Dr. Mercola SpiruGreen Superfood Tablets Dog & Cat Supplement, 180 count

  • List Price:


  • Price:

    $14.97 FREE 1-3 dayShipping over $49

  • You Save:

    $3.78 (20%)

Autoship: &Save

$14.22(Save an extra 5%)

Simply select Autoship at checkout for easy regular deliveries.

Why Autoship?
  • FREE access to chat with licensed vets 7 days a week.
  • Save 5% on all future Autoship orders.
  • No fees, no commitments - cancel Autoship anytime.
In stock
cw-icon-heart Created with Sketch. Add to Favorites

Give your pal a boost of nutrition with the Dr. Mercola SpiruGreen Superfood Tablets Dog & Cat Supplement. It contains spirulina and microalgae, natural algae that provide astaxanthin, a super-nutrient that’s known to promote health and wellness in cats and dogs. Astaxanthin helps promote normal eye and neurological health, support healthy cardiovascular and immune systems, and may even help support comfortable joints. Plus, spirulina is naturally high in antioxidant carotenoids―compounds that help make vitamin A and that fight free radicals―plus enzymes and phytonutrients that nourish the skin and coat. Trusted for safety and effectiveness, the organic spirulina is USP verified and contains no iron or trace minerals.

Key Benefits
  • Supports wellness, mobility and immune system health in cats and dogs with antioxidant rich algae.
  • With organic, vegetarian-grade spirulina and microalgae that are high in astaxanthin, enzymes and antioxidants.
  • Astaxanthin supports a healthy immune and cardiovascular system, plus healthy eyes and joints.
  • Spirulina is high in carotenoids that fight free radicals and help support skin and coat health.
  • Formula is perfect for cats and dogs and is made with no fertilizers, pesticides, toxins, iron, wheat, gluten, corn, or soy.

Safe use in pregnant animals or animals intended for breeding has not been proven. If animal's condition worsens or does not improve, stop product administration and consult your veterinarian.

Shop Prescription Medications from Chewy Pharmacy alt text

See all items by Dr. Mercola

  • Item Number
  • Packaging Type
  • Lifestage
    Adult, Senior, Puppy, Kitten
  • Breed Size
    Small Breeds, Medium Breeds, Large Breeds, All Breeds, Giant Breeds, Extra Small & Toy Breeds
  • Food Form
  • Product Form
Nutritional Info

Active Ingredients: Organic Spirulina 485mg, Microalgae 15mg.

Inactive Ingredients: Silicon Dioxide.

Feeding Instructions

Administer orally, once per day.

Animal Type and WeightServing SizeTablets
Cats500 mg1 tablet
Dogs up to 14 lbs500 mg1 tablet
Dogs 15 - 29 lbs750 mg1 1/2 tablets
Dogs 30 - 49 lbs1 g2 tablets
Dogs 50 - 79 lbs1.5 g3 tablets
Dogs 80+ lbs2 g4 tablets

Why should I include vitamins & supplements in my pet’s diet?

Most commercial pet foods include baseline vitamins and nutrients, but some may not have the adequate amount to suit your pet’s exact health needs. Like in humans, vitamins and supplements can help support your pet’s long-term health, regulating everything from digestion to muscle growth. Consult your veterinarian to determine the best vitamins and supplements for your furry friend.

How often should I give this supplement to my pet?

It is recommended to give the suggested dosage based off your pet’s weight. Please refer to the Feeding Instructions tab and consult with your veterinarian for more information.

Is this supplement safe to use with the medication my pet is currently taking?

If your pet has a medical condition and is taking other medication, we recommend consulting with your veterinarian to ensure that this supplement is safe to use.

My pet is allergic to certain ingredients, will this product be safe to use?

For a complete list of ingredients, click on the 'Nutritional Info' tab, next to the 'Description' tab, just under the product photos. If you are unsure about the safety of this product for your pet, we recommend consulting with your veterinarian.

Does this product come in other product forms?

For a complete assortment of products by the manufacturer of this supplement, click on the link next to the item name at the top of the page. You can also find an assortment of supplements across all product forms on our page.

