The Unique Red Algae Antioxidant That's
6,000x More Potent Than Vitamin C

Over 1,500 peer-reviewed scientific studies show that this antioxidant offers extraordinarily
powerful protection against the free radicals that can damage your health and make you age faster.

Today more than ever, we need antioxidants to protect our cells from damaging molecules known as free radicals that not only trigger body-wide inflammation but also literally accelerate the aging process.

The toxins, pollution and processed foods that are ever-present in modern life bombard our bodies with free radicals daily, and the older we get, the more critical it becomes to protect our brain, heart, eyes, skin and other critical organs from the cellular harm that free radicals can cause.

In fact, the damage caused by free radicals is one of the most significant factors that perpetuate the array of health issues that bring people into my clinics, desperate for help.

Hello, I'm Dr. Kevin Passero.

Please keep reading because I’m going to tell you how to create a natural "shield" for your body using a unique and groundbreaking antioxidant found in red algae. Not only can this antioxidant protect your cells from damaging free radicals, it can also put the brakes on the inflammation that is often the culprit behind so many nagging health issues.

I’ve treated many patients with this approach, and by shielding them with powerful antioxidants while at the same time reducing systemic inflammation, I’ve helped them achieve incredible, body-wide health benefits including:

✔ A Stronger, Better Working Heart
✔ Sharper Memory & Mental Clarity
✔ Pain-Free Joints & Improved Flexibility
✔ Protection for Their Vision
✔ Boosted Energy, Strength & Endurance
✔ Optimized Immune Health
✔ More Youthful-Looking Skin

Durable HEART

By Far the Most Potent Antioxidant on Earth

Data from leading laboratories around the world has shown this incredible red algae antioxidant to be 6,000 times more potent than the venerable Vitamin C—known for decades to be one of the most powerful and health-giving antioxidants available.* 

The very same data shows this unique antioxidant to be 560 times more potent than green tea; 800 times more potent than CoQ10; and even 3,000 times more powerful than resveratrol, offering you the highest level of protection for your brain, heart, eyes, skin and entire body.*

In fact, when you line up all of the world's most powerful antioxidants, nothing comes close to this antioxidant's potency. In my 20+ years of treating patients, I've never seen anything like it. 

What makes this red algae antioxidant so much more effective than other antioxidants like vitamin C? It has the unique and remarkable ability to go where other antioxidants can't, penetrating and armoring every cell, tissue and organ in your body.*

If You’re Going to Take One Antioxidant
for Cellular Protection, This Should Be It

Earlier I called this antioxidant one of the most powerful on earth. I don’t throw that phrase around lightly, and you’re about to learn why.

The red algae antioxidant I’m talking about is a unique carotenoid called Astaxanthin, found naturally in microalgae, and its sheer potency is unlike any other antioxidant yet discovered.

Marine algae is among the most ancient and resilient forms of plant life on earth. Researchers believe the secret to its extraordinary hardiness may lie in its cells’ ability to produce the powerful antioxidant Astaxanthin, which creates a “shield” of protection that helps it survive harsh environmental conditions—from UV radiation to toxins to drying winds and the force of beating waves.

Durable SHIELD

Thanks to recent scientific advances, now you can harness the power of this incredible antioxidant to shield the cells in your body against the ravages of aging. The key is to take the right type of Astaxanthin and the right amount (more on that later).

Look and Feel Great as the Years Go By

As I mentioned above, the oxidative stress that is so harmful to your body is caused by free radicals, and this invisible threat can be the deciding factor between whether you age faster than expected or look and feel great as the years go by.

One big problem is that your body’s natural “built-in” antioxidant defenses can only neutralize low levels of free radicals.

Unfortunately, pollution, processed foods, pesticides, chemical exposure and pharmaceutical drugs combined with our hectic 24/7 modern lifestyle all work together to generate an excess of free radicals that can overwhelm our natural defenses.

This is where Astaxanthin comes to the rescue, neutralizing free radicals, stopping oxidative stress dead in its tracks, and creating a potent shield of protection for every cell in your body.*

Oxidation Breaks Down Your Mitochondria
and Astaxanthin Can Put an End to That

You may have learned about mitochondria in high school biology. They are the “power plants” inside every cell. They produce the energy that fuels everything you do.

And now scientists say it’s where aging begins, because oxidative stress breaks down your mitochondria. Thankfully, Astaxanthin combats this breakdown, slowing down aging and protecting your precious energy levels.

