Why Seaweed is a Superfood for Dogs

22 . October .2025Katy van suilchem0 Comments

Seaweed is not just some trendy superfood making the rounds on TikTok; it has actually been used for thousands of years, especially in Asian cooking in countries like Japan, Korea, and China. You can add it to your meals, stick it in a smoothie, or even use it in skincare; any way you like, really, to add it to your daily routine, and let seaweed do its thing.

Since it’s so popular in the human world, we figured, why not let dogs enjoy the benefits too? In fact, in recent years, more and more people have been waking up to the incredible benefits of certain supplements, like seaweed powder, goat milk and green lipped mussel for dogs.

There are countless amazing, 100% natural ingredients around us that are unbelievably good for us and our pups. So we say, away with the artificial fillers, additives, chemicals, and all the nasties that frankly do more harm than good, and hello to nature, hello to seaweed!

Cobbydog Natural Seaweed Powder

Our brand-new Seaweed Powder is made from 100% dried seaweed. It's full of iodine, essential trace minerals, antioxidants, omega fatty acids, and more, all of which help to support your dog from the inside out.

We’ll take a look at its key benefits, explain a little more about what actually happens in your dog’s body when they eat it, and explain the dos and don’ts to be aware of at mealtimes.

The Benefits of Seaweed Powder for Dogs

Dental Health

Seaweed is packed with natural compounds and minerals that work together to support your dog’s dental health. It contains phlorotannins, which are powerful antioxidants that stop the bacteria that cause plaque from growing.

It also contains fucoidan, which is a type of complex sugar that is antibacterial and anti-inflammatory. Natural minerals like calcium, magnesium, zinc and iron also play a role in strengthening teeth, supporting healthy gums and freshening breath.

Skin & Coat Health

Seaweed is excellent for a dog’s skin and coat because it’s packed with nutrients that keep them healthy. Minerals like zinc, iodine and selenium strengthen hair and help skin cells repair. The phlorotannins that we mentioned previously in regard to dental health also play a role here, protecting cells from damage.

Vitamins A, C, and E protect the skin and natural sugars like fucoidan and alginates help with hydration and healing wounds. Seaweed also contains omega-3 fatty acids, which make fur beautifully soft and furry.

Thyroid Health

Iodine is a key mineral, essential for normal thyroid function. The thyroid gland uses iodine to produce T3 (triiodothyronine) and T4 (thyroxine) hormones, which control metabolism, energy levels, growth, and coat condition.

When a dog (or human) gets enough iodine, the thyroid can function properly and produce the right amount of hormones to support digestion, maintain energy levels, manage weight more easily, and keep skin healthy. Adding seaweed to your canine’s foods is a great way to naturally support their thyroid health and overall well-being.

Digestion & Gut Health

As well as being super rich in minerals, seaweed for dogs is also a natural source of fibre.

Soluble fibres like alginates form a gel in the gut that slows digestion and keeps stools soft. Laminarin, which is another type of soluble fibre, feed the ‘good’ gut bacteria and acts as a prebiotic. Insoluble fibre in seaweed adds bulk to stools, helping to regulate bowel movements and reducing the risk of constipation.

Immune Health

This superfood can also have a positive effect on immune health. Ingredients like fucoidan and lamarin help the body fight illness and calm inflammation. Minerals such as zinc and selenium, antioxidants and vitamins also all play a role in protecting your cells and supporting your immune system to stay healthy.

Joint health

On top of all the other countless benefits, seaweed is also great for keeping pets’ joints healthy. Fucoidan reduces swelling and pain, while calcium and magnesium help keep bones, tendons and ligaments in good condition. Omega-3 fatty acids help with lubrication, which can be especially beneficial for older dogs or those with ongoing joint problems.

Antioxidants and phlorotannins also protect the joints from natural damage caused by stress and ageing, keeping pets active, mobile, and comfortable for longer.

How To Use Seaweed Powder

We recommend that you start with a light sprinkle of our 100% seaweed powder once a day over your dog’s food, then adjust the amount based on your dog’s size and weight. Consistency is key, so use it daily for best results. Always introduce new supplements slowly and monitor your dog’s response.

What to Be Aware Of

Seaweed powder is not suitable for dogs with thyroid problems because it naturally contains iodine, and too much iodine can lead to issues like weight changes, restlessness or tiredness.

