trials used hibiscus tea or extract, not isolated anthocyanins.	Limited
Vitamins C, D3, K2 (MK-7), niacin, B6 and B12	Vitamin C 30 mg, vitamin D3 15 mcg, vitamin K2 200 mcg, niacin 20 mg NE, vitamin B6 5 mg, vitamin B12 50 mcg	No human studies reviewed: we did not look up blood pressure trials for these vitamins	We list them for completeness. The label puts them at 33% to 2,083% of the Daily Value. Vitamin K2 is the one that matters most for safety: vitamin K works against warfarin (see the safety section).	Insufficient

What this means for the label vs. the studies: hawthorn could reach the 500 mg used in a pilot trial only if it made up nearly the whole blend, leaving little for the other five herbs. Olive leaf and nattokinase were studied by oleuropein content and enzyme units, which the label doesn’t give. The garlic trials that showed effects used aged garlic extract above 1,200 mg a day, a different form at a much higher amount than the blend allows. For green tea and hibiscus, the abstracts we read didn’t state one dose, so we can’t compare them.

Cardio Shield Side Effects and Who Should Skip It

We found no trial of the finished formula, so nobody has measured its side effects. The label itself says the product is not for pregnant or nursing women, people under 18, or anyone with a known medical condition, including cardiovascular disorders or low blood pressure, and that people on prescription medication, including blood pressure medication, should consult a physician first.

Known interactions to raise with your doctor or pharmacist:

• Blood thinners and antiplatelet drugs (warfarin, apixaban, clopidogrel, daily aspirin): nattokinase is an enzyme that breaks down fibrin and garlic can affect clotting, so together they may raise bleeding risk. The 200 mcg of vitamin K2 per serving matters separately for warfarin, because vitamin K works against it.
• Blood pressure medication: olive leaf, hibiscus, nattokinase and hawthorn were all studied for lowering blood pressure, so adding them to a prescription could push pressure too low.
• Heart medication such as digoxin or beta blockers: hawthorn is traditionally used for the heart and may add to their effects.
• Surgery: because of the bleeding concern, tell your surgeon if you take it.

Green tea extract here is standardized to under 1% caffeine, so it adds very little caffeine. Talk to your doctor before starting it, especially if you are being treated for high blood pressure or a heart condition: a supplement is not a substitute for your medication.

Cardio Shield Price, Packages and Money-Back Guarantee

Prices on the official sales page on November 6, 2026: one bottle $59, three bottles $147 ($49 each) and six bottles $234 ($39 each). Each bottle is a 30-day supply, so the cost per day is $1.97, $1.63 or $1.30. The single bottle adds $19.95 shipping on the sales page, which brings it to about $2.63 a day; the separate shipping page lists free US shipping, and the ClickBank checkout we opened (in our local currency) added a charge in line with the $19.95. The 3- and 6-bottle packages ship free in the US.

The page shows a $99 “retail” price per bottle and says you save $150 on three bottles and $360 on six. The math checks out against that $99 figure, but we couldn’t confirm the product was ever sold at $99. The order page has no coupon field we could see, and there are no bonus items in any package.

The guarantee is 180 days. Buyers keep opened bottles and send back unopened ones (free bottles included) at their own cost, to a US address that support provides. The refund page counts the 180 days from the order date in one place and from receipt in another, so ask early if you’re close to the deadline.

Read the official Cardio Shield sales page and current prices → (paid link)Official website · Checkout by ClickBank · 180-day refund (vendor terms apply)

Pros and Cons

Who Should (and Shouldn't) Consider Cardio Shield

It may suit adults with no diagnosed heart condition and no prescription medication who want a herb-and-vitamin formula for blood pressure support, who accept that the herb amounts aren’t disclosed, and who want a long refund window.

Skip it, or talk to your doctor first, if you take blood thinners, blood pressure or heart medication, if your blood pressure runs low, before surgery, or if you are pregnant, nursing or under 18. If you want to know exactly how much hawthorn or olive leaf you’re taking, a single-ingredient product with the amount on the label will tell you more.

Cardio Shield vs. Alternatives

We don’t rank blood pressure supplements against each other. The useful comparison is with what Cardio Shield contains: olive leaf, hawthorn, garlic, green tea and hibiscus are all sold as single-ingredient supplements, and those labels usually show the amount, and sometimes the oleuropein or allicin content, so you can compare them directly with the studies above. Aged garlic extract, the form most garlic trials used, is also sold on its own. Hibiscus and green tea are also everyday teas.

Diet, salt intake, activity and weight all affect blood pressure, and a home blood pressure monitor is the only way to see whether anything changes for you. If your readings are high, your doctor is the right person to decide what to do about them.

Final Verdict: Is Cardio Shield Worth It?

Cardio Shield is more transparent than many ClickBank formulas: the full Supplement Facts panel is on its own website, the vitamin amounts are listed, and the 180-day refund window is long. Its herbs have human blood pressure research behind them, though much of it is small or modest. The catch is the 570 mg blend: you can’t tell whether any herb reaches the amounts used in those studies, and for garlic the studies used a different form.