A study from Japan confirms that Astaxanthin not only protects mitochondria from oxidative stress but is also “effective in improving mitochondrial function.*

That’s why I recommend Astaxanthin to any of my patients who want to fight back against aging and for those who want to enjoy more energy every day.

Astaxanthin Is One of the Few Antioxidants
That Boosts Your Brain and Memory

The blood-brain barrier is a unique layer of cells in your brain’s blood vessels that determines what can and what can’t get through.

Astaxanthin is one of the few antioxidants that gets the “green light” to access your brain cells. This is critical since the brain has some of the highest levels of oxidative stress in the body which is associated with age-related cognitive decline.

Neurosurgeons writing in GeroScience cite over 90 studies to confirm Astaxanthin as “a useful compound in delaying or ameliorating cognitive impairment associated with normal aging.*

And this kind of expert medical confirmation of Astaxanthin’s power is happening all over the world.

Medical Specialists in So Many Fields Test Astaxanthin...
and Come Away Impressed

Like the neurosurgeons I mentioned above, doctors in other fields have also been won over by Astaxanthin’s amazing benefits:

✔ Aging Specialists at the acclaimed Juntendo University School of Medicine report how it helped older adults with age-related forgetfulness improve their cognitive scores significantly after taking 12 mg daily for 12 weeks.*

Dermatologists in Europe confirmed its ability to protect skin from dangerous UV radiation and how it “inhibits collagenases, MMP activity, inflammatory mediators and ROS induction."*

Cardiovascular Experts determined that 12 mg of Astaxanthin taken daily resulted in reduced triglycerides and increased “good” HDL cholesterol in a 12-week hospital study.*

Blood Sugar Specialists at Japan’s highly-regarded Kamiichi General Hospital showed how 12 mg of Astaxanthin taken daily helped improve glucose metabolism.*

Ophthalmologists in Italy concluded: "Preclinical and clinical evidences support the potential use of Astaxanthin in the prevention and treatment of age-related vision concerns."*

Immunologists found that Astaxanthin dramatically enhanced immune response while reducing inflammation and protecting immune cells against oxidative stress.*

Gastroenterologists in 2020 noted how “Astaxanthin has important preventive and therapeutic effects” for liver health in a 2020 study, thanks to its antioxidant and anti-inflammatory abilities.*

As a forward-thinking physician, it’s great to see mainstream medical experts and natural health advocates agree on this safe, effective phytonutrient.

The Astaxanthin Buyer’s Guide
I Give to My Patients

My patients often ask me what they can eat to boost their levels of Astaxanthin. Unfortunately, it's hard to get the concentrated levels of Astaxanthin you need from food alone, so a dietary supplement is going to be your best move.

However, don't just go out and buy the first Astaxanthin you see online or on the store shelf. I advise my patients to follow these simple guidelines:

1) The Right Dose Matters: The vast majority of Astaxanthin on the market provides only 4 mg. This isn’t enough. The clinical research shows you should take a triple-strength 12 mg daily dose.

2) Only Take a Softgel: The fat-soluble properties of Astaxanthin make it best absorbed when taken in an oil base, which is only possible with a softgel delivery system. 

3) Natural Astaxanthin or Nothing: Up to 95% of the Astaxanthin on the market is synthetic and has significantly weaker antioxidant properties. 


My Patients Had a Hard Time Finding a Reliable Astaxanthin Supplement,
So I Decided to Formulate My Own

Too many of my patients were having a hard time finding naturally-sourced Astaxanthin in a 12 mg softgel. And when they could, they found it absurdly expensive.

That’s when I decided it was time to formulate my own Astaxanthin supplement that would be of the highest quality, yet affordable.

Fortunately, I also serve as Chief Science Officer for Durable™, a cutting-edge dietary supplement company that I co-founded.  Working with my team, together we created Durable SHIELD™ and every softgel provides a full 12 mg dose of Zanthin®, the finest, highest quality, natural Astaxanthin on the planet.

This patented form of Astaxanthin is sourced exclusively from Haematococcus pluvialis, a rare species of microalgae that contains highly concentrated levels of natural astaxanthin. It’s grown in a pristine, controlled environment in Chile and extracted in the U.S. naturally without harsh solvents or harmful chemicals to ensure the utmost purity and potency.

