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Resthyro™ for Cats

Support for Hyperthyroidism in Cats

USD $50.95

buy 2 and save $3

3 month supply for a small to medium size

A vet-formulated feline hyperthyroidism remedy designed to help balance thyroid function, as well as manage secondary feline hyperthyroidism symptoms.

  • Supports balancing of thyroid function
  • Helps with hyperactivity
  • Helps balance the appetite
  • Supports organs affected by hyperthyroidism, like the heart
  • Can be used alongside vet treatment as supplemental support
USD $50.95
USD $50.95

buy 2 and save $3

3 month supply for a small to medium size

A vet-formulated feline hyperthyroidism remedy designed to help balance thyroid function, as well as manage secondary feline hyperthyroidism symptoms.

  • Supports balancing of thyroid function
  • Helps with hyperactivity
  • Helps balance the appetite
  • Supports organs affected by hyperthyroidism, like the heart
  • Can be used alongside vet treatment as supplemental support

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  • Description
  • Ingredients
  • Dosage
  • FAQ


Hyperthyroidism Support for Cats

NHV Resthyro™ feline hyperthyroidism remedy is made with quality herbs that are formulated to work together to support the balance of your cat’s thyroid function, support the organs affected by hyperthyroidism, and support feline hyperthyroidism symptoms. This formula has helped to support feline hyperthyroidism, for thousands of pets across the world!

  • Supports balanced thyroid function
  • Assists with digestion
  • Helps to reduce excessive appetite and restore balance
  • Helps relieve tension and irritability
  • Helps balance thirst and excessive urination
  • Supports other organs affected by hyperthyroidism, like the heart

How Resthyro™ Supports Cats with Hyperthyroidism

Resthyro™ was formulated by a holistic veterinarian and a master herbalist with a combined 50 years of experience treating pets. It’s made using powerful herbs such as eleuthero, bugleweed, lemon balm, and gotu kola. Together, these and other ingredients help to balance thyroid hormones in your pet’s body. They help your pet’s blood pressure healthier and promote better management of stress. As a feline hyperthyroidism remedy, this supplement can be taken alongside your vet’s prescribed medication to provide comprehensive support.

The Causes of Hyperthyroidism

Hyperthyroidism in cats is caused by excess production of thyroid hormones (T3 and T4). One of the most common causes of feline hyperthyroidism is a hormone-producing benign tumor. Most cases of cats with hyperthyroidism are older pets (generally over 10 years of age).

Clinical Signs of Feline Hyperthyroidism

  • Hyperactivity / Hyperexcitability
  • Weight loss
  • Increased appetite
  • Vomiting / diarrhea
  • Increased thirst
  • Increased urination
  • Hair loss
  • Excessive appetite
  • Increased heart rate
  • Shortness of breath
  • Seborrhea
  • Chronic skin infections

Cats with symptoms of feline hyperthyroidism may also experience secondary problems such as mild liver, kidney, or heart disease.

Additional Support

NHV supplements include multiple all-natural remedies for feline hyperthyroidism. If your cat is experiencing liver problems, we suggest NHV Milk Thistle; for kidney issues, we suggest NHV Tripsy; and for heart conditions, we suggest combining NHV Hearty Heart with Resthyro™.

Resthyro cat diagram

item number
0.70 LBS
3.4 fl. oz. (100ml)
life stages
adult, senior, kitten
made in

Disclaimer: The information provided in relation to the products mentioned is intended for general informational purposes only and should not be construed as professional veterinary advice or a substitute for consultation with a qualified veterinarian. These products are not intended to diagnose, treat, cure, or prevent any pet health condition. Consult a licensed veterinarian before using any product or making changes to your pet's diet, health, or wellness routine. Individual pet health outcomes may vary, and the effectiveness of the product may depend on various factors specific to your pet. Always carefully read and follow the product label and instructions. The manufacturer and distributor of these products do not assume any liability for any direct or indirect consequences that may arise from the use of these products on pets. All information is for educational purposes only. 


Eleuthero – Helps to balance the thyroid, stimulates the immune system, and helps to improve resistance to stress.

