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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.
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.
Note: Comfrey powder will expand considerably when water is added
⚠️ 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.
5.0 average · 6 verified reviews

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.
I had sprained my ankle and for 2 days I could not put pressure on my foot. It was painful if it wasn't elevated. When I remembered I had this I applied it overnight. The next morning I had NO pain! I could put pressure on it and walk on it!! I was still limping but I could do it and with little to no pain!. The cast is messy to put on but worth it
I have bunion on my big toe and whenever I walk too much or bend it too far, it hurts for days. I tried using the comfry balm, but didn't experience much benefit. Then, I decided to try the comfrey cast and couldn't believe how much it helped after 2-3 applications. I usually apply it in the evening while watching tv or reading and my toe feel so much better when I wake-up the next morning.
At 81, I was in a tricky position with a break to my dominant arm. I used Comfrey Cast and alternated the Comfrey Salve and also the Comfrey massage oil. I actually 'felt' the healing through a soothing feeling. I just got a report back today that the bone is 'healed' and now we being range of motion. Wow, thank you...
I smashed my little toe when a weight fell on it. My podiatrist took xrays every week for three weeks and it wasn't healing. I used the comfrey cast and within one week the bones were knitting and without any pain! I know recommend it to anyone with a bone or joint issue.
love this stuff!
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
Nothing has ever worked better
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.
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.
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.
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....
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.
It relieves my arthritis pain in my thumbs and also the bursitis in my hip. It is amazing!
Awesome - it relieves my pain
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.
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!
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.
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.
This is awesome. I am using it for knee pain and it's very effective even better than I expected.
Smells great, easy to use, took away the arthritis pain in my hand.
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.
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!
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.
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.
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.
Very well made and effective comfry salve
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.
I recommend your product to everyone i know.
This salve helps me tremendously thank you
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.
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.
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!
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.
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.
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.
I usethis primarily on sore over used muscles. Helps relieve the aches from workouts
I have started use this on my arthritic fingers. I feel a difference
Frequently asked
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.
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.
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.
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.
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