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Animal Essentials Sea-Flex 100 g jar with a scoop of powder. Joint and mobility support infographic featuring a German Shepherd with comfort, flexibility and active-aging callouts. Sea-Flex ingredient diagram with a powder-filled scoop, calcified red seaweed, green-lipped mussel, yucca, astaxanthin, horsetail and licorice. SeaFlex original serving guide. Sea-Flex joint and mobility support benefits beside a German Shepherd. Animal Essentials Sea-Flex product facts infographic with ingredient information and a scoop of powder. Animal Essentials Sea-Flex 100 g jar beside a dog nuzzling a cat. Animal Essentials herbal expertise, quality and sourcing infographic with a dog in a sunlit field. Back of an Animal Essentials Sea-Flex jar showing ingredients, cautions and manufacturer information. Rear view of an Animal Essentials Sea-Flex jar showing product information, directions and barcode.

Sea-Flex Powder | Joint Comfort & Mobility Support

$37.95

When the walk or game they usually enjoy looks less comfortable, you notice.

Animal Essentials Sea-Flex provides daily joint and mobility support for dogs and cats, helping them stay comfortable through the everyday activities they enjoy.

Supports Joint Comfort & Mobility
Helps Maintain Connective Tissues
Provides Antioxidant Support
Supports Bone Health
Supports even better with:
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SeaOmega salmon-pollock oil bottle, front.
Sea-Omega | Salmon-Pollock Fish Oil | High in Omega 3 & 6 Fatty Acids | EPA | DHA
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Sea-Flex Joint Supplement Powder is a daily-use formula designed to support long-term joint comfort, flexibility, and resilience in both cats and dogs. It works with the body to maintain healthy joints, support connective tissue strength, and promote natural resilience against the wear and tear of daily movement. At the heart of the blend is green-lipped mussel, a marine superfood naturally rich in glycosaminoglycans and omega-3 fatty acids which promote healthy, normal inflammation.

What makes Sea-Flex especially effective is its thoughtful combination of joint-supportive herbs and antioxidants. Rather than relying on isolated compounds, Sea-Flex combines green-lipped mussel and astaxanthin, antioxidant-rich herbs, and gentle detoxifiers that help the body manage inflammation, nourish cartilage, and protect joint tissues from oxidative stress. Ideal for pets showing early signs of stiffness, aging animals, or active companions who need everyday joint support, this formula helps keep your pet moving comfortably—without artificial additives or unnecessary fillers. Whether used for prevention or ongoing care, Sea-Flex offers natural, full-spectrum support to help your pet stay active and comfortable throughout every stage of life.

Animal Essentials Sea-Flex Joint Powder comparison chart
NASC Certified
We've Rebranded
All-Natural Herbal Supplements
Made in USA with Globally Sourced Ingredients
Vet Recommended
Animal Cruelty-Free

Your guide to safe, effective herbal support—tailored to your pet.

Best if administered directly into mouth or combine with your pet’s regular routine, once daily.

One scoop equals 1 tsp.

Whole Herbs, Real Benefits
Dehydrated Calcified Seaweed (Lithothamnion spp.)
A mineral-dense sea plant that accumulates calcium, magnesium, and trace elements during its life cycle. This algae-based calcium source supports bone strength, muscle function, and healthy cartilage without the contaminants often found in land-based mineral sources.
Dehydrated Calcified Seaweed (Lithothamnion spp.)
Green-Lipped Mussel (Perna canaliculus)
A marine superfood packed with omega-3 fatty acids (EPA, DHA, ETA), glycosaminoglycans, and unique marine proteins that promote joint lubrication, help reduce stiffness, and support cartilage health. Sourced from New Zealand, this ingredient is widely recognized for its ability to promote joint health and mobility naturally.
Green-Lipped Mussel (Perna canaliculus)
Yucca Root (Yucca schidigera)
Traditionally used to support joint comfort, yucca contains natural saponins and polyphenols that help assure healthy inflammatory responses. It also aids digestion and nutrient absorption, further enhancing joint wellness.
Yucca Root (Yucca schidigera)
Horsetail Herb (Equisetum arvense)
A plant rich in silica, an essential mineral for collagen formation and the structural integrity of joints, ligaments, and bones. Horsetail supports tissue regeneration and strengthens connective tissues.
Horsetail Herb (Equisetum arvense)
Licorice Root (Glycyrrhiza glabra)
A soothing herb known for supporting adrenal balance, immune function, and healthy inflammation pathways. Licorice helps maintain a healthy response to stress and inflammation in joints and throughout the body.
Licorice Root (Glycyrrhiza glabra)
Astaxanthin (Haematococcus pluvialis)
A potent antioxidant derived from microalgae, astaxanthin supports cellular integrity by neutralizing free radicals that contribute to joint degradation. These antioxidant benefits extend beyond the joints, circulating throughout the body to neutralize these damaging molecules.
Astaxanthin (Haematococcus pluvialis)

Frequently Asked Questions

Sea-Flex supports joint comfort and flexibility, including occasional stiffness associated with normal daily activity. It can fit an ongoing mobility routine for active or aging dogs and cats.

