Perennial ryegrass

Perennial ryegrass – Lexicon

Perennial ryegrass, botanically Lolium perenne, is a perennial true grass that originally comes from Europe and is now cultivated worldwide. It is known above all as a forage grass and lawn seed – thanks to its rapid germination, high resistance to trampling, and ability to regenerate. Yet beyond its agricultural use, the plant is increasingly attracting the attention of naturopathy and health research: extracts and pollen preparations from Lolium perenne are used medicinally, particularly in the field of immunomodulation and for allergic conditions.

Its nutrient-rich composition – with high-quality proteins, essential amino acids, minerals, and secondary plant compounds – also makes Perennial ryegrass interesting as a base for functional dietary supplements or green plant extracts.

What benefits does Perennial ryegrass offer?

Studies have been able to link Perennial ryegrass to various effects and suggest a certain medicinal potential. However, the results of these studies should be viewed critically, because not all findings can simply be transferred and more research is necessary to draw definitive conclusions.

  • Immunomodulating effects: Pollen extracts of Perennial ryegrass are used in specific immunotherapy (hyposensitization) for hay fever in order to reduce allergic reactions to grass pollen in the long term (1,2).
  • Antioxidant properties: Chlorophyll, enzymes, and plant polyphenols from grass extracts can bind free radicals and support cell protection – similar to other green plant juices (3).
  • Anti-inflammatory effects: Studies suggest that various active compounds of Perennial ryegrass can exert anti-inflammatory effects (4).

How Perennial ryegrass Works

Various active compounds are responsible for these effects, including chlorophyll, various enzymes and minerals as well as amino acids.

Side Effects and Risks

Here too, more research is necessary to be able to make valid statements, but the following points seem plausible:

  • Allergenic potential: The pollen of Perennial ryegrass is among the most common triggers of seasonal hay fever.
  • Not suitable for everyone: People with a known grass pollen allergy should exercise caution when taking Perennial ryegrass extracts or seek medical advice.

Conclusion

Perennial ryegrass is far more than just a robust forage or lawn grass. It provides valuable plant nutrients that could offer health benefits in concentrated form – especially for allergies and oxidative stress. Thanks to its high biological availability and broad nutrient spectrum, it may have earned a place in modern naturopathy, although more research is necessary before definitive conclusions about its effects can be drawn.

Sources:

  1. Mösges, R., Koch, A. F., Raskopf, E., Singh, J., Shah-Hosseini, K., Astvatsatourov, A., Hauswald, B., Yarin, Y., Corazza, F., Haazen, L., Pirotton, S., Allekotte, S., Zadoyan, G., Legon, T., Durham, S. R., & Shamji, M. H. (2018). Lolium perenne peptide immunotherapy is well tolerated and elicits a protective B-cell response in seasonal allergic rhinitis patients. Allergy, 73(6), 1254–1262. https://doi.org/10.1111/all.13392
  2. FreidhoffL. R, Ehrlich-Kautzky E., Meyers D. A, Marsh D. G (1987)A study of the human immune response to Lolium perenne (rye) pollen and its components, Lol p I and Lol p II (Rye I and Rye II): II. Longitudinal variation of antibody levels in relation to symptomatology and pollen exposure and correction of seasonally elevated antibody levels to basal values,Journal of Allergy and Clinical Immunology,Volume 80, Issue 5,1987,Pages 646-655,ISSN 0091-6749,https://doi.org/10.1016/0091-6749(87)90283-1.
  3. Nagaty Mahrous, M., Attia, E., Abdelkader, M., Hamed, A. (2023). Phytochemical Screening, and In Vitro Evaluation of Antioxidant Activity of Lolium Perenne. Journal of Advanced Biomedical and Pharmaceutical Sciences, 6(3), 150–154. doi: 10.21608/jabps.2023.198473.1185
  4. Mahrous, M. N., Attia, E. Z., Abdelkader, M. S. A., Abouzed, D. E. E., Gebril, S. M., Alnajjar, R., Al-Karmalawy, A. A., & Hamed, A. N. E. (2025). Chemical composition and antiosteoarthritis potential of Lolium perenne L. assisted with computational studies. Fitoterapia, 183, 106551. https://doi.org/10.1016/j.fitote.2025.106551