And what makes Durable SHIELD truly superior to any other Astaxanthin supplement on the market is that it includes a second super-antioxidant that I also recommend to my patients: Pomanox® Pomegranate Extract.


Made from pomegranates grown in Spain’s nutrient-rich soil, Pomanox is an extremely pure, whole-fruit extract concentrated with up to 30% punicalagins, the unique polyphenols found in pomegranates that make them a prized superfood.

Why do I like my patients to also take Pomanox?

Studies show that Pomanox can decrease powerful pro-inflammatory compounds in the blood and increase anti-inflammatory compounds. It can also neutralize oxidative stress in joints, cartilage and connective tissue. The result is pain-free muscle and joints as well as enhanced flexibility and mobility.** When combined with Astaxanthin, you get a dual-action solution that is stronger then any other combination possible.

Five Reasons Why Durable SHIELD
 Will Make You Feel Better Every Single Day

1) 12 mg of Astaxanthin: You get triple the dose of most supplements, which only feature 4 mg. Some are even 2 mg!

2) 100% Natural and Pure: It's formulated with patented Zanthin, the finest, highest quality, natural Astaxanthin on the planet.

3) Enhanced with Pomanox: It's the only Astaxanthin supplement on the market that features this patented pomegranate for unrivaled antioxidant protection.

4) Quality You Can Trust: This state-of-the-art formula is produced here in the U.S. in an FDA-regulated facility for unparalleled quality.

5) Unbeatable Value and a One-Year Guarantee: For a limited time, buy two bottles of Durable SHIELD and get one absolutely free! Plus, get free shipping for a total savings of over $50. And if for some reason you aren't satisfied, you have 12 months to get a 100% refund. We even pay for the return shipping.

SHIELD with Pill.png__PID:9c86f3f2-ed3f-4ace-9e2f-e8b4bac187da

Durable SHIELD Will Help You Feel and Age Your Best

With two of the most potent, well-studied antioxidants for body-wide protection from oxidative damage linked with so many age-related complaints, Durable SHIELD lives up to its name and gives you the “firepower” you need to fight back against aging.

Get 1 Bottle FREE—Over $50 In Savings!

Plus, Durable SHIELD is less expensive than many inferior Astaxanthin supplements that aren't enhanced with a powerful, patented pomegranate extract.

That’s why I’m convinced that Durable SHIELD will help…

Protect your heart, keeping it strong and healthy
Keep your memory and cognitive skills at their best
✔ Keep your blood sugar levels in a healthy range
Keep your vision clear so you don’t miss a single thing
Enjoy comfortable joints that stay strong and flexible
Stay energized, motivated and happy to greet each new day
✔ Nourish your skin and reduce the visible signs of aging


I invite you to put Durable SHIELD to the test and see the difference it makes in your life. And please don’t forget that Durable SHIELD comes with a one year “any reason” guarantee that includes free return shipping. 


Dr. Kevin Passero is a leading functional medicine expert and practicing naturopathic physician† on a mission to empower people to take control of their health. Through his two popular clinics in the Washington, DC metro area, he’s helped thousands of people find the root causes of their health imbalances and recover their energy, vitality, clarity and resilience. Dr. Passero blends cutting-edge diagnostics with proven natural therapies to help his patients get results. He formulates every Durable supplement drawing on his over 20 years of clinical experience and the latest scientific research. Outside of work, you can often find him enjoying the outdoors with his family.

†Dr. Kevin Passero is a licensed Naturopathic Physician in the District of Columbia and licensed Naturopathic Doctor in the State of Maryland.

General Disclaimers: The information contained above is for general consumer understanding and education, and should not be considered or used as a substitute for medical advice, diagnosis or treatment. This product is not an alternative to any prescription drug. If you are currently taking a prescription drug, consult your doctor before making any changes. 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. Testimonial results not typical. Customers may have received a gift certificate after submitting their testimonial. All contents Copyright 2023 Perpetual Health, LLC, dba Durable. All rights reserved. Republishing of Durable content without written authorization is strictly prohibited.

*Statements on this website have not been evaluated by the Food and Drug Administration. Any products discussed or advertised are not intended to diagnose, treat, cure or prevent any disease. Testimonial results are not typical. Customers may have received a gift certificate after submitting their testimonial. If you are pregnant, nursing, taking medication, or have a medical condition, consult your physician before using any dietary supplement.