Pelargonium Sidoides (Umcka).
South African geranium for respiratory infections The tuberous root of a South African geranium, extracted into drops or capsules. Its coumarins and tannins support comfortable breathing and mucosal defences over a short course.
Reviewed March 2026
- Category
- Herb
- Also filed under
- BronchitisCold SymptomsRespiratory
What Pelargonium Sidoides (Umcka) is, and what it does.
- Does it work
- Suits households that pick up whatever is going round and want a short winter course. It is a root extract, so the species on the label is worth confirming.
- How much to take
- Start with 10mg to 30mg of the root extract a day for everyday airway comfort. Trials have run 60mg, and that figure is a research condition rather than a target.
- Time to feel it
- Three to five days is the usual window for a change in throat and chest comfort. It is used as a short course, not as a single dose.
- The first dose
- You get a dry, astringent taste from the tannins and not much more. What the root does builds across the days that follow.
- With regular use
- Most effects take 2-8 weeks. Be patient.
- How well tolerated
- Generally well tolerated. Check with your doctor if on medications.
- How it feels
- Reduced congestion and faster recovery from colds
- The overlooked benefit
- The prodelphinidin tannins that give it that astringency also bind non-haem iron in the gut, so an iron serving is better placed a couple of hours away from it.
10 to 30mg a day is where Pelargonium Sidoides (Umcka) works.
Source: Timmer et al., 2013, Cochrane Review
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
Pelargonium Sidoides (Umcka) has emerging evidence. Based on 561+ studies.
- Upper airway comfort through the colder monthsMeta-analysis
- Comfortable breathing during seasonal challengeRandomised trial
- Anti-adhesive activity at epithelial surfacesIn vitro study
- Extraction solvent strength and the delivered fractionIn vitro study
Questions people ask about Pelargonium Sidoides (Umcka).
- When should I take it?
- Timing matters less than consistency. Pick a time that works for you and take it daily.
- Can I take it with other supplements?
- Usually fine. The main thing to watch is not doubling up on the same ingredient from different products. If you're on prescription meds, check with your pharmacist first.
- Any side effects to watch for?
- Most people tolerate it well at recommended doses. GI upset is the most common complaint with any supplement. Start with a lower dose and work up. If something feels off, stop and reassess.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
Pelargonium proanthocyanidins increase ciliary beat frequency, which moves mucus, while N-acetyl cysteine cleaves the disulfide bridges that make mucus viscous. One thins the material, the other moves it.
Zinc is required for normal function of hundreds of enzymes including those governing lymphocyte proliferation. Pelargonium works on ciliary movement and on interferon signalling, so the two do not overlap.
Ascorbate concentrates in neutrophils and supports their normal chemotaxis and oxidative burst. Pelargonium acts on mucosal clearance and interferon release, a different arm of the same defence.
Elderberry anthocyanins bind viral surface glycoproteins and reduce cell entry, while pelargonium acts on the host side through ciliary clearance and interferon signalling. Respiratory blends combine an entry-side and a host-side agent for that reason.
Echinacea alkylamides act at cannabinoid CB2 receptors on immune cells and its polysaccharides stimulate macrophage activity, neither of which is a pelargonium mechanism. The pairing is standard in seasonal respiratory formulas.
Andrographolide modulates NF-kB signalling and the cytokine response, while pelargonium acts on mucosal clearance and interferon release. Two different arms of the upper respiratory response in one blend.
Thymol relaxes bronchial smooth muscle and thins secretions, complementing the ciliary-movement effect of pelargonium. European respiratory syrups have paired them for decades.
Mullein mucilage coats upper airway tissue while pelargonium works on clearance and immune signalling. The pairing is a demulcent placed alongside an active mover.
Marshmallow mucilage forms a film over throat tissue, a purely physical action that does not compete with pelargonium's ciliary and interferon effects. Standard practice in throat and chest formulas.
Licorice supplies glycyrrhizin and a soothing polysaccharide fraction that coats irritated throat tissue. Pelargonium root extract brings coumarins and condensed tannins from a different plant family. They are long-standing partners in European throat syrups. Sustained glycyrrhizin intake affects potassium and blood pressure regulation, which caps how long the pairing suits.
Slippery elm mucilage forms a physical gel on mucosal contact, an entirely mechanical action with no receptor involvement. Pelargonium acts chemically through its polyphenol fraction. A physical layer plus a chemical agent is a sensible formulation shape. Mucilage can slow absorption of anything taken at the same moment, so spacing helps.
Propolis is a bee-collected resin rich in caffeic acid phenethyl ester and flavonoids, standard in lozenges and throat sprays. Pelargonium root extract occupies the same product category with a different polyphenol class. The two overlap chemically more than they complement. Propolis is a genuine allergen for people sensitised to bee products.