Rating: 4.5 of 5 stars 28 Reviews 28 Reviews 4.6 out of 5 Stars

Filter reviews by star rating

93% Recommend

93% of reviewersrecommend this product

Rating: 4.5 of 5 stars 4.6 / 5

You've Already Reviewed This Item

28 Reviews

Showing 1-10 of 28 Reviews

  • 5 out of 5 stars

    Our Shepherd LOVES these tablets!

    By 2Shepherds on Jul 13, 2021 top100Contributor

    Very happy to say that our girl loves her spirugreen tablets! She gets 3 a day for her size, and crunches them up as soon as I give them to her. I was afraid she'd just swallow them, but she chews them with no problem. Will definitely continue to purchase since it's a great supplement, and is offered at such a reasonable cost. I haven't attempted to give to any of our cats, so can't say how that would go over! Will definitely continue to purchase.

    You liked it! Something went wrong. Please try again later. Report
  • 1 out of 5 stars

    Cats will not eat

    By Mike on May 5, 2021

    We have 2 cats that will eat almost anything. They will not touch these. We tried whole, sniffed, put in mouth, spit back out. Our cats gobble soft food, I crumbled the pill into the food and the cats walked away. I have a complete bottle -4 pills that sits in the cabinet. I do not know if these pills are beneficial or anything since the cats will not eat. If a cat will eat them, it might be good for them.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    daily serving of superfood

    By pauline on Apr 7, 2021

    This is perfect and easy for my two poodle terrier furkids. I just give each the right serving and they just chew and swallow. They love veggies to begin with especially the dark green leafy ones Italian/Lacinato kale and spinach.. so once they taste the “green” in this supplement, they need no further coaxing to chew & swallow the tablets.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    Good for post-vaccination detoxing

    By Popcorn on Jul 11, 2020

    A friend in England suggested that I give my dog spirulina to flush the heavy metals from the vaccinations out of her system (my dog gets grey eye discharge for a few days after each jab). Until I found this I was giving her straight up spirulina powder but it was difficult to dose as a lot would stay on the bottom of her dog dish. These are a great way to ensure a consistent does but contrary to other reviews that say they don't need to disguise this with food or treats, my dog will not eat it on its own.

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    Guess I am lucky...

    By KCtaos on Sep 6, 2020

    My treat driven 13 yo cat eats one per day, no problem, but now this is out of stock!

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    Awesome product

    By Chibby on Jan 24, 2020

    Love love Mercola supplements! Thank you Dr. Karen Becker for your educational videos and publications! Thank you Chewy for your great products, fast shipping and great customer service!

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    Super supplement!

    By Marci on Nov 13, 2019

    I've used SpiruGreen off and on for several years for my cats and my dogs. All of my pets have loved the taste. The tablets can be easily broken into halves or thirds for cats. SpiruGreen has seemed to give my pets a beneficial boost when their immune systems needed it (runny noses, sneezing, dry skin, etc.). Highly recommended!

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars

    Makes food more complete

    By HoneysNewMom on Aug 20, 2019

    Been giving this supplement to my 11 year old Shiba Inu rescue for Four years. He’s in excellent health, runs like a puppy, and still has fun smelling stuff. Biggest benefit —- feeding RAW FORMULA !!! Excellent value ! Excellent results !

    You liked it! Something went wrong. Please try again later. Report
  • 5 out of 5 stars


    By Janet on Jun 1, 2019

    My 9 year old went from lifeless to spunky within 2-3 months of taking all of Dr Mercola’s products. I have yet to find a dog food that gives her what she needs. Adding these supplements has helped her tremendously and hoping to prolong her life for many more years to come. This superfood tablet does what it says. Our vet is impressed with her health change since we began her on all of Dr Mercola’s products.

    You liked it! Something went wrong. Please try again later. Report
  • 1 out of 5 stars

    Not suitable for cats

    By Lucicat on Jul 4, 2019

    The pills are too big and hard for cats to chew them. Mine only played with then and showed no interest in eating them.

    You liked it! Something went wrong. Please try again later. Report