Symphytum officinale
Made from comfrey — knitbone, the herb whose allantoin is a genuine wound-healing compound and whose modern warning is real liver toxicity.
The whole picture, in one breath
Think of bones that must knit and eyes that were struck: a fracture that aches and will not unite, an injury to the eyeball or the orbit, a blow to a bone over a nerve — the parts that need knitting rather than cleaning. The bone-knitter: that is Symphytum.
The substance, in plain words
Comfrey is the broad-leaved herb of riverbanks whose folk name is knitbone — and the chemistry agrees: allantoin, its signature compound, genuinely accelerates wound and bone repair, and comfrey creams were real pharmacy products. The same plant carries pyrrolizidine alkaloids that genuinely damage the liver — a true two-edged herb.
The traditional picture Classical sources
The inner state
- Irritability with the injury. Cross, impatient with the slow healing; worse in damp weather.
- Anxiety about recovery. Fear the bone will never knit, the eye never clear.
- Low spirits. Gloom in the long convalescence of fractures.
The body
- Fractures slow to unite. The keynote: bones that ache and refuse to knit after the surgeon has done his work — the books' great fracture remedy.
- Injuries to the eye. The celebrated use: blows to the eyeball and orbit, where Symphytum leads the repertory.
- Injuries over nerves. A blow where bone lies over nerve — shin, elbow, skull — with shooting, pricking pains after.
- Better for warmth and rest of the injured part. The remedy is less a modality portrait than an injury portrait: whatever knits, Symphytum serves.
- Worse damp weather. The old fracture aches before rain.
- Sprains and dislocations. After the joint has been put right, the torn attachments heal slowly — Symphytum's second territory.
Modalities (worse and better factors)
| Worse from ⬇ | Better from ⬇ |
|---|---|
| damp weather; injury to bone; after fractures and operations. | rest of the part; warmth; time. |
Where it acts (organ affinities)
Bones (fracture healing), eye and orbit, periosteum, sprained ligaments.
Where the classical picture comes from
Knitbone's folk reputation is ancient Anglo-Saxon herb medicine — bones set by surgeons, knit by comfrey. The proving confirmed the injury portrait, and the remedy entered the classical surgical repertory as the bone-knitter and the eye-blow remedy.
The substance in real medicine Pharmacology
What this section is: the pharmacology and toxicology of the source substance. It is not clinical evidence that a homeopathic preparation of it treats any condition. What controlled trials do and do not show is set out on the Evidence page.
Allantoin is genuinely wound-active — it stimulates cell growth and is used in real dermatological preparations; comfrey's external reputation has laboratory substance. But the plant's pyrrolizidine alkaloids caused documented liver injuries, and modern regulators rightly restrict internal comfrey. The herb that knits also, swallowed, poisons: a warning modern pharmacognosy wrote in full.
Look-alikes (how the classical authors told it apart)
| Remedy | Looks similar because… | Tells it apart because… |
|---|---|---|
| Arnica montana | Trauma | Arnica is the first remedy of every accident; Symphytum follows where bone and eye are the injured parts. |
| Ruta graveolens | Connective tissue, eye-strain | Ruta is the strained tendon and overused wrist; Symphytum the broken bone and struck eye. |
| Calcarea phosphorica | Bone growth | Calc-phos builds bone in the growing child; Symphytum knits it in the injured adult. |
| Hypericum perforatum | Nerve-rich injuries | Hypericum serves crushed nerve-endings; Symphytum bone-over-nerve blows. |