Some pets may show changes within 1–2 weeks; others may need 4–6 weeks of consistent use before the response is clear. Individual responses vary. If the condition worsens or does not improve, discontinue use and consult your veterinarian.

Look at familiar activities: getting up after rest, walking and joining in play more comfortably. The aim is easier everyday movement and joint flexibility.

Calcified seaweed supplies a mineral foundation, while green-lipped mussel contributes marine components selected for joint structure and comfort. Yucca and licorice are selected for comfort support, horsetail is selected for structural support, and astaxanthin adds antioxidant support.

Yes. It contains green-lipped mussel, a shellfish ingredient. Consult a veterinarian before use if your pet has a shellfish sensitivity.

No. Sea-Cal is a single-ingredient calcium-and-magnesium powder. Sea-Flex combines calcified seaweed with green-lipped mussel, herbs and astaxanthin for a broader joint-comfort purpose. The serving amounts are not interchangeable.

Use the species- and weight-specific amount in Directions once daily. It is best administered directly into the mouth or combined with your pet’s regular routine; give during or after eating. One scoop equals one teaspoon.

Have your veterinarian review the combination first. Another joint formula may duplicate shellfish, minerals, licorice or other ingredients, and suitability depends on your pet’s health and medication.

Sea-Flex fits an ongoing mobility plan, with the need for continued use considered alongside your pet’s comfort and care. If the condition worsens or does not improve, discontinue use and consult your veterinarian. Safe use in pregnant animals or animals intended for breeding has not been proven.

The powder’s natural flavor comes from its marine and herbal ingredients; it has no artificial flavoring.

The extra space leaves room for the scoop and makes the powder easier to measure with less spillage.

  • 5 stars: 14 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
P
Patricia K.

Extremely helpful with Jake's stiff backend.

J
Jeannette O.
Helps their joints

I've been using this joint supplement for my doggies for several years and it helps with their joints.

S
Stephanie
Good for stiff dogs

This has been a great addition for my dog when he seems stiff and slow getting up. Easy to mix into food and he does well with it.

E
E. S.
Excellent product

Highly recommended for dogs

D
DJW69
Arrived as described

The product arrived as described and on time.

P
Paws
Best Joint Supplement for Dogs

Ive given this supplement to my dogs for 10 years. Noticed a big difference in their digestion when I stopped for a few months. But I've started adding it to their food again. I won't stop again!

S
Shirley
Good product

I started buying this brand from the pet food store near my house. I know the owner won't sell anything that she would not use for her own dogs. So I knew it was a good brand. I have a 10 year old Weimaraner and have been using this for a while now. And he is doing well on it. I did find it a little cheaper on Amazon than at the pet store. I put it in his morning food along with the Omega 3 I give him each day.

B
Beagle S.
Great product

This has been a really good joint support powder for my pets. My only issue was the Prime delivery delay, so give yourself extra time in case shipping slips.

E
Erika B.
Life saver

My dog has joint issues and it is a life saver. Easy to use, just sprinkle it on top of his food.

P
Pamela D.
Good quality

Great quality. I add it to the home made food I make for my dog

S
Stephanie
Good product

Seems to help.

J
Jill
Helped my young dog look and feel better

I inherited a 1 year old dog who was already on this and there was still a little left in the bottle. Her overall condition was amazing, and she moved so comfortably that my dogs paled in comparison. I bought the larger bottles so I could get everyone on it.

E
Elizabeth
Works well

Works really well to help my aging dog with joint stiffness and mobility. Nice that you give it once a day versus with every meal. Easy to mix in with her food and she does not notice it.

t
theboyzsmomma
Great for aging dogs

We have been using this product for years, and it works well for our dogs.

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Trusted for Decades.

For decades, Animal Essentials has been committed to enhancing your pet's health with all-natural, ethically crafted supplements—that work.
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RETURN TO NATURE
Crafted by expert herbalists, Animal Essentials brings the healing power of nature back to your pet's daily routine with pure, plant-based supplements that support whole-body wellness.
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For over 30 years, Animal Essentials has earned the trust of veterinarians and pet parents alike for producing effective natural supplements—and we honor that trust in every bottle we make.
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To uphold our standards we conduct third-party testing on all our products for potency, purity, and consistency, ensuring the quality and effectiveness of every batch.
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MADE IN USA WITH GLOBALLY SOURCED INGREDIENTS
Formulated, extracted and bottled in house ensuring integrity and care in every step.
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PREMIUM INGREDIENTS
Our process begins with the finest natural ingredients, sourced transparently from ethical suppliers who meet our rigorous standards for purity, potency, and sustainability.
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NO DYES, PRESERVATIVES, OR ARTIFICIAL FLAVORING
We skip the dyes, preservatives, and artificial flavoring because nature's purity is powerful, and we're bringing nature to your pet in its truest form.