Although it’s not that common, dogs can be allergic to seaweed, so stop use immediately if your pet shows any sign of a reaction. It’s also worth noting that you should never let dogs chew seaweed from the beach, as it can contain harmful bacteria or high levels of salt.

Why Seaweed?

In short, seaweed is one of nature’s richest sources of minerals, trace elements, vitamins, and antioxidants, which are all fantastic for your pup. It also contains certain unique compounds, like fucoidan, that are hard to find in other foods.

Long valued as a human food supplement that supports energy levels, heart health, and general health, and the same can be said for dogs. It’s an excellent addition to any dog’s diet, supporting metabolism, digestion, immunity, dental and skin health, to name a few.

Try our 100% Seaweed Powder today and see the difference for yourself!

Frequently Asked Questions

We’ve gathered our most frequently asked questions to make sure you’ve got all the information you need before deciding whether seaweed powder could be a good addition to your pup’s daily routine.

Is it okay for dogs to eat seaweed?

Yes, dogs can eat seaweed, but it must be plain, human-grade seaweed in small, controlled amounts. Products that are specifically formulated for dogs, like Cobbydog’s 100% Seaweed Powder, are the safest option. If you have any concerns about feeding your dog seaweed, speak to your vet.

Does seaweed really clean a dog’s teeth?

Yes, certain types of seaweed can help clean dogs’ teeth by reducing the buildup of plaque and tartar and freshening their breath. Seaweed contains compounds that break down plaque and prevent it from building back up, making it an excellent natural supplement for oral hygiene.

How does seaweed help dogs?

Seaweed helps dogs in a variety of ways, including with dental health, skin and coat health, thyroid function, digestion, gut health, immunity, and joint health. It is rich in vitamins, minerals, antioxidants, and active compounds that make it somewhat of a superfood in the human and animal world.

How much seaweed can I give my dog?

For smaller dogs, a sprinkle of seaweed on top of their regular food once a day is usually enough for them to make the most of the benefits. For larger dogs, this may be adjusted. Be careful not to feed too much, as this can negatively affect digestion and mean your dog ends up consuming too much sodium.

Glossary

Alginates - Natural fibres found in seaweed that absorb water and help digestion. They support gut health in dogs and can aid regular bowel movements.

Antioxidants - Molecules that protect cells from damage caused by free radicals. Seaweed is rich in antioxidants, which help protect pets’ joints, skin, and immune system.

Calcium - A mineral that is found in seaweed and is essential for strong bones, teeth, and muscle function.

Complex Sugar - Long-chain carbohydrates that the body digests slowly. They can act as prebiotics, feeding good gut bacteria and supporting digestion.

Free Radicals - Unstable molecules that can damage cells, proteins, and DNA. The antioxidants in seaweed help neutralise free radicals, protecting your dog’s cells.

Fucoidan - A unique complex sugar found in seaweed that helps reduce inflammation and support a healthy immune system.

Iodine - A mineral needed to produce hormones in the thyroid gland. Seaweed is one of the best natural sources of iodine you can find.

Insoluble Fibres - Fibres that do not dissolve in water and help move food through the digestive system.

Laminarin - A complex sugar that supports the immune system and has a positive effect on gut health.

Magnesium - A mineral found in seaweed that is crucial for muscle function, nerve signalling, and bone health.

Metabolism - The process by which the body converts food into energy. Iodine and other minerals in seaweed help to regulate metabolism and support overall well-being.

Omega-3 Fatty Acids - Healthy fats found in seaweed that reduce inflammation and support heart, skin, and joint health.

Phlorotannins - Special antioxidants unique to seaweed that protect cells and joints from damage.

Prebiotic - A substance that feeds the good bacteria in the gut.

Selenium - A mineral found naturally in seaweed that protects cells from damage and supports immunity.

Soluble Fibres - Fibres that dissolve in water to form a gel-like substance, which slows digestion and helps to feed good gut bacteria, supporting a healthy digestive system.

T3 (Triiodothyronine) - A hormone produced in the thyroid gland that regulates metabolism and energy use.

T4 (Thyroxine) - Another thyroid hormone which also controls metabolism.

Thyroid Gland - A small gland in the neck that produces hormones controlling metabolism, growth, and energy.

Trace Minerals - Minerals only needed in very small amounts, such as zinc.

Why Seaweed is a Superfood for Dogs

Cobbydog Natural Seaweed Powder