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For thousands of years, healers have turned to Comfrey — the original "knit-bone" — to mend what modern medicine struggles to reach. The Comfrey Cast is our most concentrated Comfrey formula: pure Kauai-grown Comfrey root, solar-dehydrated at low temperatures to preserve live enzymes, then ground into a potent healing powder.

Mix it with water, apply it to the body, and let it work. It's that simple — and that powerful.

What It Supports

  • Broken & fractured bones
  • Sprains, strains & torn ligaments
  • Swelling, bruising & inflammation
  • Joint pain, arthritis & carpal tunnel
  • Hernias, bulging discs & rotator cuff injuries
  • Dental & gum discomfort (topical application)

Why Comfrey Root

The root holds a significantly higher concentration of allantoin — Comfrey's key cell-regenerating compound — than the leaves. Our root is harvested on our Kauai farm, slow-dried in a solar dehydrator to lock in live enzymes, and ground fresh to preserve full potency.

How to Apply

Note: Comfrey powder will expand considerably when water is added

  1. Measure enough powder to cover the affected area
  2. Add water gradually and mix into a paste (thickness depends on injury size and type)
  3. Apply immediately after mixing — it must be wet to adhere properly
  4. Let air dry completely; it will set from a flexible fruit-leather texture to a firm cast depending on thickness
  5. Leave on as long as possible for best results
  6. To remove: let dry pieces crumble off, then loosen the rest with lukewarm water

⚠️ For topical use only. Do not ingest. Comfrey Cast is not an edible product and should never be made into a tea or consumed internally.

Watch & Learn

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From Our Garden: The Flora Within

What people are saying.

★★★★★

5.0 average · 6 verified reviews

Comfrey Cast
Comfrey Cast
★★★★★
Incredible product!!! This is my third or fourth purchase of comfrey cast

Incredible product!!! This is my third or fourth purchase of comfrey cast. Literally healed a broken bone!!! This is a divine product. Absolute blessing from God. I don’t trust any other farm or comfrey product!!! Kauai Farmacy is my go to for healing products, education and ingredient quality and honorable business practice, transparency and excellence in products.

— Frances KithcartVerified
  • 5 stars: 86 (92%)
  • 4 stars: 6 (6%)
  • 3 stars: 0 (0%)
  • 2 stars: 1 (1%)
  • 1 star: 0 (0%)
Some of the reviews shown are from related products the merchant grouped with this one.
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Claire Winans-Keech
Comfrey Salve was a life saver with shingles

My husband got a bad case of shingles and the comfrey salve was the only thing that gave him any relief from the pain. We used it daily for months. I use it for my arthritis pain in my hands and feet. I feel relief within a couple of minutes and it lasts for hours

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Anonymous
Nothing has ever worked

Nothing has ever worked better

A
Anonymous
i have been using comfrey salve for a tailbone injury i recently incurred on the job

i have been using comfrey salve for a tailbone injury i recently incurred on the job. it helps with pain and i have made steady progress in healing.

A
Anonymous
Comfrey is my go to

I use Comfrey for arthritis and aching muscles. Lately, my husband has started using it to prevent leg cramps. It works! I've been buying comfrey products for Kauai Farmacy for years and will continue to do so.

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Gigi Christensen
My Nightly Go To

At 62, I have lots of aches and pains that disrupt my sleep. But if I remember to use my serum before bed, I have a much better night.

D
Debbie Senger
Absolutely Amazing

Absolutely Amazing....
I had twisted my left knee a week ago and I had some comfrey noni serum on hand, I tried it and put it on my knee 3 x per day.
At the end of the week the pain had subsided and I could walk much better....
as of this writing I'm able to walk without any pain.!! This product is absolutely
Amazing..!! I will continue to buy this serum and the comfrey salve.! Thank You
Kauia Staff for your dedication and hard work to bring to us these amazing products!! I'm a LONG TIME customer
Thank You again....

J
Jerome
Comfrey salve

I had been suffering from painful knee after a nasty fall, been using the comfrey salve for a couple of weeks now, I am really amazed how much it as help with pain and healing process.

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Anonymous
Great pain relief

It relieves my arthritis pain in my thumbs and also the bursitis in my hip. It is amazing!

H
Holly Murray
Awesome

Awesome - it relieves my pain

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Geraldo Pilon
Comfrey salve

Great product. I'm using it on my knee due to a soccer injury. It seems to help heal. I'll continue to use it.

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Colleen Engelhardt
Works great!

Hubby has had sore neck & headache issues. He woke up the other morning feeling miserable. He tried the Comfrey Salve, and said it almost completely relieved the pain and discomfort in about 10-15 minutes!

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Julie Gove
Love the purity and effectiveness of this salve

Love the purity and effectiveness of this salve. It does help my arthritic knee pain and stiffness.

So grateful for your farm and the hard work and integrity with which you harness the healing energy of what the earth produces in such a powerful pure environment.

