Sea-Cal | Seaweed Calcium Supplement Powder | Strong Bones & Healthy Joints | 240G

$40.95

Sea-Cal is a natural calcium supplement powder made from seaweed that supports strong bones, teeth, and overall skeletal health in pets. Our formula provides naturally occurring bioavailable minerals from seaweed, making it a cleaner, more absorbable alternative to traditional calcium sources.

Provides Bioavailable Calcium
Supports Bones, Joints and Teeth
Supports Healthy Mobility
Promotes Long-Term Musculoskeletal Health
Supports even better with:
Joint Support Herbal Tonic Blend | Helps Stiffness and Soreness
$34.95 $6.99
Alfalfa Single Herb Tonic | Maintain Joint Mobility & Digestion
$22.95

Sea-Cal is a highly absorbable calcium supplement sourced from Lithothamnion spp., a species of red marine algae harvested off the clean, cold waters of Iceland. Unlike many calcium supplements that rely on bone meal, oyster shell, or limestone—sources that can carry environmental toxins or lack proper mineral balance—Sea-Cal delivers naturally occurring calcium in a porous, plant-based matrix that enhances absorption and utilization by the body.

In addition to calcium, Sea-Cal contains naturally occurring magnesium, boron, and trace minerals that work synergistically to support strong bones, joint function, and healthy nerve transmission. This full-spectrum mineral profile is especially important for pets on homemade or raw diets that may be calcium-deficient, as well as growing puppies and kittens, seniors, or pets recovering from injury or illness.

Easy to mix with food, Sea-Cal is gentle on the stomach and safe for daily use. It helps maintain proper calcium-phosphorus ratios in meat-based diets and supports balanced bone development and long-term musculoskeletal health in both cats and dogs.

Animal Essentials’ Sea-Cal stands apart for its use of calcified red marine algae (Lithothamnion spp.)—a sustainable, plant-based source of calcium that’s naturally rich in magnesium and trace minerals. Unlike traditional calcium supplements, Sea-Cal offers a cleaner, more bioavailable form of calcium that’s easy for your pet’s body to absorb and utilize, without the risk of heavy metals or animal byproducts. Ideal for all pets, Sea-Cal delivers a safe, filler-free solution rooted in nature and backed by integrity.

Why Animal Essentials difference

Active Ingredients:

Dehydrated Seaweed meal

Guaranteed Analysis per 3g tsp.:

Calcified Lithothamnium seaweed harvested from the Atlantic seabeds off Iceland’s coast. Moisture 5.0% max

Ash 89.0% min

Calcium 33.0% min

Calcium 38.0% max

Magnesium 3.0% min

Sulphur 0.45% min

Phosphorus 0.5% min

Potassium 0.1% min

Sodium 0.0022% min

Sodium 0.010% max

Zinc 22 ppm min

Iodine 20 ppm min

200kcal ME/kg and 0.2 kcal ME/g

Inactive Ingredients:

None

NASC Certified
We've Rebranded
All-Natural Herbal Supplements
Made in USA with Globally Sourced Ingredients
Vet Recommended
Animal Cruelty-Free
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.

Directions: Best if administered directly into the mouth or combined with your pet’s regular routine, once daily.

Whole Herbs, Real Benefits
Red Marine Algae (Lithothamnion spp.)
The calcium in red marine algae supports bone density, dental health, muscle contraction, and nerve signaling. The natural ratio of calcium to magnesium helps ensure proper mineral balance, while the trace elements contribute to metabolic health, enzyme function, and overall resilience.
Red Marine Algae (Lithothamnion spp.)
Red Marine Algae (Lithothamnion spp.)
Nutrients: Iodine, calcium, iron, potassium, fiber, omega-3s, vitamins, and other minerals
Origin: Iceland
Red Marine Algae (Lithothamnion spp.)

Frequently Asked Questions

Sea-Cal is ideal for daily use in pets on raw or homemade diets that lack adequate calcium, as well as puppies, kittens, seniors, or any animal needing extra bone support. It’s also useful during pregnancy, lactation, or recovery from orthopedic injury.

Yes, Sea-Cal is formulated for both species and dosed by body weight. It mixes easily with wet or dry food.

Unlike bone meal, which may contain contaminants and is animal-derived, Sea-Cal is plant-based, sustainably sourced, and naturally balanced with magnesium and trace minerals—making it cleaner, safer, and more bioavailable.