At $1.30 to $1.97 a day it costs about as much as buying a couple of single-ingredient products. If you have no medical condition, take no medication and like the long guarantee, it is a reasonable thing to look at. If you take blood thinners or blood pressure medication, start with your doctor, not with a supplement.

Before you click: the official page is a long text sales letter (prices near the bottom) · smallest package: 1 bottle · checkout by ClickBank · no recurring charges, per the sales page · 180-day refund window.

Visit the official Cardio Shield website to compare packages → (paid link)Official website · Checkout by ClickBank · 180-day refund (vendor terms apply)

Cardio Shield FAQ

Does Cardio Shield have side effects?

Nobody has measured them: we found no trial of the finished formula. The label warns people with heart conditions or low blood pressure, pregnant or nursing women and under-18s not to use it. Nattokinase and garlic may raise bleeding risk with blood thinners, and several herbs may add to blood pressure medication. Talk to your doctor first.

Can I take Cardio Shield with blood pressure medication or blood thinners?

Ask your doctor first. The label itself says anyone on prescription medication, including blood pressure drugs, should consult a physician. Olive leaf, hibiscus, nattokinase and hawthorn were studied for lowering blood pressure, nattokinase and garlic may affect clotting, and its 200 mcg of vitamin K2 works against warfarin.

How does the Cardio Shield money-back guarantee work?

You have 180 days to ask for a refund. Contact Cardio Shield support by phone or email, get the US return address, and send back unopened bottles, including free ones, at your own cost; you keep opened bottles. Refunds are issued once the return is received and verified.

Is Cardio Shield a one-time payment or a subscription?

A one-time payment, as far as we could see. The sales page and the ClickBank checkout we opened on November 6, 2026 showed no subscription or auto-ship option. Sellers on ClickBank often show extra offers after payment; we didn’t buy, so we can’t list them, and you can decline them.

Is Cardio Shield sold on Amazon or Walmart?

We didn’t check those stores directly, and a web search on November 6, 2026 showed no listing. The official seller is getcardioshield.com with checkout through ClickBank. The 180-day refund policy covers orders processed through that checkout, so bottles bought elsewhere may not be covered.

Who makes or sells Cardio Shield?

Apollo Research Ltd, a UK company. The label says it is distributed by Apollo Research Ltd in London, and the terms of use give company number 14070094. The terms list two London addresses (160 and 128 City Road), and returns go to a US address that support gives you.

Does Cardio Shield really work?

There is no trial of Cardio Shield itself. Some of its ingredients, mainly olive leaf extract and nattokinase, had trials in adults with raised blood pressure that reported readings a few mmHg lower, but the label doesn’t show how much of each herb the capsules contain.

Sources

1. Walker AF et al. (2002). Promising hypotensive effect of hawthorn extract: a randomized double-blind pilot study of mild, essential hypertension. Phytotherapy research : PTR. PubMed 11807965
2. Asher GN et al. (2012). Effect of hawthorn standardized extract on flow mediated dilation in prehypertensive and mildly hypertensive adults: a randomized, controlled cross-over trial. BMC complementary and alternative medicine. PubMed 22458601
3. Lockyer S et al. (2017). Impact of phenolic-rich olive leaf extract on blood pressure, plasma lipids and inflammatory markers: a randomised controlled trial. European journal of nutrition. PubMed 26951205
4. Lamti F et al. (2025). Efficacy of olive leaf extracts in controlling blood pressure in hypertensive patients: a double-blind randomized clinical trial. Journal of hypertension. PubMed 40990594
5. Kim JY et al. (2008). Effects of nattokinase on blood pressure: a randomized, controlled trial. Hypertension research : official journal of the Japanese Society of Hypertension. PubMed 18971533
6. Khalesi S et al. (2014). Green tea catechins and blood pressure: a systematic review and meta-analysis of randomised controlled trials. European journal of nutrition. PubMed 24861099
7. Saadh MJ et al. (2024). Effects of aged garlic extract on blood pressure in hypertensive patients: A systematic review and meta-analysis of randomized controlled trials. Prostaglandins & other lipid mediators. PubMed 39437887
8. Varshney R et al. (2016). Garlic and Heart Disease. The Journal of nutrition. PubMed 26764327
9. Abdelmonem M et al. (2022). Efficacy of Hibiscus sabdariffa on Reducing Blood Pressure in Patients With Mild-to-Moderate Hypertension: A Systematic Review and Meta-Analysis of Published Randomized Controlled Trials. Journal of cardiovascular pharmacology. PubMed 34694241
10. Pattanittum P et al. (2021). Roselle for hypertension in adults. The Cochrane database of systematic reviews. PubMed 34837382
11. Official website (sales page)
12. Supplement Facts image and references
13. Refund policy
14. Shipping policy
15. Terms of use (seller details)

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not medical advice. Talk to your doctor before starting any supplement, especially if you are pregnant, nursing, take medication, or have a medical condition.