T
Tom Noriega
Nature's Helping Hand

I purchased the product because I tore my medial meniscus while using a powerful post digging machine. I'm hoping that the Comfrey Salve will help the healing process. I'm told that only surgery will benefit me, but my research says the body has a remarkable ability to heal itself and I do want surgery.

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Cynthia P
Comfrey Hydrosol

This is awesome. I am using it for knee pain and it's very effective even better than I expected.

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Darlene Roudebush
Smells great

Smells great, easy to use, took away the arthritis pain in my hand.

C
Cheri Duzanica
Great for aches and pains

I use this on any part of my body that is feeling a bit of pain, especially on a couple of my fingers that have arthritis. Within seconds the pain is gone.

J
Janis
Miracle Balm

I love the way the comfrey salve smells and feels on my body, but the most exciting thing is it works! It has been a wonderful addition to my arsenal of natural products to ease the day-to-day aches and pains of life!

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Anonymous
Comfrey Salve Helps with Pain

Comfrey Salve from Kauai Pharmacy has helped me with hip pain and torn tendon pain. I apply it before bed and sleep a bit better, and also wake with less pain.

K
Kathy
So far it seems to be working on my left shoulder that's been killing me

So far it seems to be working on my left shoulder that's been killing me. I'll keep using it and hope for the best. I like the consistency of the salve.

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Anonymous
Liking it

I like the way it soaks into your skin. So far I have found that it helps with sore muscles but not with rheumatoid pain. Maybe it takes a while.

P
Priscilla

Very well made and effective comfry salve

L
Leanna Potter
The comfrey salve is amazing!!!

The comfrey salve is amazing. Our whole household uses it to relieve muscle and nerve pain. From back injury, injury related Neuropathy, to lyme disease, your salve is elevating the quality of our lives.

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Cindy Brill
I recommend your product to everyone !!i know

I recommend your product to everyone i know.
This salve helps me tremendously thank you

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Anonymous
Long time user of comfrey salve

I have been using comfrey salve on arthritic knees for years. When I forget to take in on a vacation, my knees suffer. It helps keep the joints moving! I also have a deteriorating spine. I rub it daily on the parts I can reach. It has helped with frequent headaches and mobility.

F
Frances Kithcart
Incredible product!!! This is my third or fourth purchase of comfrey cast

Incredible product!!! This is my third or fourth purchase of comfrey cast. Literally healed a broken bone!!! This is a divine product. Absolute blessing from God. I don’t trust any other farm or comfrey product!!! Kauai Farmacy is my go to for healing products, education and ingredient quality and honorable business practice, transparency and excellence in products.

C
Carol Young
Comfrey Salve

I got this to use on a couple joints in my hands. It seems to be helping ease the pain. I haven’t used it for too long yet, so I’m anxious to see how things improve as time goes on.
I must give a shout out for the excellent customer service I received! After shipping, it appeared to have never left Hawaii within a couple weeks. The post office received it, but it never left Hawaii. I wondered if the package had been lost. I contacted Kauai to see if they could check into it for me and they immediately resent my package. It arrived (this time) in the normal amount of time. I was very impressed with the customer service! Immediate resolution! Thank you so very much!

C
Carole Fitzpatrick
Comfort Salve

I purchased your Comfrey Salve to relieve the pain from a damaged ankle tendon and ligament. It was recommended by a friend. The salve did everything I hoped for - calming the inflammation that was causing the pain. Subtlety and effectively. It is a nice product, soothing texture. Quality ingredients. I'm trying it on knee joints, too.

S
Shireen Green
Excellent for muscle and osteoarthritis pain

Comfrey Salve has been beneficial is easing muscular aches in my knees and thighs. I use it nightly and I sleep better for it. I also massage it into my hands and wrists and it has greatly reduced the pain of osteoarthritis.

D
Debbie Senger
Excellent,I have found this to be so helpful for oainful muscles

Excellent
I have found this to be so helpful for oainful muscles, joints and bones...
It truly does take away the pain and I use it liberally on sore aching muscles.
Thank You for a Great and pure product that really works.! I will always buy more when I run out.

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Linda Gilbert
Sore muscle relief

I usethis primarily on sore over used muscles. Helps relieve the aches from workouts

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Linda Gilbert
Helps

I have started use this on my arthritic fingers. I feel a difference

Frequently asked

Questions & answers

Is comfrey safe for topical use?

Yes. Topical comfrey applied to intact skin is well-tolerated and has been the subject of numerous clinical trials. We recommend external use only and avoid open wounds — see below.

How is your comfrey grown and harvested?

Biodynamically, on our Kauai farm. Grown without chemicals; pests are managed with healthy soil and companion planting. Harvested by hand, dried slowly, and processed on-site.

How long until I feel results?

Varies by condition. Many customers report relief within days for muscle / joint issues; deeper bone or tendon work tends to need 2–6 weeks of consistent use.

Is it pregnancy / nursing safe?

Consult your healthcare provider. We don't make claims here — comfrey's pyrrolizidine alkaloid content is a topic to raise with someone who knows your specific situation.