Bugleweed – Helps to reduce thyroid hormones in the body. It also slows and strengthens heart contractions. Relieves tension and irritability, and acts as a cough suppressant.

Lemon Balm – Inhibits thyroid activity by blocking thyroid-stimulating hormones. Also found to reduce stress, decrease blood pressure, and improve gastrointestinal activity.

Gotu KolaA small green herb known for its cleansing abilities and used to treat skin problems. It also has strong antioxidant, antibacterial, and anti-inflammatory properties.

Hawthorn – Helps strengthen and improve heart function.

Skullcap – Known for its relaxing and detoxifying qualities, as well as its ability to stimulate kidney function.

Valerian – Well known for its use in the treatment of anxiety, and has been used extensively as a mild sedative and pain reliever.


Inactive ingredients such as water, glycerin, or bases for ointments like olive oil are not listed in this ingredient tab. For a full list of ingredients, please see the label picture on the bottle, shown above. Information about ingredients is for educational purposes only. It is important to always refer to the product label for the most accurate and up-to-date information regarding ingredients.


Pet's Weight Dosage

To be taken twice daily. All NHV supplements are designed to be used together, and can, therefore, be given at once for convenience.

Select your pet's weight to determine the correct dose.

1 lb 10 lb 20 lb 30 lb 40 lb 50 lb 60 lb 70 lb 80 lb 90 lb 100 lb
lbs / kg

0 ml

To be taken twice daily

This is the minimum dosage

Product is provided with 1ml dropper. The graphic above is for dosage calculation purposes only

To be taken twice daily. Determine your pet’s weight and then use the easy chart below to determine the correct dose. This is the minimum dosage.


Pet's Weight Dosage

0 - 15 lb = 0.5 ml

16 - 30 lb = 1.0 ml

31 - 45 lb = 1.5 ml

46 - 60 lb = 2.0 ml

61 - 75 lb = 2.5 ml

Over 75 lb = 3.0 ml


How to Administer
Shake well before use. The easiest method is to use the dropper provided and place the drops into your pet’s food or favorite treat. You can also use the dropper and squirt directly into the pet’s mouth.

Some pets can be finicky, if this occurs consider hiding the drops in foods most pet’s love such as fish, chicken or yogurt or a favourite treat. If your pet only eats dry food then soak a few kibbles at feeding time.

For Best Results
Herbal dietary supplements are beneficial to the health and well-being of your pet and are safe for long-term use. Every pet responds to natural herbal supplements differently, therefore it is important to be consistent and administer the product daily. Supplements generally take two to four weeks to take effect, however this will vary from one animal to the next.

Product Storage
All NHV Natural Pet Products are pure herbal extracts and contain no artificial additives, preservatives or coloring. Shelf life after opening is 6 months and must be refrigerated after opening.

Cautions and Contraindications
Do not use Resthyro™ in pregnant or nursing animals. Should not be used in animals with hypothyroidism (under active thyroid gland). Speak to your vet before using our products. A second visit is recommended if your pet’s condition does not improve, or deteriorates after continued use of the supplements.

All information provided by NHV Natural Pet Products is for educational purposes only.


Can I use Resthyro along with a vet-prescribed feline hyperthyroidism remedy?

Yes. There are many pets that use the Resthyro™ alone and use it in conjunction with vet-prescribed medication. You will always want to make sure that you are doing regular blood work to see how your cat's thyroid is functioning.

How long will Resthyro™ take to relieve feline hyperthyroidism symptoms?

Resthyro™ is a gentle, herbal formulation. We generally say that the supplements take 3-4 weeks to work in the body. However, some animals may show improvement in as little as a few days.

Do I need to use Resthyro™ to help support my cat’s thyroid for the rest of her life?

You will want to use a feline hyperthyroidism remedy for the rest of her life, yes. It will help to always keep her thyroid balanced, which is important for her health.

I have other cats that don't have hyperthyroidism. If I put the Resthyro™ in their food, what will happen to my 'healthy' cats?

If your other cats get into the food with the Resthyro™ once in a while, it's not a very big deal. However, we wouldn't recommend making a habit of it.

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Resthyro™ for Cats

USD $50.95

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