Menthol activates TRPM8 cold-sensing receptors, giving a sensation of clearer breathing that is neurological rather than a change in airflow. Pelargonium contributes nothing at that receptor. The sensory and botanical effects are independent and easy to distinguish. Peppermint oil is unsuitable for infants and young children.
Carvacrol and thymol from oregano disrupt microbial membranes directly in laboratory assays. Pelargonium prodelphinidins have instead been described as interfering with microbial adhesion to epithelial cells. Two different laboratory mechanisms, neither carried into a combination study in people. Oregano oil is a strong mucosal irritant undiluted.
Ginger contributes gingerols and shogaols with documented eicosanoid effects and a warming character that suits the same formats. It shares the seasonal-wellness category with pelargonium rather than a mechanism. Higher ginger intakes carry mild antiplatelet activity. That is worth noting for anyone already on a blood-thinning regimen.
Quercetin stabilises mast cells and modulates inflammatory transcription in laboratory systems, chemistry that overlaps broadly with pelargonium's own polyphenol fraction. Overlap means the pairing is not two independent additions. Quercetin absorbs poorly on its own and is usually formulated with a lipid or an enzymatic aid. The combination is common in seasonal formulas.
Calcitriol binds the nuclear vitamin D receptor in monocytes and airway epithelium and drives transcription of cathelicidin and other antimicrobial peptides, which is settled molecular biology. Pelargonium provides no nuclear hormone signal. One acts transcriptionally and the other botanically, at different levels entirely. Vitamin D status is a foundation rather than an added effect.
Lactic acid bacteria engage gut-associated lymphoid tissue and generate short-chain fatty acids that feed colonocytes. Pelargonium acts at the airway end. The gut-lung axis is the argument for pairing them and it remains mechanistic rather than demonstrated in a combination study. Strain identity matters more than the word probiotic on a label.
Lactoferrin binds iron in tears, saliva and airway secretions, limiting the iron microbes can access at those surfaces. Pelargonium acts through polyphenols, not metal binding. A protein and a polyphenol at the same tissue is a genuine division of labour. Lactoferrin activity depends on gentle processing since heat denatures it.
Bovine colostrum supplies secretory immunoglobulins, lactoferrin and growth factors that act mainly within the gut lumen. Pelargonium contributes a root polyphenol fraction acting on the airway side. The two sit in different chemical classes at different barrier tissues. Colostrum is dairy-derived and carries the corresponding allergen consideration.
Astragalus root polysaccharides and saponins are used across weeks as background support in traditional practice. Pelargonium is typically taken as a short acute course. Pairing them combines a background botanical with a short-course one, which is a difference in intended duration rather than in mechanism. That distinction is the practical reason both appear in one regimen.
Nothing specific on file for Pelargonium Sidoides (Umcka). Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Pelargonium Sidoides (Umcka) actually does.
The medicinal part of Pelargonium sidoides is the tuberous root, not the leaf or the flower, and the characteristic constituents are highly oxygenated simple coumarins such as umckalin together with oligomeric prodelphinidins.
Prodelphinidins are condensed tannins built from gallocatechin units; condensed tannins complex proteins and polyvalent metal ions non-specifically, which explains their astringent taste and their capacity to reduce non-haem iron absorption when taken at the same time as an iron dose.
Polyphenol-rich extracts undergo extensive first-pass glucuronidation and sulfation, so the compounds circulating after a dose are conjugates rather than the parent molecules assayed in the extract.
Extraction solvent strength governs which fraction is delivered: the low-ethanol aqueous menstruum of the classical specification favours the coumarin and prodelphinidin fractions, and a stronger alcoholic extraction shifts the profile toward less polar constituents.
Where Pelargonium Sidoides (Umcka) comes from.
This comes from the root of a South African plant, dug up rather than picked. The roots are washed, sliced, dried and soaked in a weak alcohol and water mix that draws the active compounds out. Whether you end up with drops, a capsule or a syrup depends on what the maker does with that liquid next. A very similar-looking plant grows in the same places, so confirming which species went in is a real quality step.
Made from a plant. What ends up in the capsule tracks the harvest, so batch testing and a stated marker matter more here than with a made molecule.
Tuberous roots of a South African species from the geranium family, traditionally wild-collected in the Eastern Cape and increasingly cultivated as harvest pressure on wild populations became a conservation issue.
Roots are washed, sliced to open the interior and dried under controlled temperature; drying conditions influence how much of the coumarin fraction survives.
The dried root is extracted in a weak ethanol and water mixture, the ratio being part of the classical specification, which carries across both the coumarins and the oligomeric prodelphinidins.
Solids are filtered out and the liquid concentrated under reduced pressure to limit thermal exposure; some products are finished at this stage as a liquid.
Each batch is checked against a reference fingerprint and against coumarin markers, then adjusted to the declared native extract ratio.
Filled as a liquid, dried onto a carrier for solid dosage forms, or dispersed into a syrup or lozenge base.
Getting Pelargonium Sidoides (Umcka) from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.