Recipe
Comfrey leaf oil (external only)
- Herb:
- Symphytum officinale Symphytum officinale
- Method:
- Herbal oil
- Plant part:
- Leaf
About 40 minAdvancedRecipe science profile
Procedure
- Chop dried leaf and fill a jar about one third full, then cover with olive or sunflower oil.
- Macerate 4–6 weeks in a warm shady place, then strain through cloth.
- Use on intact skin only after a patch test on the inner forearm — do not consume; pyrrolizidine alkaloids are risky with internal exposure.
Extraction
- Herb:
- poměry dle kroků receptu na kartě
- Solvent:
- mediální složení (voda, alkohol, olej, med…) viz jednotlivé kroky
- Shelf life:
- po přípravě uchovávej hygienicky a podle typu výrobku (chlad, světlo, alkohol)
- Target compounds:
- orientační domácí extrakce — profil závisí na teplotě, času řezu a poměrech
Notes
EMA-style texts discuss comfrey root for traditional short-term external adult use; treat leaf cautiously and only externally — see the herb card.
Why it works
Regulatory texts often address comfrey root for traditional short-term external adult use; leaf material is less standardised and pyrrolizidine alkaloids are a documented concern for internal exposure. A home macerated oil is a variable extract for unbroken skin only — not equivalent to assessed herbal medicines.
Literature
- Vyhledávání studií (PubMed apod.) — Konkrétní vědecká tvrzení ověř na kartě byliny a v primární literatuře.
Related
Symphytum officinale — Herb card
Herbal oil — Processing method detail