Yes, Sea-Cal is gentle and safe for daily, long-term use. It supports healthy skeletal development in growing pets and maintains bone strength and joint mobility as pets age.

Sea-Cal has a mild, oceanic scent and flavor that most pets tolerate well. It blends easily into food and won’t overpower meals.

  • 5 stars: 4 (80%)
  • 4 stars: 1 (20%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Bill
... this product for a year now and have had great results. This is added as a supplement in ...

We have been buying this product for a year now and have had great results. This is added as a supplement in all natural dog food we make for our own dogs. As one of our dogs had many heart, respiratory and skin issues, two separate vets linked it to old age and nothing more they could do. on the verge of having to put her down, we turned to the idea of all natural raw diet for dogs we heard of, which consists of nothing more than raw meat (as the wild animals eat) vegetables, rice and/or potatoes, and a couple added supplements as in this calcium supplement. Our dog made a complete turn around within a couple weeks of the diet. She is back to playing with lots of energy and her hair has grown back in. Her heart still has issues, but is much better than ever before. Of course this supplement alone is not the cure, but it is an essential part in their diet.There is many different brands of seaweed calcium, but this is the one we chose and have had positive results, so we will always continue to purchase this brand.

L
Lauren B.
Seems to be a good product - No recommended daily dose to add at meals

Seems like a good quality product but if you are looking for something to add to your dog's food that has already been made then it will be quite difficult to figure out the dosage. I wanted this product to add needed calcium to my dog's homemade food as not all my meat has bone in it and his dental health is too poor for him to chew raw bones. I had already made a batch of food, that has no bone in it, and portioned it out in the freezer so I wanted to be able to have a supplement that I could just sprinkle on his food when he eats. Unfortunately, the only serving recommendations given on the container say to add so much to however many pounds of food and no recommendations for how much to feed per meal per the dog/cat's weight so I have no idea how much to add at meal time. I am just going to give a tiny sprinkle I guess as he needs the supplementation and I have already prepared this batch of food and can no longer add in the calcium per however many pounds of food I made. I can do this next time I make a batch of food without bone meal already in it but there really should be some sort of feeding recommended based on the dog's or cat's weight so the supplement can be added to already prepared meals.

S
Steve G.
This works for my dog

I have been using this product for about 6 months and it brought my dogs low calcium bloodwork up to normal. He is a 65 pound German Shepard mix and I mix in a heaping spoonful with every meal(homemade fresh food). Not sure of the reviews that have people adding this to how many pounds of food they have. It says right on the package 1 spoonful for every 25 pounds that your dog weighs. My dog is picky and has no issues eating his food with the powder on it. No digestive problems either. You can also add a little water on top of the food and mix it in to remove the chalkiness. Organic Nonfat greek yogurt is also a great way to give your dog calcium and protein but not every dog can tolerate dairy.

T
Tyler
Great for pet parents!

I’m a first-time dog owner and decided to try a homemade diet for my pup with help from my vet. I was a little overwhelmed at first, but Sea-Cal made things a lot easier. It’s super simple to use, and I feel good knowing my dog is getting the calcium he needs from a natural source. He’s been doing great on it! I also like that the ingredients are clean and sustainably sourced. Definitely recommend for anyone trying to feed their dog a more natural diet.

J
Jamie
High quality product

I’ve been using Sea-Cal Powder for a few months now with my dog, and overall, I’m really happy with it. I feed a homemade diet, so finding a clean, reliable calcium source was super important to me. This one stood out because it’s made from red marine algae, which feels like a better option than bone meal or crushed eggshells.

The powder mixes easily into food, and my pup doesn’t seem to notice it at all! No weird smell or taste that I can tell. It’s also reassuring to know it has other trace minerals and magnesium, which I know help with absorption. Her coat looks great lately, and her energy’s been solid, so I do think it’s making a positive difference.

H
Hannah

What is the recommended daily dose for a dog around 60lbs. I saw you replied with 4g for a 20lb dog. But 4g is the whole scoop and on the label it says 1 scoop for a dog that is above 75lb?

H
Holly L.

What would a daily dose be in grams for a dog less than 20 pounds?

Animal E.

Hi Holly,
For a dog less than 20 lbs, we'd recommend one 4g scoop, once daily.

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ROOTED IN NATURE.
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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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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.