Parthenium Hysterophorus.
Research-backed compound with potential health benefits. Invasive weed from Americas, now global pest. Also called congress grass.
Reviewed March 2026
- Category
- Compound
What Parthenium Hysterophorus is, and what it does.
- Does it work
- Some antimicrobial activity in lab. Not developed as medicine.
- How much to take
- The record carries a daily band of 100mg to 250mg. No human dosing study has been published, so start at the lower end and follow the product's own directions.
- Time to feel it
- Nobody has measured an onset for this plant in people. What is documented is skin reactivity, which can show up within a day of handling the fresh plant.
- The first dose
- Nothing has been measured in people on day one. The documented day-one issue is skin contact with the fresh plant rather than anything from an oral amount.
- With regular use
- No human study has followed daily use across weeks, so there is nothing measured to report. The laboratory work looks at the plant's compounds, not at long-term intake.
- How well tolerated
- Contains parthenin and other sesquiterpene lactones. Causes contact dermatitis.
- How it feels
- Nobody has recorded a subjective experience from taking it. The sensation the literature does describe is skin irritation in people who handle the plant in the field.
- The overlooked benefit
- Most of its 1,383 published records are ecological and occupational rather than nutritional, covering it as an invasive plant and as a skin irritant for the people who clear it.
100 to 250mg a day is where Parthenium Hysterophorus works.
Source: Kumar et al., J Ethnopharmacol, 2011; toxicity references
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.
Parthenium Hysterophorus is documented in the library; the clinical read is in the queue. Nothing about the strength of the research prints until the read is done.
- antimicrobial activity of leaf and whole-plant extractsIn vitro study
- antioxidant activity of plant extractsIn vitro study
- parthenin and sesquiterpene lactone content driving skin contact reactivityNarrative review
- cell toxicity of parthenin in cultureIn vitro study
- occupational exposure among agricultural workersCohort study
Questions people ask about Parthenium Hysterophorus.
- 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.
No pairing data for Parthenium Hysterophorus yet.
Nothing on file for Parthenium Hysterophorus, either from a combination trial or from settled biochemistry. When either lands, it appears here with its source.
Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.
No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
21 pairings are live across the library today. Checked 9 August 2026.
Nothing specific on file for Parthenium Hysterophorus. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.Getting Parthenium Hysterophorus 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.
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.